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2
build/.cvsignore
Normal file
2
build/.cvsignore
Normal file
@@ -0,0 +1,2 @@
|
||||
bin*
|
||||
*.pdb
|
||||
122
build/Jamfile
Normal file
122
build/Jamfile
Normal file
@@ -0,0 +1,122 @@
|
||||
# Copyright 2006 Roland Schwarz.
|
||||
# Distributed under the Boost Software License, Version 1.0. (See
|
||||
# accompanying file LICENSE_1_0.txt or copy at
|
||||
# http://www.boost.org/LICENSE_1_0.txt)
|
||||
#
|
||||
# This work is a reimplementation along the design and ideas
|
||||
# of William E. Kempf.
|
||||
|
||||
subproject libs/thread/build ;
|
||||
|
||||
import ./threads ;
|
||||
|
||||
# pthreads is compiled on all platforms when available
|
||||
if [ threads::is-pthread-available ] {
|
||||
|
||||
template pthread_base
|
||||
: ## sources ##
|
||||
[ threads::cpp_source ../src/pthread :
|
||||
thread
|
||||
mutex
|
||||
recursive_mutex
|
||||
condition
|
||||
exceptions
|
||||
xtime
|
||||
once
|
||||
tss
|
||||
]
|
||||
: ## requirements ##
|
||||
threads::lib-pthread
|
||||
<sysinclude>$(BOOST_ROOT)
|
||||
<threading>multi
|
||||
<define>BOOST_THREAD_POSIX
|
||||
common-variant-tag
|
||||
<borland><*><cxxflags>-w-8004
|
||||
<borland><*><cxxflags>-w-8057
|
||||
;
|
||||
|
||||
lib boost_thread_pthread
|
||||
: <template>pthread_base
|
||||
: ## requirements ##
|
||||
<define>BOOST_THREAD_BUILD_LIB=1
|
||||
;
|
||||
|
||||
dll boost_thread_pthread
|
||||
: <template>pthread_base
|
||||
: ## requirements ##
|
||||
<runtime-link>dynamic
|
||||
<define>BOOST_THREAD_BUILD_DLL=1
|
||||
;
|
||||
|
||||
stage bin-stage
|
||||
: <dll>boost_thread_pthread
|
||||
<lib>boost_thread_pthread
|
||||
;
|
||||
|
||||
install thread_pthread lib
|
||||
: <dll>boost_thread_pthread
|
||||
<lib>boost_thread_pthread
|
||||
;
|
||||
|
||||
# the next is true on platforms where pthreads is native threading lib
|
||||
if [ threads::is-native-on-build-os pthread ] {
|
||||
|
||||
lib boost_thread
|
||||
: <template>pthread_base
|
||||
: ## requirements ##
|
||||
<define>BOOST_THREAD_BUILD_LIB=1
|
||||
;
|
||||
|
||||
dll boost_thread
|
||||
: <template>pthread_base
|
||||
: ## requirements ##
|
||||
<runtime-link>dynamic
|
||||
<define>BOOST_THREAD_BUILD_DLL=1
|
||||
;
|
||||
}
|
||||
}
|
||||
|
||||
if [ threads::is-native-on-build-os win32 ] {
|
||||
|
||||
template win32_base
|
||||
: ## sources ##
|
||||
[ threads::cpp_source ../src/win32 :
|
||||
thread
|
||||
exceptions
|
||||
xtime
|
||||
tss
|
||||
tss_hooks
|
||||
tss_dll
|
||||
tss_pe
|
||||
]
|
||||
: ## requirements ##
|
||||
<sysinclude>$(BOOST_ROOT)
|
||||
<threading>multi
|
||||
common-variant-tag
|
||||
<borland><*><cxxflags>-w-8004
|
||||
<borland><*><cxxflags>-w-8057
|
||||
;
|
||||
|
||||
lib boost_thread
|
||||
: <template>win32_base
|
||||
: ## requirements ##
|
||||
<define>BOOST_THREAD_BUILD_LIB=1
|
||||
;
|
||||
|
||||
dll boost_thread
|
||||
: <template>win32_base
|
||||
: ## requirements ##
|
||||
<runtime-link>dynamic
|
||||
<define>BOOST_THREAD_BUILD_DLL=1
|
||||
;
|
||||
}
|
||||
|
||||
stage bin-stage
|
||||
: <dll>boost_thread
|
||||
<lib>boost_thread
|
||||
;
|
||||
|
||||
install thread lib
|
||||
: <dll>boost_thread
|
||||
<lib>boost_thread
|
||||
;
|
||||
61
build/Jamfile.v2
Normal file
61
build/Jamfile.v2
Normal file
@@ -0,0 +1,61 @@
|
||||
# Copyright 2006 Roland Schwarz.
|
||||
# Distributed under the Boost Software License, Version 1.0. (See
|
||||
# accompanying file LICENSE_1_0.txt or copy at
|
||||
# http://www.boost.org/LICENSE_1_0.txt)
|
||||
#
|
||||
# This work is a reimplementation along the design and ideas
|
||||
# of William E. Kempf.
|
||||
|
||||
import thread ;
|
||||
|
||||
project boost/thread
|
||||
: source-location ../src
|
||||
: requirements <threading>multi
|
||||
<link>static:<define>BOOST_THREAD_BUILD_LIB=1
|
||||
<link>shared:<define>BOOST_THREAD_BUILD_DLL=1
|
||||
: default-build <threading>multi [ thread.default-api ]
|
||||
;
|
||||
|
||||
# build the pthread based variant
|
||||
lib boost_thread_pthread
|
||||
: ## sources ##
|
||||
pthread/thread.cpp
|
||||
pthread/mutex.cpp
|
||||
pthread/recursive_mutex.cpp
|
||||
pthread/condition.cpp
|
||||
pthread/exceptions.cpp
|
||||
pthread/xtime.cpp
|
||||
pthread/tss.cpp
|
||||
: ## requirements ##
|
||||
<define>BOOST_THREAD_POSIX
|
||||
<thrd-api>pthread
|
||||
;
|
||||
|
||||
# use pthread on platforms where pthread is considered native
|
||||
lib boost_thread
|
||||
: ## sources ##
|
||||
pthread/thread.cpp
|
||||
pthread/mutex.cpp
|
||||
pthread/recursive_mutex.cpp
|
||||
pthread/condition.cpp
|
||||
pthread/exceptions.cpp
|
||||
pthread/xtime.cpp
|
||||
pthread/tss.cpp
|
||||
: ## requirements ##
|
||||
<define>BOOST_THREAD_POSIX
|
||||
<thrd-api>pthread
|
||||
;
|
||||
# the win32 native variant
|
||||
lib boost_thread
|
||||
: ## sources ##
|
||||
win32/thread.cpp
|
||||
win32/exceptions.cpp
|
||||
win32/xtime.cpp
|
||||
win32/tss.cpp
|
||||
win32/tss_hooks.cpp
|
||||
win32/tss_dll.cpp
|
||||
win32/tss_pe.cpp
|
||||
: ## requirements ##
|
||||
<thrd-api>win32
|
||||
;
|
||||
|
||||
70
build/thread.jam
Normal file
70
build/thread.jam
Normal file
@@ -0,0 +1,70 @@
|
||||
# Copyright 2006 Roland Schwarz.
|
||||
# Distributed under the Boost Software License, Version 1.0. (See
|
||||
# accompanying file LICENSE_1_0.txt or copy at
|
||||
# http://www.boost.org/LICENSE_1_0.txt)
|
||||
#
|
||||
# This work is a reimplementation along the design and ideas
|
||||
# of William E. Kempf.
|
||||
|
||||
import modules ;
|
||||
import os ;
|
||||
import feature ;
|
||||
import property ;
|
||||
|
||||
# supported threading api's
|
||||
feature.feature thrd-api : pthread win32 : symmetric ;
|
||||
|
||||
# save a reference to the original lib rule
|
||||
IMPORT : lib : $(__name__) : type.lib ;
|
||||
|
||||
# local override of the global lib rule
|
||||
rule lib ( name : sources * : requirements * : default-build * : usage-requirements * )
|
||||
{
|
||||
if <thrd-api>pthread in $(requirements)
|
||||
{
|
||||
if [ os.name ] = "NT"
|
||||
{
|
||||
local PTW32_INCLUDE = [ modules.peek : PTW32_INCLUDE ] ;
|
||||
local PTW32_LIB = [ modules.peek : PTW32_LIB ] ;
|
||||
if $(PTW32_INCLUDE) && $(PTW32_LIB)
|
||||
{
|
||||
requirements =
|
||||
[ property.refine $(requirements) :
|
||||
<define>BOOST_HAS_PTHREADS
|
||||
<include>$(PTW32_INCLUDE)
|
||||
<library>$(PTW32_LIB)
|
||||
] ;
|
||||
}
|
||||
else
|
||||
{
|
||||
requirements += <build>no ;
|
||||
# it would be nice if this message appears only once ...
|
||||
# but I cannot figure out how to detectd the second phase.
|
||||
echo "******************************************************" ;
|
||||
echo "Building Boost.Thread without pthread support" ;
|
||||
echo "If you need pthread you should specify the paths." ;
|
||||
echo "For example:" ;
|
||||
echo "PTW32_INCLUDE=C:\\Program Files\\ptw32\\Pre-built2\\include" ;
|
||||
echo "PTW32_LIB=C:\\Program Files\\ptw32\\Pre-built2\\lib\\pthreadVC2.lib" ;
|
||||
echo "******************************************************" ;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return [ type.lib $(name) : $(sources) : $(requirements) : $(default-build) : $(usage-requirements) ] ;
|
||||
}
|
||||
|
||||
# auto export of rule lib to calling module only
|
||||
IMPORT $(__name__) : lib : [ CALLER_MODULE 1 ] : lib ;
|
||||
|
||||
rule default-api
|
||||
{
|
||||
if [ os.name ] = "NT"
|
||||
{
|
||||
return <thrd-api>win32 ;
|
||||
}
|
||||
else
|
||||
{
|
||||
return <thrd-api>pthread ;
|
||||
}
|
||||
}
|
||||
65
build/threads.jam
Normal file
65
build/threads.jam
Normal file
@@ -0,0 +1,65 @@
|
||||
# Copyright 2006 Roland Schwarz.
|
||||
# Distributed under the Boost Software License, Version 1.0. (See
|
||||
# accompanying file LICENSE_1_0.txt or copy at
|
||||
# http://www.boost.org/LICENSE_1_0.txt)
|
||||
#
|
||||
# This work is a reimplementation along the design and ideas
|
||||
# of William E. Kempf.
|
||||
|
||||
# find out if pthread is available on current build platform
|
||||
rule threads::is-pthread-available
|
||||
{
|
||||
if $(OS) = "NT" {
|
||||
if $(PTW32_INCLUDE) && $(PTW32_LIB) {
|
||||
return true ;
|
||||
}
|
||||
else {
|
||||
ECHO "******************************************************" ;
|
||||
ECHO "Building Boost.Thread without pthread support" ;
|
||||
ECHO "If you need pthread you should specify the paths." ;
|
||||
ECHO "For example:" ;
|
||||
ECHO "PTW32_INCLUDE=C:\\Program Files\\ptw32\\Pre-built2\\include" ;
|
||||
ECHO "PTW32_LIB=C:\\Program Files\\ptw32\\Pre-built2\\lib\\pthreadVC2.lib" ;
|
||||
ECHO "******************************************************" ;
|
||||
}
|
||||
}
|
||||
else if $(OS) = "LINUX" {
|
||||
return true ;
|
||||
}
|
||||
else { ## assume pthread is available on unknown os for now
|
||||
return true ;
|
||||
}
|
||||
}
|
||||
|
||||
# find the native library variant for current build os
|
||||
rule threads::is-native-on-build-os ( libvariant )
|
||||
{
|
||||
if $(OS) = "NT" {
|
||||
if $(libvariant) = win32 { return true ; }
|
||||
}
|
||||
else if $(OS) = "LINUX" {
|
||||
if $(libvariant) = pthread { return true ; }
|
||||
}
|
||||
else { ## assume pthread is native on others for now
|
||||
if $(libvariant) = pthread { return true ; }
|
||||
}
|
||||
}
|
||||
|
||||
# utility to prepend the source path to the cpp sources
|
||||
rule threads::cpp_source ( path : sources * )
|
||||
{
|
||||
return $(path)/$(sources).cpp ;
|
||||
}
|
||||
|
||||
# impose the pthread library and include path on the requirements
|
||||
rule threads::lib-pthread ( toolset variant : subvariant-path properties * )
|
||||
{
|
||||
if $(OS) = "NT" && $(PTW32_INCLUDE) && $(PTW32_LIB) {
|
||||
properties = [ impose-requirements $(properties) :
|
||||
<define>BOOST_HAS_PTHREADS
|
||||
<include>$(PTW32_INCLUDE)
|
||||
<library-file>$(PTW32_LIB) ] ;
|
||||
}
|
||||
|
||||
return $(subvariant-path) $(properties) ;
|
||||
}
|
||||
6
doc/Jamfile.v2
Normal file
6
doc/Jamfile.v2
Normal file
@@ -0,0 +1,6 @@
|
||||
|
||||
import toolset ;
|
||||
toolset.using doxygen ;
|
||||
|
||||
boostbook thread : thread.xml ;
|
||||
|
||||
64
doc/acknowledgements.xml
Normal file
64
doc/acknowledgements.xml
Normal file
@@ -0,0 +1,64 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<section id="thread.acknowledgements"
|
||||
last-revision="$Date$">
|
||||
<title>Acknowledgements</title>
|
||||
<para>William E. Kempf was the architect, designer, and implementor of
|
||||
&Boost.Threads;.</para>
|
||||
<para>Mac OS Carbon implementation written by Mac Murrett.</para>
|
||||
<para>Dave Moore provided initial submissions and further comments on the
|
||||
<code>barrier</code>
|
||||
,
|
||||
<code>thread_pool</code>
|
||||
,
|
||||
<code>read_write_mutex</code>
|
||||
,
|
||||
<code>read_write_try_mutex</code>
|
||||
and
|
||||
<code>read_write_timed_mutex</code>
|
||||
classes.</para>
|
||||
<para>Important contributions were also made by Jeremy Siek (lots of input
|
||||
on the design and on the implementation), Alexander Terekhov (lots of input
|
||||
on the Win32 implementation, especially in regards to boost::condition, as
|
||||
well as a lot of explanation of POSIX behavior), Greg Colvin (lots of input
|
||||
on the design), Paul Mclachlan, Thomas Matelich and Iain Hanson (for help
|
||||
in trying to get the build to work on other platforms), and Kevin S. Van
|
||||
Horn (for several updates/corrections to the documentation).</para>
|
||||
<para>Mike Glassford finished changes to &Boost.Threads; that were begun
|
||||
by William Kempf and moved them into the main CVS branch.
|
||||
He also addressed a number of issues that were brought up on the Boost
|
||||
developer's mailing list and provided some additions and changes to the
|
||||
read_write_mutex and related classes.</para>
|
||||
<para>The documentation was written by William E. Kempf. Beman Dawes
|
||||
provided additional documentation material and editing.
|
||||
Mike Glassford finished William Kempf's conversion of the documentation to
|
||||
BoostBook format and added a number of new sections.</para>
|
||||
<para>Discussions on the boost.org mailing list were essential in the
|
||||
development of &Boost.Threads;
|
||||
. As of August 1, 2001, participants included Alan Griffiths, Albrecht
|
||||
Fritzsche, Aleksey Gurtovoy, Alexander Terekhov, Andrew Green, Andy Sawyer,
|
||||
Asger Alstrup Nielsen, Beman Dawes, Bill Klein, Bill Rutiser, Bill Wade,
|
||||
Branko èibej, Brent Verner, Craig Henderson, Csaba Szepesvari,
|
||||
Dale Peakall, Damian Dixon, Dan Nuffer, Darryl Green, Daryle Walker, David
|
||||
Abrahams, David Allan Finch, Dejan Jelovic, Dietmar Kuehl, Douglas Gregor,
|
||||
Duncan Harris, Ed Brey, Eric Swanson, Eugene Karpachov, Fabrice Truillot,
|
||||
Frank Gerlach, Gary Powell, Gernot Neppert, Geurt Vos, Ghazi Ramadan, Greg
|
||||
Colvin, Gregory Seidman, HYS, Iain Hanson, Ian Bruntlett, J Panzer, Jeff
|
||||
Garland, Jeff Paquette, Jens Maurer, Jeremy Siek, Jesse Jones, Joe Gottman,
|
||||
John (EBo) David, John Bandela, John Maddock, John Max Skaller, John
|
||||
Panzer, Jon Jagger , Karl Nelson, Kevlin Henney, KG Chandrasekhar, Levente
|
||||
Farkas, Lie-Quan Lee, Lois Goldthwaite, Luis Pedro Coelho, Marc Girod, Mark
|
||||
A. Borgerding, Mark Rodgers, Marshall Clow, Matthew Austern, Matthew Hurd,
|
||||
Michael D. Crawford, Michael H. Cox , Mike Haller, Miki Jovanovic, Nathan
|
||||
Myers, Paul Moore, Pavel Cisler, Peter Dimov, Petr Kocmid, Philip Nash,
|
||||
Rainer Deyke, Reid Sweatman, Ross Smith, Scott McCaskill, Shalom Reich,
|
||||
Steve Cleary, Steven Kirk, Thomas Holenstein, Thomas Matelich, Trevor
|
||||
Perrin, Valentin Bonnard, Vesa Karvonen, Wayne Miller, and William
|
||||
Kempf.</para>
|
||||
<para>Apologies for anyone inadvertently missed.</para>
|
||||
</section>
|
||||
|
||||
78
doc/barrier-ref.xml
Normal file
78
doc/barrier-ref.xml
Normal file
@@ -0,0 +1,78 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<header name="boost/thread/barrier.hpp"
|
||||
last-revision="$Date$">
|
||||
<namespace name="boost">
|
||||
<class name="barrier">
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<purpose>
|
||||
<para>An object of class <classname>barrier</classname> is a synchronization
|
||||
primitive used to cause a set of threads to wait until they each perform a
|
||||
certain function or each reach a particular point in their execution.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>When a barrier is created, it is initialized with a thread count N.
|
||||
The first N-1 calls to <code>wait()</code> will all cause their threads to be blocked.
|
||||
The Nth call to <code>wait()</code> will allow all of the waiting threads, including
|
||||
the Nth thread, to be placed in a ready state. The Nth call will also "reset"
|
||||
the barrier such that, if an additional N+1th call is made to <code>wait()</code>,
|
||||
it will be as though this were the first call to <code>wait()</code>; in other
|
||||
words, the N+1th to 2N-1th calls to <code>wait()</code> will cause their
|
||||
threads to be blocked, and the 2Nth call to <code>wait()</code> will allow all of
|
||||
the waiting threads, including the 2Nth thread, to be placed in a ready state
|
||||
and reset the barrier. This functionality allows the same set of N threads to re-use
|
||||
a barrier object to synchronize their execution at multiple points during their
|
||||
execution.</para>
|
||||
<para>See <xref linkend="threads.glossary"/> for definitions of thread
|
||||
states <link linkend="threads.glossary.thread-state">blocked</link>
|
||||
and <link linkend="threads.glossary.thread-state">ready</link>.
|
||||
Note that "waiting" is a synonym for blocked.</para>
|
||||
</description>
|
||||
|
||||
<constructor>
|
||||
<parameter name="count">
|
||||
<paramtype>size_t</paramtype>
|
||||
</parameter>
|
||||
|
||||
<effects><simpara>Constructs a <classname>barrier</classname> object that
|
||||
will cause <code>count</code> threads to block on a call to <code>wait()</code>.
|
||||
</simpara></effects>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects><simpara>Destroys <code>*this</code>. If threads are still executing
|
||||
their <code>wait()</code> operations, the behavior for these threads is undefined.
|
||||
</simpara></effects>
|
||||
</destructor>
|
||||
|
||||
<method-group name="waiting">
|
||||
<method name="wait">
|
||||
<type>bool</type>
|
||||
|
||||
<effects><simpara>Wait until N threads call <code>wait()</code>, where
|
||||
N equals the <code>count</code> provided to the constructor for the
|
||||
barrier object.</simpara>
|
||||
<simpara><emphasis role="bold">Note</emphasis> that if the barrier is
|
||||
destroyed before <code>wait()</code> can return, the behavior is
|
||||
undefined.</simpara></effects>
|
||||
|
||||
<returns>Exactly one of the N threads will receive a return value
|
||||
of <code>true</code>, the others will receive a value of <code>false</code>.
|
||||
Precisely which thread receives the return value of <code>true</code> will
|
||||
be implementation-defined. Applications can use this value to designate one
|
||||
thread as a leader that will take a certain action, and the other threads
|
||||
emerging from the barrier can wait for that action to take place.</returns>
|
||||
</method>
|
||||
</method-group>
|
||||
</class>
|
||||
</namespace>
|
||||
</header>
|
||||
230
doc/bibliography.xml
Normal file
230
doc/bibliography.xml
Normal file
@@ -0,0 +1,230 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<bibliography id="threads.bibliography"
|
||||
last-revision="$Date$">
|
||||
<title>Bibliography</title>
|
||||
<biblioentry id="threads.bib.AndrewsSchneider83">
|
||||
<abbrev id="threads.bib.AndrewsSchneider83.abbrev">AndrewsSchnieder83</abbrev>
|
||||
<biblioset relation="journal">
|
||||
<title>ACM Computing Surveys</title>
|
||||
<volumenum>Vol. 15</volumenum>
|
||||
<issuenum>No. 1</issuenum>
|
||||
<date>March, 1983</date>
|
||||
</biblioset>
|
||||
<biblioset relation="article">
|
||||
<authorgroup>
|
||||
<author>
|
||||
<firstname>Gregory</firstname>
|
||||
<othername>R.</othername>
|
||||
<surname>Andrews</surname>
|
||||
</author>
|
||||
<author>
|
||||
<firstname>Fred</firstname>
|
||||
<othername>B.</othername>
|
||||
<surname>Schneider</surname>
|
||||
</author>
|
||||
</authorgroup>
|
||||
<title>
|
||||
<ulink
|
||||
url="http://www.acm.org/pubs/citations/journals/surveys/1983-15-1/p3-andrews/"
|
||||
>Concepts and Notations for Concurrent Programming</ulink>
|
||||
</title>
|
||||
</biblioset>
|
||||
<para>Good general background reading. Includes descriptions of Path
|
||||
Expressions, Message Passing, and Remote Procedure Call in addition to the
|
||||
basics</para>
|
||||
</biblioentry>
|
||||
<biblioentry id="threads.bib.Boost">
|
||||
<abbrev id="threads.bib.Boost.abbrev">Boost</abbrev>
|
||||
<bibliomisc>The <emphasis>Boost</emphasis> world wide web site.
|
||||
<ulink url="http:/www.boost.org">http://www.boost.org</ulink></bibliomisc>
|
||||
<para>&Boost.Threads; is one of many Boost libraries. The Boost web
|
||||
site includes a great deal of documentation and general information which
|
||||
applies to all Boost libraries. Current copies of the libraries including
|
||||
documentation and test programs may be downloaded from the web
|
||||
site.</para>
|
||||
</biblioentry>
|
||||
<biblioentry id="threads.bib.Hansen73">
|
||||
<abbrev id="threads.bib.Hansen73.abbrev">Hansen73</abbrev>
|
||||
<biblioset relation="journal">
|
||||
<title>ACM Computing Surveys</title>
|
||||
<volumenum>Vol. 5</volumenum>
|
||||
<issuenum>No. 4</issuenum>
|
||||
<date>December, 1973</date>
|
||||
</biblioset>
|
||||
<biblioset relation="article">
|
||||
<author>0-201-63392-2
|
||||
<firstname>Per Brinch</firstname>
|
||||
<lastname>Hansen</lastname>
|
||||
</author>
|
||||
<title>
|
||||
<ulink
|
||||
url="http://www.acm.org/pubs/articles/journals/surveys/1973-5-4/p223-hansen/"
|
||||
>Concurrent Programming Concepts</ulink>
|
||||
</title>
|
||||
</biblioset>
|
||||
<para>"This paper describes the evolution of language features for
|
||||
multiprogramming from event queues and semaphores to critical regions and
|
||||
monitors." Includes analysis of why events are considered error-prone. Also
|
||||
noteworthy because of an introductory quotation from Christopher Alexander;
|
||||
Brinch Hansen was years ahead of others in recognizing pattern concepts
|
||||
applied to software, too.</para>
|
||||
</biblioentry>
|
||||
<biblioentry id="threads.bib.Butenhof97">
|
||||
<abbrev id="threads.bib.Butenhof97.abbrev">Butenhof97</abbrev>
|
||||
<title>
|
||||
<ulink url="http://cseng.aw.com/book/0,3828,0201633922,00.html"
|
||||
>Programming with POSIX Threads </ulink>
|
||||
</title>
|
||||
<author>
|
||||
<firstname>David</firstname>
|
||||
<othername>R.</othername>
|
||||
<surname>Butenhof</surname>
|
||||
</author>
|
||||
<publisher>Addison-Wesley</publisher>
|
||||
<copyright><year>1997</year></copyright>
|
||||
<isbn>ISNB: 0-201-63392-2</isbn>
|
||||
<para>This is a very readable explanation of threads and how to use
|
||||
them. Many of the insights given apply to all multithreaded programming, not
|
||||
just POSIX Threads</para>
|
||||
</biblioentry>
|
||||
<biblioentry id="threads.bib.Hoare74">
|
||||
<abbrev id="threads.bib.Hoare74.abbrev">Hoare74</abbrev>
|
||||
<biblioset relation="journal">
|
||||
<title>Communications of the ACM</title>
|
||||
<volumenum>Vol. 17</volumenum>
|
||||
<issuenum>No. 10</issuenum>
|
||||
<date>October, 1974</date>
|
||||
</biblioset>
|
||||
<biblioset relation="article">
|
||||
<title>
|
||||
<ulink url=" http://www.acm.org/classics/feb96/"
|
||||
>Monitors: An Operating System Structuring Concept</ulink>
|
||||
</title>
|
||||
<author>
|
||||
<firstname>C.A.R.</firstname>
|
||||
<surname>Hoare</surname>
|
||||
</author>
|
||||
<pagenums>549-557</pagenums>
|
||||
</biblioset>
|
||||
<para>Hoare and Brinch Hansen's work on Monitors is the basis for reliable
|
||||
multithreading patterns. This is one of the most often referenced papers in
|
||||
all of computer science, and with good reason.</para>
|
||||
</biblioentry>
|
||||
<biblioentry id="threads.bib.ISO98">
|
||||
<abbrev id="threads.bib.ISO98.abbrev">ISO98</abbrev>
|
||||
<title>
|
||||
<ulink url="http://www.ansi.org">Programming Language C++</ulink>
|
||||
</title>
|
||||
<orgname>ISO/IEC</orgname>
|
||||
<releaseinfo>14882:1998(E)</releaseinfo>
|
||||
<para>This is the official C++ Standards document. Available from the ANSI
|
||||
(American National Standards Institute) Electronic Standards Store.</para>
|
||||
</biblioentry>
|
||||
<biblioentry id="threads.bib.McDowellHelmbold89">
|
||||
<abbrev id="threads.bib.McDowellHelmbold89.abbrev">McDowellHelmbold89</abbrev>
|
||||
<biblioset relation="journal">
|
||||
<title>Communications of the ACM</title>
|
||||
<volumenum>Vol. 21</volumenum>
|
||||
<issuenum>No. 2</issuenum>
|
||||
<date>December, 1989</date>
|
||||
</biblioset>
|
||||
<biblioset>
|
||||
<author>
|
||||
<firstname>Charles</firstname>
|
||||
<othername>E.</othername>
|
||||
<surname>McDowell</surname>
|
||||
</author>
|
||||
<author>
|
||||
<firstname>David</firstname>
|
||||
<othername>P.</othername>
|
||||
<surname>Helmbold</surname>
|
||||
</author>
|
||||
<title>
|
||||
<ulink
|
||||
url="http://www.acm.org/pubs/citations/journals/surveys/1989-21-4/p593-mcdowell/"
|
||||
>Debugging Concurrent Programs</ulink>
|
||||
</title>
|
||||
</biblioset>
|
||||
<para>Identifies many of the unique failure modes and debugging difficulties
|
||||
associated with concurrent programs.</para>
|
||||
</biblioentry>
|
||||
<biblioentry id="threads.bib.SchmidtPyarali">
|
||||
<abbrev id="threads.bib.SchmidtPyarali.abbrev">SchmidtPyarali</abbrev>
|
||||
<title>
|
||||
<ulink url="http://www.cs.wustl.edu/~schmidt/win32-cv-1.html8"
|
||||
>Strategies for Implementing POSIX Condition Variables on Win32</ulink>
|
||||
</title>
|
||||
<authorgroup>
|
||||
<author>
|
||||
<firstname>Douglas</firstname>
|
||||
<othername>C.</othername>
|
||||
<surname>Schmidt</surname>
|
||||
</author>
|
||||
<author>
|
||||
<firstname>Irfan</firstname>
|
||||
<surname>Pyarali</surname>
|
||||
</author>
|
||||
</authorgroup>
|
||||
<orgname>Department of Computer Science, Washington University, St. Louis,
|
||||
Missouri</orgname>
|
||||
<para>Rationale for understanding &Boost.Threads; condition
|
||||
variables. Note that Alexander Terekhov found some bugs in the
|
||||
implementation given in this article, so pthreads-win32 and &Boost.Threads;
|
||||
are even more complicated yet.</para>
|
||||
</biblioentry>
|
||||
<biblioentry id="threads.bib.SchmidtStalRohnertBuschmann">
|
||||
<abbrev
|
||||
id="threads.bib.SchmidtStalRohnertBuschmann.abbrev">SchmidtStalRohnertBuschmann</abbrev>
|
||||
<title>
|
||||
<ulink
|
||||
url="http://www.wiley.com/Corporate/Website/Objects/Products/0,9049,104671,00.html"
|
||||
>Pattern-Oriented Architecture Volume 2</ulink>
|
||||
</title>
|
||||
<subtitle>Patterns for Concurrent and Networked Objects</subtitle>
|
||||
<titleabbrev>POSA2</titleabbrev>
|
||||
<authorgroup>
|
||||
<author>
|
||||
<firstname>Douglas</firstname>
|
||||
<othername>C.</othername>
|
||||
<surname>Schmidt</surname>
|
||||
</author>
|
||||
<author>
|
||||
<firstname>Michael</firstname>
|
||||
<lastname>Stal</lastname>
|
||||
</author>
|
||||
<author>
|
||||
<firstname>Hans</firstname>
|
||||
<surname>Rohnert</surname>
|
||||
</author>
|
||||
<author>
|
||||
<firstname>Frank</firstname>
|
||||
<surname>Buschmann</surname>
|
||||
</author>
|
||||
</authorgroup>
|
||||
<publisher>Wiley</publisher>
|
||||
<copyright><year>2000</year></copyright>
|
||||
<para>This is a very good explanation of how to apply several patterns
|
||||
useful for concurrent programming. Among the patterns documented is the
|
||||
Monitor Pattern mentioned frequently in the &Boost.Threads;
|
||||
documentation.</para>
|
||||
</biblioentry>
|
||||
<biblioentry id="threads.bib.Stroustrup">
|
||||
<abbrev id="threads.bib.Stroustrup.abbrev">Stroustrup</abbrev>
|
||||
<title>
|
||||
<ulink url="http://cseng.aw.com/book/0,3828,0201700735,00.html"
|
||||
>The C++ Programming Language</ulink>
|
||||
</title>
|
||||
<edition>Special Edition</edition>
|
||||
<publisher>Addison-Wesley</publisher>
|
||||
<copyright><year>2000</year></copyright>
|
||||
<isbn>ISBN: 0-201-70073-5</isbn>
|
||||
<para>The first book a C++ programmer should own. Note that the 3rd edition
|
||||
(and subsequent editions like the Special Edition) has been rewritten to
|
||||
cover the ISO standard language and library.</para>
|
||||
</biblioentry>
|
||||
</bibliography>
|
||||
58
doc/build.xml
Normal file
58
doc/build.xml
Normal file
@@ -0,0 +1,58 @@
|
||||
<?xml version="1.0" encoding="utf-8" ?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<section id="thread.build" last-revision="$Date$">
|
||||
<title>Build</title>
|
||||
<para>
|
||||
How you build the &Boost.Threads; libraries, and how you build your own applications
|
||||
that use those libraries, are some of the most frequently asked questions. Build
|
||||
processes are difficult to deal with in a portable manner. That's one reason
|
||||
why &Boost.Threads; makes use of &Boost.Build;.
|
||||
In general you should refer to the documentation for &Boost.Build;.
|
||||
This document will only supply you with some simple usage examples for how to
|
||||
use <emphasis>bjam</emphasis> to build and test &Boost.Threads;. In addition, this document
|
||||
will try to explain the build requirements so that users may create their own
|
||||
build processes (for instance, create an IDE specific project), both for building
|
||||
and testing &Boost.Threads;, as well as for building their own projects using
|
||||
&Boost.Threads;.
|
||||
</para>
|
||||
<section id="thread.build.building">
|
||||
<title>Building the &Boost.Threads; Libraries</title>
|
||||
<para>
|
||||
To build the &Boost.Threads; libraries using &Boost.Build;, simply change to the
|
||||
directory <emphasis>boost_root</emphasis>/libs/thread/build and execute the command:
|
||||
<programlisting>bjam -sTOOLS=<emphasis>toolset</emphasis></programlisting>
|
||||
This will create the debug and the release builds of the &Boost.Threads; library.
|
||||
<note>Invoking the above command in <emphasis>boost_root</emphasis> will build all of
|
||||
the Boost distribution, including &Boost.Threads;.</note>
|
||||
</para>
|
||||
<para>
|
||||
The Jamfile supplied with &Boost.Threads; produces a dynamic link library named
|
||||
<emphasis>boost_thread{build-specific-tags}.{extension}</emphasis>, where the build-specific
|
||||
tags indicate the toolset used to build the library, whether it's a debug or release
|
||||
build, what version of Boost was used, etc.; and the extension is the appropriate extension
|
||||
for a dynamic link library for the platform for which &Boost.Threads; is being built.
|
||||
For instance, a debug library built for Win32 with VC++ 7.1 using Boost 1.31 would
|
||||
be named <emphasis>boost_thread-vc71-mt-gd-1_31.dll</emphasis>.
|
||||
</para>
|
||||
<para>
|
||||
The source files that are used to create the &Boost.Threads; library
|
||||
are all of the *.cpp files found in <emphasis>boost_root</emphasis>/libs/thread/src.
|
||||
These need to be built with the compiler's and linker's multi-threading support enabled.
|
||||
If you want to create your own build solution you'll have to follow these same
|
||||
guidelines. One of the most frequently reported problems when trying to do this
|
||||
occurs from not enabling the compiler's and linker's support for multi-threading.
|
||||
</para>
|
||||
</section>
|
||||
<section id="thread.build.testing">
|
||||
<title>Testing the &Boost.Threads; Libraries</title>
|
||||
<para>
|
||||
To test the &Boost.Threads; libraries using &Boost.Build;, simply change to the
|
||||
directory <emphasis>boost_root</emphasis>/libs/thread/test and execute the command:
|
||||
<programlisting>bjam -sTOOLS=<emphasis>toolset</emphasis> test</programlisting>
|
||||
</para>
|
||||
</section>
|
||||
</section>
|
||||
2286
doc/concepts.xml
Normal file
2286
doc/concepts.xml
Normal file
File diff suppressed because it is too large
Load Diff
188
doc/condition-ref.xml
Normal file
188
doc/condition-ref.xml
Normal file
@@ -0,0 +1,188 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<header name="boost/thread/condition.hpp"
|
||||
last-revision="$Date$">
|
||||
<namespace name="boost">
|
||||
<class name="condition">
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<purpose>
|
||||
<para>An object of class <classname>condition</classname> is a
|
||||
synchronization primitive used to cause a thread to wait until a
|
||||
particular shared-data condition (or time) is met.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>A <classname>condition</classname> object is always used in
|
||||
conjunction with a <link linkend="threads.concepts.mutexes">mutex</link>
|
||||
object (an object whose type is a model of a <link
|
||||
linkend="threads.concepts.Mutex">Mutex</link> or one of its
|
||||
refinements). The mutex object must be locked prior to waiting on the
|
||||
condition, which is verified by passing a lock object (an object whose
|
||||
type is a model of <link linkend="threads.concepts.Lock">Lock</link> or
|
||||
one of its refinements) to the <classname>condition</classname> object's
|
||||
wait functions. Upon blocking on the <classname>condition</classname>
|
||||
object, the thread unlocks the mutex object. When the thread returns
|
||||
from a call to one of the <classname>condition</classname> object's wait
|
||||
functions the mutex object is again locked. The tricky unlock/lock
|
||||
sequence is performed automatically by the
|
||||
<classname>condition</classname> object's wait functions.</para>
|
||||
<para>The <classname>condition</classname> type is often used to
|
||||
implement the Monitor Object and other important patterns (see
|
||||
&cite.SchmidtStalRohnertBuschmann; and &cite.Hoare74;). Monitors are one
|
||||
of the most important patterns for creating reliable multithreaded
|
||||
programs.</para>
|
||||
<para>See <xref linkend="threads.glossary"/> for definitions of <link
|
||||
linkend="threads.glossary.thread-state">thread states</link>
|
||||
blocked and ready. Note that "waiting" is a synonym for blocked.</para>
|
||||
</description>
|
||||
|
||||
<constructor>
|
||||
<effects><simpara>Constructs a <classname>condition</classname>
|
||||
object.</simpara></effects>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects><simpara>Destroys <code>*this</code>.</simpara></effects>
|
||||
</destructor>
|
||||
|
||||
<method-group name="notification">
|
||||
<method name="notify_one">
|
||||
<type>void</type>
|
||||
<effects><simpara>If there is a thread waiting on <code>*this</code>,
|
||||
change that thread's state to ready. Otherwise there is no
|
||||
effect.</simpara></effects>
|
||||
<notes><simpara>If more than one thread is waiting on <code>*this</code>,
|
||||
it is unspecified which is made ready. After returning to a ready
|
||||
state the notified thread must still acquire the mutex again (which
|
||||
occurs within the call to one of the <classname>condition</classname>
|
||||
object's wait functions.)</simpara></notes>
|
||||
</method>
|
||||
|
||||
<method name="notify_all">
|
||||
<type>void</type>
|
||||
<effects><simpara>Change the state of all threads waiting on
|
||||
<code>*this</code> to ready. If there are no waiting threads,
|
||||
<code>notify_all()</code> has no effect.</simpara></effects>
|
||||
</method>
|
||||
</method-group>
|
||||
|
||||
<method-group name="waiting">
|
||||
<method name="wait">
|
||||
<template>
|
||||
<template-type-parameter name="ScopedLock"/>
|
||||
</template>
|
||||
|
||||
<type>void</type>
|
||||
|
||||
<parameter name="lock">
|
||||
<paramtype>ScopedLock&</paramtype>
|
||||
</parameter>
|
||||
|
||||
<requires><simpara><code>ScopedLock</code> meets the <link
|
||||
linkend="threads.concepts.ScopedLock">ScopedLock</link>
|
||||
requirements.</simpara></requires>
|
||||
<effects><simpara>Releases the lock on the <link
|
||||
linkend="threads.concepts.mutexes">mutex object</link>
|
||||
associated with <code>lock</code>, blocks the current thread of execution
|
||||
until readied by a call to <code>this->notify_one()</code>
|
||||
or<code> this->notify_all()</code>, and then reacquires the
|
||||
lock.</simpara></effects>
|
||||
<throws><simpara><classname>lock_error</classname> if
|
||||
<code>!lock.locked()</code></simpara></throws>
|
||||
</method>
|
||||
|
||||
<method name="wait">
|
||||
<template>
|
||||
<template-type-parameter name="ScopedLock"/>
|
||||
<template-type-parameter name="Pred"/>
|
||||
</template>
|
||||
|
||||
<type>void</type>
|
||||
|
||||
<parameter name="lock">
|
||||
<paramtype>ScopedLock&</paramtype>
|
||||
</parameter>
|
||||
|
||||
<parameter name="pred">
|
||||
<paramtype>Pred</paramtype>
|
||||
</parameter>
|
||||
|
||||
<requires><simpara><code>ScopedLock</code> meets the <link
|
||||
linkend="threads.concepts.ScopedLock">ScopedLock</link>
|
||||
requirements and the return from <code>pred()</code> is
|
||||
convertible to <code>bool</code>.</simpara></requires>
|
||||
<effects><simpara>As if: <code>while (!pred())
|
||||
wait(lock)</code></simpara></effects>
|
||||
<throws><simpara><classname>lock_error</classname> if
|
||||
<code>!lock.locked()</code></simpara></throws>
|
||||
</method>
|
||||
|
||||
<method name="timed_wait">
|
||||
<template>
|
||||
<template-type-parameter name="ScopedLock"/>
|
||||
</template>
|
||||
|
||||
<type>bool</type>
|
||||
|
||||
<parameter name="lock">
|
||||
<paramtype>ScopedLock&</paramtype>
|
||||
</parameter>
|
||||
|
||||
<parameter name="xt">
|
||||
<paramtype>const <classname>boost::xtime</classname>&</paramtype>
|
||||
</parameter>
|
||||
|
||||
<requires><simpara><code>ScopedLock</code> meets the <link
|
||||
linkend="threads.concepts.ScopedLock">ScopedLock</link>
|
||||
requirements.</simpara></requires>
|
||||
<effects><simpara>Releases the lock on the <link
|
||||
linkend="threads.concepts.mutexes">mutex object</link>
|
||||
associated with <code>lock</code>, blocks the current thread of execution
|
||||
until readied by a call to <code>this->notify_one()</code>
|
||||
or<code> this->notify_all()</code>, or until time <code>xt</code>
|
||||
is reached, and then reacquires the lock.</simpara></effects>
|
||||
<returns><simpara><code>false</code> if time <code>xt</code> is reached,
|
||||
otherwise <code>true</code>.</simpara></returns>
|
||||
<throws><simpara><classname>lock_error</classname> if
|
||||
<code>!lock.locked()</code></simpara></throws>
|
||||
</method>
|
||||
|
||||
<method name="timed_wait">
|
||||
<template>
|
||||
<template-type-parameter name="ScopedLock"/>
|
||||
<template-type-parameter name="Pred"/>
|
||||
</template>
|
||||
|
||||
<type>bool</type>
|
||||
|
||||
<parameter name="lock">
|
||||
<paramtype>ScopedLock&</paramtype>
|
||||
</parameter>
|
||||
|
||||
<parameter name="pred">
|
||||
<paramtype>Pred</paramtype>
|
||||
</parameter>
|
||||
|
||||
<requires><simpara><code>ScopedLock</code> meets the <link
|
||||
linkend="threads.concepts.ScopedLock">ScopedLock</link>
|
||||
requirements and the return from <code>pred()</code> is
|
||||
convertible to <code>bool</code>.</simpara></requires>
|
||||
<effects><simpara>As if: <code>while (!pred()) { if (!timed_wait(lock,
|
||||
xt)) return false; } return true;</code></simpara></effects>
|
||||
<returns><simpara><code>false</code> if <code>xt</code> is reached,
|
||||
otherwise <code>true</code>.</simpara></returns>
|
||||
<throws><simpara><classname>lock_error</classname> if
|
||||
<code>!lock.locked()</code></simpara></throws>
|
||||
</method>
|
||||
</method-group>
|
||||
</class>
|
||||
</namespace>
|
||||
</header>
|
||||
92
doc/configuration.xml
Normal file
92
doc/configuration.xml
Normal file
@@ -0,0 +1,92 @@
|
||||
<?xml version="1.0" encoding="utf-8" ?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<section id="thread.configuration" last-revision="$Date$">
|
||||
<title>Configuration</title>
|
||||
<para>&Boost.Threads; uses several configuration macros in <boost/config.hpp>,
|
||||
as well as configuration macros meant to be supplied by the application. These
|
||||
macros are documented here.
|
||||
</para>
|
||||
<section id="thread.configuration.public">
|
||||
<title>Library Defined Public Macros</title>
|
||||
<para>
|
||||
These macros are defined by &Boost.Threads; but are expected to be used
|
||||
by application code.
|
||||
</para>
|
||||
<informaltable>
|
||||
<tgroup cols="2">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Macro</entry>
|
||||
<entry>Meaning</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>BOOST_HAS_THREADS</entry>
|
||||
<entry>
|
||||
Indicates that threading support is available. This means both that there
|
||||
is a platform specific implementation for &Boost.Threads; and that
|
||||
threading support has been enabled in a platform specific manner. For instance,
|
||||
on the Win32 platform there's an implementation for &Boost.Threads;
|
||||
but unless the program is compiled against one of the multithreading runtimes
|
||||
(often determined by the compiler predefining the macro _MT) the BOOST_HAS_THREADS
|
||||
macro remains undefined.
|
||||
</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</section>
|
||||
<section id="thread.configuration.implementation">
|
||||
<title>Library Defined Implementation Macros</title>
|
||||
<para>
|
||||
These macros are defined by &Boost.Threads; and are implementation details
|
||||
of interest only to implementors.
|
||||
</para>
|
||||
<informaltable>
|
||||
<tgroup cols="2">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Macro</entry>
|
||||
<entry>Meaning</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>BOOST_HAS_WINTHREADS</entry>
|
||||
<entry>
|
||||
Indicates that the platform has the Microsoft Win32 threading libraries,
|
||||
and that they should be used to implement &Boost.Threads;.
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>BOOST_HAS_PTHREADS</entry>
|
||||
<entry>
|
||||
Indicates that the platform has the POSIX pthreads libraries, and that
|
||||
they should be used to implement &Boost.Threads;.
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>BOOST_HAS_FTIME</entry>
|
||||
<entry>
|
||||
Indicates that the implementation should use GetSystemTimeAsFileTime()
|
||||
and the FILETIME type to calculate the current time. This is an implementation
|
||||
detail used by boost::detail::getcurtime().
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>BOOST_HAS_GETTTIMEOFDAY</entry>
|
||||
<entry>
|
||||
Indicates that the implementation should use gettimeofday() to calculate
|
||||
the current time. This is an implementation detail used by boost::detail::getcurtime().
|
||||
</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</section>
|
||||
</section>
|
||||
155
doc/design.xml
Normal file
155
doc/design.xml
Normal file
@@ -0,0 +1,155 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<section id="threads.design" last-revision="$Date$">
|
||||
<title>Design</title>
|
||||
<para>With client/server and three-tier architectures becoming common place
|
||||
in today's world, it's becoming increasingly important for programs to be
|
||||
able to handle parallel processing. Modern day operating systems usually
|
||||
provide some support for this through native thread APIs. Unfortunately,
|
||||
writing portable code that makes use of parallel processing in C++ is made
|
||||
very difficult by a lack of a standard interface for these native APIs.
|
||||
Further, these APIs are almost universally C APIs and fail to take
|
||||
advantage of C++'s strengths, or to address concepts unique to C++, such as
|
||||
exceptions.</para>
|
||||
<para>The &Boost.Threads; library is an attempt to define a portable interface
|
||||
for writing parallel processes in C++.</para>
|
||||
<section id="threads.design.goals">
|
||||
<title>Goals</title>
|
||||
<para>The &Boost.Threads; library has several goals that should help to set
|
||||
it apart from other solutions. These goals are listed in order of precedence
|
||||
with full descriptions below.
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term>Portability</term>
|
||||
<listitem>
|
||||
<para>&Boost.Threads; was designed to be highly portable. The goal is
|
||||
for the interface to be easily implemented on any platform that
|
||||
supports threads, and possibly even on platforms without native thread
|
||||
support.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term>Safety</term>
|
||||
<listitem>
|
||||
<para>&Boost.Threads; was designed to be as safe as possible. Writing
|
||||
<link linkend="threads.glossary.thread-safe">thread-safe</link>
|
||||
code is very difficult and successful libraries must strive to
|
||||
insulate the programmer from dangerous constructs as much as
|
||||
possible. This is accomplished in several ways:
|
||||
<itemizedlist>
|
||||
<listitem>
|
||||
<para>C++ language features are used to make correct usage easy
|
||||
(if possible) and error-prone usage impossible or at least more
|
||||
difficult. For example, see the <link
|
||||
linkend="threads.concepts.Mutex">Mutex</link> and <link
|
||||
linkend="threads.concepts.Lock">Lock</link> designs, and note
|
||||
how they interact.</para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para>Certain traditional concurrent programming features are
|
||||
considered so error-prone that they are not provided at all. For
|
||||
example, see <xref linkend="threads.rationale.events" />.</para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para>Dangerous features, or features which may be misused, are
|
||||
identified as such in the documentation to make users aware of
|
||||
potential pitfalls.</para>
|
||||
</listitem>
|
||||
</itemizedlist></para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term>Flexibility</term>
|
||||
<listitem>
|
||||
<para>&Boost.Threads; was designed to be flexible. This goal is often
|
||||
at odds with <emphasis>safety</emphasis>. When functionality might be
|
||||
compromised by the desire to keep the interface safe, &Boost.Threads;
|
||||
has been designed to provide the functionality, but to make it's use
|
||||
prohibitive for general use. In other words, the interfaces have been
|
||||
designed such that it's usually obvious when something is unsafe, and
|
||||
the documentation is written to explain why.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term>Efficiency</term>
|
||||
<listitem>
|
||||
<para>&Boost.Threads; was designed to be as efficient as
|
||||
possible. When building a library on top of another library there is
|
||||
always a danger that the result will be so much slower than the
|
||||
"native" API that programmers are inclined to ignore the higher level
|
||||
API. &Boost.Threads; was designed to minimize the chances of this
|
||||
occurring. The interfaces have been crafted to allow an implementation
|
||||
the greatest chance of being as efficient as possible. This goal is
|
||||
often at odds with the goal for <emphasis>safety</emphasis>. Every
|
||||
effort was made to ensure efficient implementations, but when in
|
||||
conflict <emphasis>safety</emphasis> has always taken
|
||||
precedence.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist></para>
|
||||
</section>
|
||||
<section>
|
||||
<title>Iterative Phases</title>
|
||||
<para>Another goal of &Boost.Threads; was to take a dynamic, iterative
|
||||
approach in its development. The computing industry is still exploring the
|
||||
concepts of parallel programming. Most thread libraries supply only simple
|
||||
primitive concepts for thread synchronization. These concepts are very
|
||||
simple, but it is very difficult to use them safely or to provide formal
|
||||
proofs for constructs built on top of them. There has been a lot of research
|
||||
into other concepts, such as in "Communicating Sequential Processes."
|
||||
&Boost.Threads; was designed in iterative steps, with each step providing
|
||||
the building blocks necessary for the next step and giving the researcher
|
||||
the tools necessary to explore new concepts in a portable manner.</para>
|
||||
<para>Given the goal of following a dynamic, iterative approach
|
||||
&Boost.Threads; shall go through several growth cycles. Each phase in its
|
||||
development shall be roughly documented here.</para>
|
||||
</section>
|
||||
<section>
|
||||
<title>Phase 1, Synchronization Primitives</title>
|
||||
<para>Boost is all about providing high quality libraries with
|
||||
implementations for many platforms. Unfortunately, there's a big problem
|
||||
faced by developers wishing to supply such high quality libraries, namely
|
||||
thread-safety. The C++ standard doesn't address threads at all, but real
|
||||
world programs often make use of native threading support. A portable
|
||||
library that doesn't address the issue of thread-safety is therefore not
|
||||
much help to a programmer who wants to use the library in his multithreaded
|
||||
application. So there's a very great need for portable primitives that will
|
||||
allow the library developer to create <link
|
||||
linkend="threads.glossary.thread-safe">thread-safe</link>
|
||||
implementations. This need far out weighs the need for portable methods to
|
||||
create and manage threads.</para>
|
||||
<para>Because of this need, the first phase of &Boost.Threads; focuses
|
||||
solely on providing portable primitive concepts for thread
|
||||
synchronization. Types provided in this phase include the
|
||||
<classname>boost::mutex</classname>,
|
||||
<classname>boost::try_mutex</classname>,
|
||||
<classname>boost::timed_mutex</classname>,
|
||||
<classname>boost::recursive_mutex</classname>,
|
||||
<classname>boost::recursive_try_mutex</classname>,
|
||||
<classname>boost::recursive_timed_mutex</classname>, and
|
||||
<classname>boost::lock_error</classname>. These are considered the "core"
|
||||
synchronization primitives, though there are others that will be added in
|
||||
later phases.</para>
|
||||
</section>
|
||||
<section id="threads.design.phase2">
|
||||
<title>Phase 2, Thread Management and Thread Specific Storage</title>
|
||||
<para>This phase addresses the creation and management of threads and
|
||||
provides a mechanism for thread specific storage (data associated with a
|
||||
thread instance). Thread management is a tricky issue in C++, so this
|
||||
phase addresses only the basic needs of multithreaded program. Later
|
||||
phases are likely to add additional functionality in this area. This
|
||||
phase of &Boost.Threads; adds the <classname>boost::thread</classname> and
|
||||
<classname>boost::thread_specific_ptr</classname> types. With these
|
||||
additions the &Boost.Threads; library can be considered minimal but
|
||||
complete.</para>
|
||||
</section>
|
||||
<section>
|
||||
<title>The Next Phase</title>
|
||||
<para>The next phase will address more advanced synchronization concepts,
|
||||
such as read/write mutexes and barriers.</para>
|
||||
</section>
|
||||
</section>
|
||||
26
doc/entities.xml
Normal file
26
doc/entities.xml
Normal file
@@ -0,0 +1,26 @@
|
||||
<!ENTITY Boost.Threads "<emphasis role='bold'>Boost.Threads</emphasis>">
|
||||
<!ENTITY Boost.Build "<emphasis role='bold'>Boost.Build</emphasis>">
|
||||
<!ENTITY cite.AndrewsSchneider83 "<citation><xref
|
||||
linkend='threads.bib.AndrewsSchneider83'
|
||||
endterm='threads.bib.AndrewsSchneider83.abbrev'/></citation>">
|
||||
<!ENTITY cite.Boost "<citation><xref linkend='threads.bib.Boost'
|
||||
endterm='threads.bib.Boost.abbrev'/></citation>">
|
||||
<!ENTITY cite.Hansen73 "<citation><xref linkend='threads.bib.Hansen73'
|
||||
endterm='threads.bib.Hansen73.abbrev'/></citation>">
|
||||
<!ENTITY cite.Butenhof97 "<citation><xref linkend='threads.bib.Butenhof97'
|
||||
endterm='threads.bib.Butenhof97.abbrev'/></citation>">
|
||||
<!ENTITY cite.Hoare74 "<citation><xref linkend='threads.bib.Hoare74'
|
||||
endterm='threads.bib.Hoare74.abbrev'/></citation>">
|
||||
<!ENTITY cite.ISO98 "<citation><xref linkend='threads.bib.ISO98'
|
||||
endterm='threads.bib.ISO98.abbrev'/></citation>">
|
||||
<!ENTITY cite.McDowellHelmbold89 "<citation><xref
|
||||
linkend='threads.bib.McDowellHelmbold89'
|
||||
endterm='threads.bib.McDowellHelmbold89.abbrev'/></citation>">
|
||||
<!ENTITY cite.SchmidtPyarali "<citation><xref
|
||||
linkend='threads.bib.SchmidtPyarali'
|
||||
endterm='threads.bib.SchmidtPyarali.abbrev'/></citation>">
|
||||
<!ENTITY cite.SchmidtStalRohnertBuschmann "<citation><xref
|
||||
linkend='threads.bib.SchmidtStalRohnertBuschmann'
|
||||
endterm='threads.bib.SchmidtStalRohnertBuschmann.abbrev'/></citation>">
|
||||
<!ENTITY cite.Stroustrup "<citation><xref linkend='threads.bib.Stroustrup'
|
||||
endterm='threads.bib.Stroustrup.abbrev'/></citation>">
|
||||
58
doc/exceptions-ref.xml
Normal file
58
doc/exceptions-ref.xml
Normal file
@@ -0,0 +1,58 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<header name="boost/thread/exceptions.hpp"
|
||||
last-revision="$Date$">
|
||||
<namespace name="boost">
|
||||
<class name="lock_error">
|
||||
<purpose>
|
||||
<simpara>The lock_error class defines an exception type thrown
|
||||
to indicate a locking related error has been detected.</simpara>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<simpara>Examples of errors indicated by a lock_error exception
|
||||
include a lock operation which can be determined to result in a
|
||||
deadlock, or unlock operations attempted by a thread that does
|
||||
not own the lock.</simpara>
|
||||
</description>
|
||||
|
||||
<inherit access="public">
|
||||
<type><classname>std::logical_error</classname></type>
|
||||
</inherit>
|
||||
|
||||
<constructor>
|
||||
<effects><simpara>Constructs a <code>lock_error</code> object.
|
||||
</simpara></effects>
|
||||
</constructor>
|
||||
</class>
|
||||
|
||||
<class name="thread_resource_error">
|
||||
<purpose>
|
||||
<simpara>The <classname>thread_resource_error</classname> class
|
||||
defines an exception type that is thrown by constructors in the
|
||||
&Boost.Threads; library when thread-related resources can not be
|
||||
acquired.</simpara>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<simpara><classname>thread_resource_error</classname> is used
|
||||
only when thread-related resources cannot be acquired; memory
|
||||
allocation failures are indicated by
|
||||
<classname>std::bad_alloc</classname>.</simpara>
|
||||
</description>
|
||||
|
||||
<inherit access="public">
|
||||
<type><classname>std::runtime_error</classname></type>
|
||||
</inherit>
|
||||
|
||||
<constructor>
|
||||
<effects><simpara>Constructs a <code>thread_resource_error</code>
|
||||
object.</simpara></effects>
|
||||
</constructor>
|
||||
</class>
|
||||
</namespace>
|
||||
</header>
|
||||
210
doc/faq.xml
Normal file
210
doc/faq.xml
Normal file
@@ -0,0 +1,210 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<section id="threads.faq" last-revision="$Date$">
|
||||
<title>Frequently Asked Questions</title>
|
||||
<qandaset>
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para>Are lock objects <link
|
||||
linkend="threads.glossary.thread-safe">thread safe</link>?</para>
|
||||
</question>
|
||||
<answer>
|
||||
<para><emphasis role="bold">No!</emphasis> Lock objects are not meant to
|
||||
be shared between threads. They are meant to be short-lived objects
|
||||
created on automatic storage within a code block. Any other usage is
|
||||
just likely to lead to errors and won't really be of actual benefit anyway.
|
||||
Share <link linkend="threads.concepts.mutexes">Mutexes</link>, not
|
||||
Locks. For more information see the <link
|
||||
linkend="threads.rationale.locks">rationale</link> behind the
|
||||
design for lock objects.</para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para>Why was &Boost.Threads; modeled after (specific library
|
||||
name)?</para>
|
||||
</question>
|
||||
<answer>
|
||||
<para>It wasn't. &Boost.Threads; was designed from scratch. Extensive
|
||||
design discussions involved numerous people representing a wide range of
|
||||
experience across many platforms. To ensure portability, the initial
|
||||
implements were done in parallel using POSIX Threads and the Win32
|
||||
threading API. But the &Boost.Threads; design is very much in the spirit
|
||||
of C++, and thus doesn't model such C based APIs.</para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para>Why wasn't &Boost.Threads; modeled after (specific library
|
||||
name)?</para>
|
||||
</question>
|
||||
<answer>
|
||||
<para>Existing C++ libraries either seemed dangerous (often failing to
|
||||
take advantage of prior art to reduce errors) or had excessive
|
||||
dependencies on library components unrelated to threading. Existing C
|
||||
libraries couldn't meet our C++ requirements, and were also missing
|
||||
certain features. For instance, the WIN32 thread API lacks condition
|
||||
variables, even though these are critical for the important Monitor
|
||||
pattern &cite.SchmidtStalRohnertBuschmann;.</para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para>Why do <link linkend="threads.concepts.mutexes">Mutexes</link>
|
||||
have noncopyable semantics?</para>
|
||||
</question>
|
||||
<answer>
|
||||
<para>To ensure that <link
|
||||
linkend="threads.glossary.deadlock">deadlocks</link> don't occur. The
|
||||
only logical form of copy would be to use some sort of shallow copy
|
||||
semantics in which multiple mutex objects could refer to the same mutex
|
||||
state. This means that if ObjA has a mutex object as part of its state
|
||||
and ObjB is copy constructed from it, then when ObjB::foo() locks the
|
||||
mutex it has effectively locked ObjA as well. This behavior can result
|
||||
in deadlock. Other copy semantics result in similar problems (if you
|
||||
think you can prove this to be wrong then supply us with an alternative
|
||||
and we'll reconsider).</para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para>How can you prevent <link
|
||||
linkend="threads.glossary.deadlock">deadlock</link> from occurring when
|
||||
a thread must lock multiple mutexes?</para>
|
||||
</question>
|
||||
<answer>
|
||||
<para>Always lock them in the same order. One easy way of doing this is
|
||||
to use each mutex's address to determine the order in which they are
|
||||
locked. A future &Boost.Threads; concept may wrap this pattern up in a
|
||||
reusable class.</para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para>Don't noncopyable <link
|
||||
linkend="threads.concepts.mutexes">Mutex</link> semantics mean that a
|
||||
class with a mutex member will be noncopyable as well?</para>
|
||||
</question>
|
||||
<answer>
|
||||
<para>No, but what it does mean is that the compiler can't generate a
|
||||
copy constructor and assignment operator, so they will have to be coded
|
||||
explicitly. This is a <emphasis role="bold">good thing</emphasis>,
|
||||
however, since the compiler generated operations would not be <link
|
||||
linkend="threads.glossary.thread-safe">thread-safe</link>. The following
|
||||
is a simple example of a class with copyable semantics and internal
|
||||
synchronization through a mutex member.</para>
|
||||
<programlisting>
|
||||
class counter
|
||||
{
|
||||
public:
|
||||
// Doesn't need synchronization since there can be no references to *this
|
||||
// until after it's constructed!
|
||||
explicit counter(int initial_value)
|
||||
: m_value(initial_value)
|
||||
{
|
||||
}
|
||||
// We only need to synchronize other for the same reason we don't have to
|
||||
// synchronize on construction!
|
||||
counter(const counter& other)
|
||||
{
|
||||
boost::mutex::scoped_lock scoped_lock(other.m_mutex);
|
||||
m_value = other.m_value;
|
||||
}
|
||||
// For assignment we need to synchronize both objects!
|
||||
const counter& operator=(const counter& other)
|
||||
{
|
||||
if (this == &other)
|
||||
return *this;
|
||||
boost::mutex::scoped_lock lock1(&m_mutex < &other.m_mutex ? m_mutex : other.m_mutex);
|
||||
boost::mutex::scoped_lock lock2(&m_mutex > &other.m_mutex ? m_mutex : other.m_mutex);
|
||||
m_value = other.m_value;
|
||||
return *this;
|
||||
}
|
||||
int value() const
|
||||
{
|
||||
boost::mutex::scoped_lock scoped_lock(m_mutex);
|
||||
return m_value;
|
||||
}
|
||||
int increment()
|
||||
{
|
||||
boost::mutex::scoped_lock scoped_lock(m_mutex);
|
||||
return ++m_value;
|
||||
}
|
||||
private:
|
||||
mutable boost::mutex m_mutex;
|
||||
int m_value;
|
||||
};
|
||||
</programlisting>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para>How can you lock a <link
|
||||
linkend="threads.concepts.mutexes">Mutex</link> member in a const member
|
||||
function, in order to implement the Monitor Pattern?</para>
|
||||
</question>
|
||||
<answer>
|
||||
<para>The Monitor Pattern &cite.SchmidtStalRohnertBuschmann; mutex
|
||||
should simply be declared as mutable. See the example code above. The
|
||||
internal state of mutex types could have been made mutable, with all
|
||||
lock calls made via const functions, but this does a poor job of
|
||||
documenting the actual semantics (and in fact would be incorrect since
|
||||
the logical state of a locked mutex clearly differs from the logical
|
||||
state of an unlocked mutex). Declaring a mutex member as mutable clearly
|
||||
documents the intended semantics.</para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para>Why supply <classname>boost::condition</classname> variables rather than
|
||||
event variables?</para>
|
||||
</question>
|
||||
<answer>
|
||||
<para>Condition variables result in user code much less prone to <link
|
||||
linkend="threads.glossary.race-condition">race conditions</link> than
|
||||
event variables. See <xref linkend="threads.rationale.events" />
|
||||
for analysis. Also see &cite.Hoare74; and &cite.SchmidtStalRohnertBuschmann;.
|
||||
</para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para>Why isn't thread cancellation or termination provided?</para>
|
||||
</question>
|
||||
<answer>
|
||||
<para>There's a valid need for thread termination, so at some point
|
||||
&Boost.Threads; probably will include it, but only after we can find a
|
||||
truly safe (and portable) mechanism for this concept.</para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para>Is it safe for threads to share automatic storage duration (stack)
|
||||
objects via pointers or references?</para>
|
||||
</question>
|
||||
<answer>
|
||||
<para>Only if you can guarantee that the lifetime of the stack object
|
||||
will not end while other threads might still access the object. Thus the
|
||||
safest practice is to avoid sharing stack objects, particularly in
|
||||
designs where threads are created and destroyed dynamically. Restrict
|
||||
sharing of stack objects to simple designs with very clear and
|
||||
unchanging function and thread lifetimes. (Suggested by Darryl
|
||||
Green).</para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
<qandaentry>
|
||||
<question>
|
||||
<para>Why has class semaphore disappeared?</para>
|
||||
</question>
|
||||
<answer>
|
||||
<para>Semaphore was removed as too error prone. The same effect can be
|
||||
achieved with greater safety by the combination of a mutex and a
|
||||
condition variable.</para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
</qandaset>
|
||||
</section>
|
||||
300
doc/glossary.xml
Normal file
300
doc/glossary.xml
Normal file
@@ -0,0 +1,300 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<glossary id="threads.glossary" last-revision="$Date$">
|
||||
<title>Glossary</title>
|
||||
<para>Definitions are given in terms of the C++ Standard
|
||||
&cite.ISO98;. References to the standard are in the form [1.2.3/4], which
|
||||
represents the section number, with the paragraph number following the
|
||||
"/".</para>
|
||||
<para>Because the definitions are written in something akin to "standardese",
|
||||
they can be difficult to understand. The intent isn't to confuse, but rather
|
||||
to clarify the additional requirements &Boost.Threads; places on a C++
|
||||
implementation as defined by the C++ Standard.</para>
|
||||
<glossentry id="threads.glossary.thread">
|
||||
<glossterm>Thread</glossterm>
|
||||
<glossdef>
|
||||
<para>Thread is short for "thread of execution". A thread of execution is
|
||||
an execution environment [1.9/7] within the execution environment of a C++
|
||||
program [1.9]. The main() function [3.6.1] of the program is the initial
|
||||
function of the initial thread. A program in a multithreading environment
|
||||
always has an initial thread even if the program explicitly creates no
|
||||
additional threads.</para>
|
||||
<para>Unless otherwise specified, each thread shares all aspects of its
|
||||
execution environment with other threads in the program. Shared aspects of
|
||||
the execution environment include, but are not limited to, the
|
||||
following:</para>
|
||||
<itemizedlist>
|
||||
<listitem><para>Static storage duration (static, extern) objects
|
||||
[3.7.1].</para></listitem>
|
||||
<listitem><para>Dynamic storage duration (heap) objects [3.7.3]. Thus
|
||||
each memory allocation will return a unique addresses, regardless of the
|
||||
thread making the allocation request.</para></listitem>
|
||||
<listitem><para>Automatic storage duration (stack) objects [3.7.2]
|
||||
accessed via pointer or reference from another thread.</para></listitem>
|
||||
<listitem><para>Resources provided by the operating system. For example,
|
||||
files.</para></listitem>
|
||||
<listitem><para>The program itself. In other words, each thread is
|
||||
executing some function of the same program, not a totally different
|
||||
program.</para></listitem>
|
||||
</itemizedlist>
|
||||
<para>Each thread has its own:</para>
|
||||
<itemizedlist>
|
||||
<listitem><para>Registers and current execution sequence (program
|
||||
counter) [1.9/5].</para></listitem>
|
||||
<listitem><para>Automatic storage duration (stack) objects
|
||||
[3.7.2].</para></listitem>
|
||||
</itemizedlist>
|
||||
</glossdef>
|
||||
</glossentry>
|
||||
<glossentry id="threads.glossary.thread-safe">
|
||||
<glossterm>Thread-safe</glossterm>
|
||||
<glossdef>
|
||||
<para>A program is thread-safe if it has no <link
|
||||
linkend="threads.glossary.race-condition">race conditions</link>, does
|
||||
not <link linkend="threads.glossary.deadlock">deadlock</link>, and has
|
||||
no <link linkend="threads.glossary.priority-failure">priority
|
||||
failures</link>.</para>
|
||||
<para>Note that thread-safety does not necessarily imply efficiency, and
|
||||
than while some thread-safety violations can be determined statically at
|
||||
compile time, many thread-safety errors can only only be detected at
|
||||
runtime.</para>
|
||||
</glossdef>
|
||||
</glossentry>
|
||||
<glossentry id="threads.glossary.thread-state">
|
||||
<glossterm>Thread State</glossterm>
|
||||
<glossdef>
|
||||
<para>During the lifetime of a thread, it shall be in one of the following
|
||||
states:</para>
|
||||
<table>
|
||||
<title>Thread States</title>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>State</entry>
|
||||
<entry>Description</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>Ready</entry>
|
||||
<entry>Ready to run, but waiting for a processor.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Running</entry>
|
||||
<entry>Currently executing on a processor. Zero or more threads
|
||||
may be running at any time, with a maximum equal to the number of
|
||||
processors.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Blocked</entry>
|
||||
<entry>Waiting for some resource other than a processor which is
|
||||
not currently available, or for the completion of calls to library
|
||||
functions [1.9/6]. The term "waiting" is synonymous with
|
||||
"blocked"</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Terminated</entry>
|
||||
<entry>Finished execution but not yet detached or joined.</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
<para>Thread state transitions shall occur only as specified:</para>
|
||||
<table>
|
||||
<title>Thread States Transitions</title>
|
||||
<tgroup cols="3" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>From</entry>
|
||||
<entry>To</entry>
|
||||
<entry>Cause</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>[none]</entry>
|
||||
<entry>Ready</entry>
|
||||
<entry><para>Thread is created by a call to a library function.
|
||||
In the case of the initial thread, creation is implicit and
|
||||
occurs during the startup of the main() function [3.6.1].</para></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Ready</entry>
|
||||
<entry>Running</entry>
|
||||
<entry><para>Processor becomes available.</para></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Running</entry>
|
||||
<entry>Ready</entry>
|
||||
<entry>Thread preempted.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Running</entry>
|
||||
<entry>Blocked</entry>
|
||||
<entry>Thread calls a library function which waits for a resource or
|
||||
for the completion of I/O.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Running</entry>
|
||||
<entry>Terminated</entry>
|
||||
<entry>Thread returns from its initial function, calls a thread
|
||||
termination library function, or is canceled by some other thread
|
||||
calling a thread termination library function.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Blocked</entry>
|
||||
<entry>Ready</entry>
|
||||
<entry>The resource being waited for becomes available, or the
|
||||
blocking library function completes.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>Terminated</entry>
|
||||
<entry>[none]</entry>
|
||||
<entry>Thread is detached or joined by some other thread calling the
|
||||
appropriate library function, or by program termination
|
||||
[3.6.3].</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
<para>[Note: if a suspend() function is added to the threading library,
|
||||
additional transitions to the blocked state will have to be added to the
|
||||
above table.]</para>
|
||||
</glossdef>
|
||||
</glossentry>
|
||||
<glossentry id="threads.glossary.race-condition">
|
||||
<glossterm>Race Condition</glossterm>
|
||||
<glossdef>
|
||||
<para>A race condition is what occurs when multiple threads read from and write
|
||||
to the same memory without proper synchronization, resulting in an incorrect
|
||||
value being read or written. The result of a race condition may be a bit
|
||||
pattern which isn't even a valid value for the data type. A race condition
|
||||
results in undefined behavior [1.3.12].</para>
|
||||
<para>Race conditions can be prevented by serializing memory access using
|
||||
the tools provided by &Boost.Threads;.</para>
|
||||
</glossdef>
|
||||
</glossentry>
|
||||
<glossentry id="threads.glossary.deadlock">
|
||||
<glossterm>Deadlock</glossterm>
|
||||
<glossdef>
|
||||
<para>Deadlock is an execution state where for some set of threads, each
|
||||
thread in the set is blocked waiting for some action by one of the other
|
||||
threads in the set. Since each is waiting on the others, none will ever
|
||||
become ready again.</para>
|
||||
</glossdef>
|
||||
</glossentry>
|
||||
<glossentry id="threads.glossary.starvation">
|
||||
<glossterm>Starvation</glossterm>
|
||||
<glossdef>
|
||||
<para>The condition in which a thread is not making sufficient progress in
|
||||
its work during a given time interval.</para>
|
||||
</glossdef>
|
||||
</glossentry>
|
||||
<glossentry id="threads.glossary.priority-failure">
|
||||
<glossterm>Priority Failure</glossterm>
|
||||
<glossdef>
|
||||
<para>A priority failure (such as priority inversion or infinite overtaking)
|
||||
occurs when threads are executed in such a sequence that required work is not
|
||||
performed in time to be useful.</para>
|
||||
</glossdef>
|
||||
</glossentry>
|
||||
<glossentry id="threads.glossary.undefined-behavior">
|
||||
<glossterm>Undefined Behavior</glossterm>
|
||||
<glossdef>
|
||||
<para>The result of certain operations in &Boost.Threads; is undefined;
|
||||
this means that those operations can invoke almost any behavior when
|
||||
they are executed.</para>
|
||||
|
||||
<para>An operation whose behavior is undefined can work "correctly"
|
||||
in some implementations (i.e., do what the programmer thought it
|
||||
would do), while in other implementations it may exhibit almost
|
||||
any "incorrect" behavior--such as returning an invalid value,
|
||||
throwing an exception, generating an access violation, or terminating
|
||||
the process.</para>
|
||||
|
||||
<para>Executing a statement whose behavior is undefined is a
|
||||
programming error.</para>
|
||||
</glossdef>
|
||||
</glossentry>
|
||||
<glossentry id="threads.glossary.memory-visibility">
|
||||
<glossterm>Memory Visibility</glossterm>
|
||||
<glossdef>
|
||||
<para>An address [1.7] shall always point to the same memory byte,
|
||||
regardless of the thread or processor dereferencing the address.</para>
|
||||
<para>An object [1.8, 1.9] is accessible from multiple threads if it is of
|
||||
static storage duration (static, extern) [3.7.1], or if a pointer or
|
||||
reference to it is explicitly or implicitly dereferenced in multiple
|
||||
threads.</para>
|
||||
<para>For an object accessible from multiple threads, the value of the
|
||||
object accessed from one thread may be indeterminate or different from the
|
||||
value accessed from another thread, except under the conditions specified in
|
||||
the following table. For the same row of the table, the value of an object
|
||||
accessible at the indicated sequence point in thread A will be determinate
|
||||
and the same if accessed at or after the indicated sequence point in thread
|
||||
B, provided the object is not otherwise modified. In the table, the
|
||||
"sequence point at a call" is the sequence point after the evaluation of all
|
||||
function arguments [1.9/17], while the "sequence point after a call" is the
|
||||
sequence point after the copying of the returned value... [1.9/17].</para>
|
||||
<table>
|
||||
<title>Memory Visibility</title>
|
||||
<tgroup cols="2">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Thread A</entry>
|
||||
<entry>Thread B</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>The sequence point at a call to a library thread-creation
|
||||
function.</entry>
|
||||
<entry>The first sequence point of the initial function in the new
|
||||
thread created by the Thread A call.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>The sequence point at a call to a library function which
|
||||
locks a mutex, directly or by waiting for a condition
|
||||
variable.</entry>
|
||||
<entry>The sequence point after a call to a library function which
|
||||
unlocks the same mutex.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>The last sequence point before thread termination.</entry>
|
||||
<entry>The sequence point after a call to a library function which
|
||||
joins the terminated thread.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>The sequence point at a call to a library function which
|
||||
signals or broadcasts a condition variable.</entry>
|
||||
<entry>The sequence point after the call to the library function
|
||||
which was waiting on that same condition variable or signal.</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
<para>The architecture of the execution environment and the observable
|
||||
behavior of the abstract machine [1.9] shall be the same on all
|
||||
processors.</para>
|
||||
<para>The latitude granted by the C++ standard for an implementation to
|
||||
alter the definition of observable behavior of the abstract machine to
|
||||
include additional library I/O functions [1.9/6] is extended to include
|
||||
threading library functions.</para>
|
||||
<para>When an exception is thrown and there is no matching exception handler
|
||||
in the same thread, behavior is undefined. The preferred behavior is the
|
||||
same as when there is no matching exception handler in a program
|
||||
[15.3/9]. That is, terminate() is called, and it is implementation-defined
|
||||
whether or not the stack is unwound.</para>
|
||||
</glossdef>
|
||||
</glossentry>
|
||||
<section>
|
||||
<title>Acknowledgements</title>
|
||||
<para>This document was originally written by Beman Dawes, and then much
|
||||
improved by the incorporation of comments from William Kempf, who now
|
||||
maintains the contents.</para>
|
||||
<para>The visibility rules are based on &cite.Butenhof97;.</para>
|
||||
</section>
|
||||
</glossary>
|
||||
34
doc/implementation_notes.xml
Normal file
34
doc/implementation_notes.xml
Normal file
@@ -0,0 +1,34 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<section id="threads.implementation_notes" last-revision="$Date$">
|
||||
<title>Implementation Notes</title>
|
||||
<section id="threads.implementation_notes.win32">
|
||||
<title>Win32</title>
|
||||
<para>
|
||||
In the current Win32 implementation, creating a boost::thread object
|
||||
during dll initialization will result in deadlock because the thread
|
||||
class constructor causes the current thread to wait on the thread that
|
||||
is being created until it signals that it has finished its initialization,
|
||||
and, as stated in the
|
||||
<ulink url="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/dllmain.asp">MSDN Library, "DllMain" article, "Remarks" section</ulink>,
|
||||
"Because DLL notifications are serialized, entry-point functions should not
|
||||
attempt to communicate with other threads or processes. Deadlocks may occur as a result."
|
||||
(Also see <ulink url="http://www.microsoft.com/msj/archive/S220.aspx">"Under the Hood", January 1996</ulink>
|
||||
for a more detailed discussion of this issue).
|
||||
</para>
|
||||
<para>
|
||||
The following non-exhaustive list details some of the situations that
|
||||
should be avoided until this issue can be addressed:
|
||||
<itemizedlist>
|
||||
<listitem>Creating a boost::thread object in DllMain() or in any function called by it.</listitem>
|
||||
<listitem>Creating a boost::thread object in the constructor of a global static object or in any function called by one.</listitem>
|
||||
<listitem>Creating a boost::thread object in MFC's CWinApp::InitInstance() function or in any function called by it.</listitem>
|
||||
<listitem>Creating a boost::thread object in the function pointed to by MFC's _pRawDllMain function pointer or in any function called by it.</listitem>
|
||||
</itemizedlist>
|
||||
</para>
|
||||
</section>
|
||||
</section>
|
||||
8
doc/index.html
Normal file
8
doc/index.html
Normal file
@@ -0,0 +1,8 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0; URL=../../../doc/html/threads.html">
|
||||
</head>
|
||||
<body>
|
||||
Automatic redirection failed, please go to <a href="../../../doc/html/threads.html">../../../doc/html/threads.html</a>
|
||||
</body>
|
||||
</html>
|
||||
305
doc/mutex-ref.xml
Normal file
305
doc/mutex-ref.xml
Normal file
@@ -0,0 +1,305 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<header name="boost/thread/mutex.hpp"
|
||||
last-revision="$Date$">
|
||||
<namespace name="boost">
|
||||
<class name="mutex">
|
||||
<purpose>
|
||||
<para>The <classname>mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.Mutex">Mutex</link> concept.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>The <classname>mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.Mutex">Mutex</link> concept.
|
||||
It should be used to synchronize access to shared resources using
|
||||
<link linkend="threads.concepts.unspecified-locking-strategy">Unspecified</link>
|
||||
locking mechanics.</para>
|
||||
|
||||
<para>For classes that model related mutex concepts, see
|
||||
<classname>try_mutex</classname> and <classname>timed_mutex</classname>.</para>
|
||||
|
||||
<para>For <link linkend="threads.concepts.recursive-locking-strategy">Recursive</link>
|
||||
locking mechanics, see <classname>recursive_mutex</classname>,
|
||||
<classname>recursive_try_mutex</classname>, and <classname>recursive_timed_mutex</classname>.
|
||||
</para>
|
||||
|
||||
<para>The <classname>mutex</classname> class supplies the following typedef,
|
||||
which <link linkend="threads.concepts.lock-models">models</link>
|
||||
the specified locking strategy:
|
||||
|
||||
<informaltable>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Lock Name</entry>
|
||||
<entry>Lock Concept</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>scoped_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedLock">ScopedLock</link></entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</para>
|
||||
|
||||
<para>The <classname>mutex</classname> class uses an
|
||||
<link linkend="threads.concepts.unspecified-locking-strategy">Unspecified</link>
|
||||
locking strategy, so attempts to recursively lock a <classname>mutex</classname>
|
||||
object or attempts to unlock one by threads that don't own a lock on it result in
|
||||
<emphasis role="bold">undefined behavior</emphasis>.
|
||||
This strategy allows implementations to be as efficient as possible
|
||||
on any given platform. It is, however, recommended that
|
||||
implementations include debugging support to detect misuse when
|
||||
<code>NDEBUG</code> is not defined.</para>
|
||||
|
||||
<para>Like all
|
||||
<link linkend="threads.concepts.mutex-models">mutex models</link>
|
||||
in &Boost.Threads;, <classname>mutex</classname> leaves the
|
||||
<link linkend="threads.concepts.sheduling-policies">scheduling policy</link>
|
||||
as <link linkend="threads.concepts.unspecified-scheduling-policy">Unspecified</link>.
|
||||
Programmers should make no assumptions about the order in which
|
||||
waiting threads acquire a lock.</para>
|
||||
</description>
|
||||
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<typedef name="scoped_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<constructor>
|
||||
<effects>Constructs a <classname>mutex</classname> object.
|
||||
</effects>
|
||||
|
||||
<postconditions><code>*this</code> is in an unlocked state.
|
||||
</postconditions>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects>Destroys a <classname>mutex</classname> object.</effects>
|
||||
|
||||
<requires><code>*this</code> is in an unlocked state.</requires>
|
||||
|
||||
<notes><emphasis role="bold">Danger:</emphasis> Destruction of a
|
||||
locked mutex is a serious programming error resulting in undefined
|
||||
behavior such as a program crash.</notes>
|
||||
</destructor>
|
||||
</class>
|
||||
|
||||
<class name="try_mutex">
|
||||
<purpose>
|
||||
<para>The <classname>try_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.TryMutex">TryMutex</link> concept.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>The <classname>try_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.TryMutex">TryMutex</link> concept.
|
||||
It should be used to synchronize access to shared resources using
|
||||
<link linkend="threads.concepts.unspecified-locking-strategy">Unspecified</link>
|
||||
locking mechanics.</para>
|
||||
|
||||
<para>For classes that model related mutex concepts, see
|
||||
<classname>mutex</classname> and <classname>timed_mutex</classname>.</para>
|
||||
|
||||
<para>For <link linkend="threads.concepts.recursive-locking-strategy">Recursive</link>
|
||||
locking mechanics, see <classname>recursive_mutex</classname>,
|
||||
<classname>recursive_try_mutex</classname>, and <classname>recursive_timed_mutex</classname>.
|
||||
</para>
|
||||
|
||||
<para>The <classname>try_mutex</classname> class supplies the following typedefs,
|
||||
which <link linkend="threads.concepts.lock-models">model</link>
|
||||
the specified locking strategies:
|
||||
|
||||
<informaltable>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Lock Name</entry>
|
||||
<entry>Lock Concept</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>scoped_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedLock">ScopedLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_try_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTryLock">ScopedTryLock</link></entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</para>
|
||||
|
||||
<para>The <classname>try_mutex</classname> class uses an
|
||||
<link linkend="threads.concepts.unspecified-locking-strategy">Unspecified</link>
|
||||
locking strategy, so attempts to recursively lock a <classname>try_mutex</classname>
|
||||
object or attempts to unlock one by threads that don't own a lock on it result in
|
||||
<emphasis role="bold">undefined behavior</emphasis>.
|
||||
This strategy allows implementations to be as efficient as possible
|
||||
on any given platform. It is, however, recommended that
|
||||
implementations include debugging support to detect misuse when
|
||||
<code>NDEBUG</code> is not defined.</para>
|
||||
|
||||
<para>Like all
|
||||
<link linkend="threads.concepts.mutex-models">mutex models</link>
|
||||
in &Boost.Threads;, <classname>try_mutex</classname> leaves the
|
||||
<link linkend="threads.concepts.sheduling-policies">scheduling policy</link>
|
||||
as <link linkend="threads.concepts.unspecified-scheduling-policy">Unspecified</link>.
|
||||
Programmers should make no assumptions about the order in which
|
||||
waiting threads acquire a lock.</para>
|
||||
</description>
|
||||
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<typedef name="scoped_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_try_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<constructor>
|
||||
<effects>Constructs a <classname>try_mutex</classname> object.
|
||||
</effects>
|
||||
|
||||
<postconditions><code>*this</code> is in an unlocked state.
|
||||
</postconditions>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects>Destroys a <classname>try_mutex</classname> object.
|
||||
</effects>
|
||||
|
||||
<requires><code>*this</code> is in an unlocked state.</requires>
|
||||
|
||||
<notes><emphasis role="bold">Danger:</emphasis> Destruction of a
|
||||
locked mutex is a serious programming error resulting in undefined
|
||||
behavior such as a program crash.</notes>
|
||||
</destructor>
|
||||
</class>
|
||||
|
||||
<class name="timed_mutex">
|
||||
<purpose>
|
||||
<para>The <classname>timed_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.TimedMutex">TimedMutex</link> concept.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>The <classname>timed_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.TimedMutex">TimedMutex</link> concept.
|
||||
It should be used to synchronize access to shared resources using
|
||||
<link linkend="threads.concepts.unspecified-locking-strategy">Unspecified</link>
|
||||
locking mechanics.</para>
|
||||
|
||||
<para>For classes that model related mutex concepts, see
|
||||
<classname>mutex</classname> and <classname>try_mutex</classname>.</para>
|
||||
|
||||
<para>For <link linkend="threads.concepts.recursive-locking-strategy">Recursive</link>
|
||||
locking mechanics, see <classname>recursive_mutex</classname>,
|
||||
<classname>recursive_try_mutex</classname>, and <classname>recursive_timed_mutex</classname>.
|
||||
</para>
|
||||
|
||||
<para>The <classname>timed_mutex</classname> class supplies the following typedefs,
|
||||
which <link linkend="threads.concepts.lock-models">model</link>
|
||||
the specified locking strategies:
|
||||
|
||||
<informaltable>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Lock Name</entry>
|
||||
<entry>Lock Concept</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>scoped_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedLock">ScopedLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_try_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTryLock">ScopedTryLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_timed_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTimedLock">ScopedTimedLock</link></entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</para>
|
||||
|
||||
<para>The <classname>timed_mutex</classname> class uses an
|
||||
<link linkend="threads.concepts.unspecified-locking-strategy">Unspecified</link>
|
||||
locking strategy, so attempts to recursively lock a <classname>timed_mutex</classname>
|
||||
object or attempts to unlock one by threads that don't own a lock on it result in
|
||||
<emphasis role="bold">undefined behavior</emphasis>.
|
||||
This strategy allows implementations to be as efficient as possible
|
||||
on any given platform. It is, however, recommended that
|
||||
implementations include debugging support to detect misuse when
|
||||
<code>NDEBUG</code> is not defined.</para>
|
||||
|
||||
<para>Like all
|
||||
<link linkend="threads.concepts.mutex-models">mutex models</link>
|
||||
in &Boost.Threads;, <classname>timed_mutex</classname> leaves the
|
||||
<link linkend="threads.concepts.sheduling-policies">scheduling policy</link>
|
||||
as <link linkend="threads.concepts.unspecified-scheduling-policy">Unspecified</link>.
|
||||
Programmers should make no assumptions about the order in which
|
||||
waiting threads acquire a lock.</para>
|
||||
</description>
|
||||
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<typedef name="scoped_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_try_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_timed_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<constructor>
|
||||
<effects>Constructs a <classname>timed_mutex</classname> object.
|
||||
</effects>
|
||||
|
||||
<postconditions><code>*this</code> is in an unlocked state.
|
||||
</postconditions>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects>Destroys a <classname>timed_mutex</classname> object.</effects>
|
||||
|
||||
<requires><code>*this</code> is in an unlocked state.</requires>
|
||||
|
||||
<notes><emphasis role="bold">Danger:</emphasis> Destruction of a
|
||||
locked mutex is a serious programming error resulting in undefined
|
||||
behavior such as a program crash.</notes>
|
||||
</destructor>
|
||||
</class>
|
||||
</namespace>
|
||||
</header>
|
||||
86
doc/once-ref.xml
Normal file
86
doc/once-ref.xml
Normal file
@@ -0,0 +1,86 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<header name="boost/thread/once.hpp"
|
||||
last-revision="$Date$">
|
||||
<macro name="BOOST_ONCE_INIT">
|
||||
<purpose>The <functionname>call_once</functionname> function and
|
||||
<code>once_flag</code> type (statically initialized to
|
||||
<macroname>BOOST_ONCE_INIT</macroname>) can be used to run a
|
||||
routine exactly once. This can be used to initialize data in a
|
||||
<link linkend="threads.glossary.thread-safe">thread-safe</link>
|
||||
manner.</purpose>
|
||||
|
||||
<description>The implementation-defined macro
|
||||
<macroname>BOOST_ONCE_INIT</macroname> is a constant value used to
|
||||
initialize <code>once_flag</code> instances to indicate that the
|
||||
logically associated routine has not been run yet. See
|
||||
<functionname>call_once</functionname> for more details.</description>
|
||||
</macro>
|
||||
|
||||
<namespace name="boost">
|
||||
<typedef name="once_flag">
|
||||
<purpose>The <functionname>call_once</functionname> function and
|
||||
<code>once_flag</code> type (statically initialized to
|
||||
<macroname>BOOST_ONCE_INIT</macroname>) can be used to run a
|
||||
routine exactly once. This can be used to initialize data in a
|
||||
<link linkend="threads.glossary.thread-safe">thread-safe</link>
|
||||
manner.</purpose>
|
||||
|
||||
<description>The implementation-defined type <code>once_flag</code>
|
||||
is used as a flag to insure a routine is called only once.
|
||||
Instances of this type should be statically initialized to
|
||||
<macroname>BOOST_ONCE_INIT</macroname>. See
|
||||
<functionname>call_once</functionname> for more details.
|
||||
</description>
|
||||
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<function name="call_once">
|
||||
<purpose>The <functionname>call_once</functionname> function and
|
||||
<code>once_flag</code> type (statically initialized to
|
||||
<macroname>BOOST_ONCE_INIT</macroname>) can be used to run a
|
||||
routine exactly once. This can be used to initialize data in a
|
||||
<link linkend="threads.glossary.thread-safe">thread-safe</link>
|
||||
manner.</purpose>
|
||||
|
||||
<description>
|
||||
<para>Example usage is as follows:</para>
|
||||
<para>
|
||||
<programlisting>//Example usage:
|
||||
boost::once_flag once = BOOST_ONCE_INIT;
|
||||
|
||||
void init()
|
||||
{
|
||||
//...
|
||||
}
|
||||
|
||||
void thread_proc()
|
||||
{
|
||||
boost::call_once(&init, once);
|
||||
}</programlisting>
|
||||
</para></description>
|
||||
|
||||
<parameter name="func">
|
||||
<paramtype>void (*func)()</paramtype>
|
||||
</parameter>
|
||||
|
||||
<parameter name="flag">
|
||||
<paramtype>once_flag&</paramtype>
|
||||
</parameter>
|
||||
|
||||
<requires>The function <code>func</code> shall not throw
|
||||
exceptions.</requires>
|
||||
|
||||
<effects>As if (in an atomic fashion):
|
||||
<code>if (flag == BOOST_ONCE_INIT) func();</code></effects>
|
||||
|
||||
<postconditions><code>flag != BOOST_ONCE_INIT</code>
|
||||
</postconditions>
|
||||
</function>
|
||||
</namespace>
|
||||
</header>
|
||||
202
doc/overview.xml
Normal file
202
doc/overview.xml
Normal file
@@ -0,0 +1,202 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<section id="threads.overview" last-revision="$Date$">
|
||||
<title>Overview</title>
|
||||
<section id="threads.introduction">
|
||||
<title>Introduction</title>
|
||||
<para>&Boost.Threads; allows C++ programs to execute as multiple,
|
||||
asynchronous, independent threads-of-execution. Each thread has its own
|
||||
machine state including program instruction counter and registers. Programs
|
||||
which execute as multiple threads are called multithreaded programs to
|
||||
distinguish them from traditional single-threaded programs. The <link
|
||||
linkend="threads.glossary">glossary</link> gives a more complete description
|
||||
of the multithreading execution environment.</para>
|
||||
<para>Multithreading provides several advantages:
|
||||
<itemizedlist>
|
||||
<listitem>
|
||||
<para>Programs which would otherwise block waiting for some external
|
||||
event can continue to respond if the blocking operation is placed in a
|
||||
separate thread. Multithreading is usually an absolute requirement for
|
||||
these programs.</para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para>Well-designed multithreaded programs may execute faster than
|
||||
single-threaded programs, particularly on multiprocessor hardware.
|
||||
Note, however, that poorly-designed multithreaded programs are often
|
||||
slower than single-threaded programs.</para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para>Some program designs may be easier to formulate using a
|
||||
multithreaded approach. After all, the real world is
|
||||
asynchronous!</para>
|
||||
</listitem>
|
||||
</itemizedlist></para>
|
||||
</section>
|
||||
<section>
|
||||
<title>Dangers</title>
|
||||
<section>
|
||||
<title>General considerations</title>
|
||||
<para>Beyond the errors which can occur in single-threaded programs,
|
||||
multithreaded programs are subject to additional errors:
|
||||
<itemizedlist>
|
||||
<listitem>
|
||||
<para><link linkend="threads.glossary.race-condition">Race
|
||||
conditions</link></para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para><link linkend="threads.glossary.deadlock">Deadlock</link>
|
||||
(sometimes called "deadly embrace")</para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para><link linkend="threads.glossary.priority-failure">Priority
|
||||
failures</link> (priority inversion, infinite overtaking, starvation,
|
||||
etc.)</para>
|
||||
</listitem>
|
||||
</itemizedlist></para>
|
||||
<para>Every multithreaded program must be designed carefully to avoid these
|
||||
errors. These aren't rare or exotic failures - they are virtually guaranteed
|
||||
to occur unless multithreaded code is designed to avoid them. Priority
|
||||
failures are somewhat less common, but are nonetheless serious.</para>
|
||||
<para>The <link linkend="threads.design">&Boost.Threads; design</link>
|
||||
attempts to minimize these errors, but they will still occur unless the
|
||||
programmer proactively designs to avoid them.</para>
|
||||
<note>Please also see <xref linkend="threads.implementation_notes"/>
|
||||
for additional, implementation-specific considerations.</note>
|
||||
</section>
|
||||
<section>
|
||||
<title>Testing and debugging considerations</title>
|
||||
<para>Multithreaded programs are non-deterministic. In other words, the
|
||||
same program with the same input data may follow different execution
|
||||
paths each time it is invoked. That can make testing and debugging a
|
||||
nightmare:
|
||||
<itemizedlist>
|
||||
<listitem>
|
||||
<para>Failures are often not repeatable.</para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para>Probe effect causes debuggers to produce very different results
|
||||
from non-debug uses.</para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para>Debuggers require special support to show thread state.</para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para>Tests on a single processor system may give no indication of
|
||||
serious errors which would appear on multiprocessor systems, and visa
|
||||
versa. Thus test cases should include a varying number of
|
||||
processors.</para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para>For programs which create a varying number of threads according
|
||||
to workload, tests which don't span the full range of possibilities
|
||||
may miss serious errors.</para>
|
||||
</listitem>
|
||||
</itemizedlist></para>
|
||||
</section>
|
||||
<section>
|
||||
<title>Getting a head start</title>
|
||||
<para>Although it might appear that multithreaded programs are inherently
|
||||
unreliable, many reliable multithreaded programs do exist. Multithreading
|
||||
techniques are known which lead to reliable programs.</para>
|
||||
<para>Design patterns for reliable multithreaded programs, including the
|
||||
important <emphasis>monitor</emphasis> pattern, are presented in
|
||||
<emphasis>Pattern-Oriented Software Architecture Volume 2 - Patterns for
|
||||
Concurrent and Networked Objects</emphasis>
|
||||
&cite.SchmidtStalRohnertBuschmann;. Many important multithreading programming
|
||||
considerations (independent of threading library) are discussed in
|
||||
<emphasis>Programming with POSIX Threads</emphasis> &cite.Butenhof97;.</para>
|
||||
<para>Doing some reading before attempting multithreaded designs will
|
||||
give you a head start toward reliable multithreaded programs.</para>
|
||||
</section>
|
||||
</section>
|
||||
<section>
|
||||
<title>C++ Standard Library usage in multithreaded programs</title>
|
||||
<section>
|
||||
<title>Runtime libraries</title>
|
||||
<para>
|
||||
<emphasis role="bold">Warning:</emphasis> Multithreaded programs such as
|
||||
those using &Boost.Threads; must link to <link
|
||||
linkend="threads.glossary.thread-safe">thread-safe</link> versions of
|
||||
all runtime libraries used by the program, including the runtime library
|
||||
for the C++ Standard Library. Failure to do so will cause <link
|
||||
linkend="threads.glossary.race-condition">race conditions</link> to occur
|
||||
when multiple threads simultaneously execute runtime library functions for
|
||||
<code>new</code>, <code>delete</code>, or other language features which
|
||||
imply shared state.</para>
|
||||
</section>
|
||||
<section>
|
||||
<title>Potentially non-thread-safe functions</title>
|
||||
<para>Certain C++ Standard Library functions inherited from C are
|
||||
particular problems because they hold internal state between
|
||||
calls:
|
||||
<itemizedlist>
|
||||
<listitem>
|
||||
<para><code>rand</code></para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para><code>strtok</code></para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para><code>asctime</code></para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para><code>ctime</code></para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para><code>gmtime</code></para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para><code>localtime</code></para>
|
||||
</listitem>
|
||||
</itemizedlist></para>
|
||||
<para>It is possible to write thread-safe implementations of these by
|
||||
using thread specific storage (see
|
||||
<classname>boost::thread_specific_ptr</classname>), and several C++
|
||||
compiler vendors do just that. The technique is well-know and is explained
|
||||
in &cite.Butenhof97;.</para>
|
||||
<para>But at least one vendor (HP-UX) does not provide thread-safe
|
||||
implementations of the above functions in their otherwise thread-safe
|
||||
runtime library. Instead they provide replacement functions with
|
||||
different names and arguments.</para>
|
||||
<para><emphasis role="bold">Recommendation:</emphasis> For the most
|
||||
portable, yet thread-safe code, use Boost replacements for the problem
|
||||
functions. See the <libraryname>Boost Random Number Library</libraryname>
|
||||
and <libraryname>Boost Tokenizer Library</libraryname>.</para>
|
||||
</section>
|
||||
</section>
|
||||
<section>
|
||||
<title>Common guarantees for all &Boost.Threads; components</title>
|
||||
<section>
|
||||
<title>Exceptions</title>
|
||||
<para>&Boost.Threads; destructors never
|
||||
throw exceptions. Unless otherwise specified, other
|
||||
&Boost.Threads; functions that do not have
|
||||
an exception-specification may throw implementation-defined
|
||||
exceptions.</para>
|
||||
<para>In particular, &Boost.Threads;
|
||||
reports failure to allocate storage by throwing an exception of type
|
||||
<code>std::bad_alloc</code> or a class derived from
|
||||
<code>std::bad_alloc</code>, failure to obtain thread resources other than
|
||||
memory by throwing an exception of type
|
||||
<classname>boost::thread_resource_error</classname>, and certain lock
|
||||
related failures by throwing an exception of type
|
||||
<classname>boost::lock_error</classname>.</para>
|
||||
<para><emphasis role="bold">Rationale:</emphasis> Follows the C++ Standard
|
||||
Library practice of allowing all functions except destructors or other
|
||||
specified functions to throw exceptions on errors.</para>
|
||||
</section>
|
||||
<section>
|
||||
<title>NonCopyable requirement</title>
|
||||
<para>&Boost.Threads; classes documented as
|
||||
meeting the NonCopyable requirement disallow copy construction and copy
|
||||
assignment. For the sake of exposition, the synopsis of such classes show
|
||||
private derivation from <classname>boost::noncopyable</classname>. Users
|
||||
should not depend on this derivation, however, as implementations are free
|
||||
to meet the NonCopyable requirement in other ways.</para>
|
||||
</section>
|
||||
</section>
|
||||
</section>
|
||||
434
doc/rationale.xml
Normal file
434
doc/rationale.xml
Normal file
@@ -0,0 +1,434 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<section id="threads.rationale" last-revision="$Date$">
|
||||
<title>Rationale</title>
|
||||
<para>This page explains the rationale behind various design decisions in the
|
||||
&Boost.Threads; library. Having the rationale documented here should explain
|
||||
how we arrived at the current design as well as prevent future rehashing of
|
||||
discussions and thought processes that have already occurred. It can also give
|
||||
users a lot of insight into the design process required for this
|
||||
library.</para>
|
||||
<section id="threads.rationale.Boost.Threads">
|
||||
<title>Rationale for the Creation of &Boost.Threads;</title>
|
||||
<para>Processes often have a degree of "potential parallelism" and it can
|
||||
often be more intuitive to design systems with this in mind. Further, these
|
||||
parallel processes can result in more responsive programs. The benefits for
|
||||
multithreaded programming are quite well known to most modern programmers,
|
||||
yet the C++ language doesn't directly support this concept.</para>
|
||||
<para>Many platforms support multithreaded programming despite the fact that
|
||||
the language doesn't support it. They do this through external libraries,
|
||||
which are, unfortunately, platform specific. POSIX has tried to address this
|
||||
problem through the standardization of a "pthread" library. However, this is
|
||||
a standard only on POSIX platforms, so its portability is limited.</para>
|
||||
<para>Another problem with POSIX and other platform specific thread
|
||||
libraries is that they are almost universally C based libraries. This leaves
|
||||
several C++ specific issues unresolved, such as what happens when an
|
||||
exception is thrown in a thread. Further, there are some C++ concepts, such
|
||||
as destructors, that can make usage much easier than what's available in a C
|
||||
library.</para>
|
||||
<para>What's truly needed is C++ language support for threads. However, the
|
||||
C++ standards committee needs existing practice or a good proposal as a
|
||||
starting point for adding this to the standard.</para>
|
||||
<para>The &Boost.Threads; library was developed to provide a C++ developer
|
||||
with a portable interface for writing multithreaded programs on numerous
|
||||
platforms. There's a hope that the library can be the basis for a more
|
||||
detailed proposal for the C++ standards committee to consider for inclusion
|
||||
in the next C++ standard.</para>
|
||||
</section>
|
||||
<section id="threads.rationale.primitives">
|
||||
<title>Rationale for the Low Level Primitives Supported in &Boost.Threads;</title>
|
||||
<para>The &Boost.Threads; library supplies a set of low level primitives for
|
||||
writing multithreaded programs, such as mutexes and condition variables. In
|
||||
fact, the first release of &Boost.Threads; supports only these low level
|
||||
primitives. However, computer science research has shown that use of these
|
||||
primitives is difficult since it's difficult to mathematically prove that a
|
||||
usage pattern is correct, meaning it doesn't result in race conditions or
|
||||
deadlocks. There are several algebras (such as CSP, CCS and Join calculus)
|
||||
that have been developed to help write provably correct parallel
|
||||
processes. In order to prove the correctness these processes must be coded
|
||||
using higher level abstractions. So why does &Boost.Threads; support the
|
||||
lower level concepts?</para>
|
||||
<para>The reason is simple: the higher level concepts need to be implemented
|
||||
using at least some of the lower level concepts. So having portable lower
|
||||
level concepts makes it easier to develop the higher level concepts and will
|
||||
allow researchers to experiment with various techniques.</para>
|
||||
<para>Beyond this theoretical application of higher level concepts, however,
|
||||
the fact remains that many multithreaded programs are written using only the
|
||||
lower level concepts, so they are useful in and of themselves, even if it's
|
||||
hard to prove that their usage is correct. Since many users will be familiar
|
||||
with these lower level concepts but unfamiliar with any of the higher
|
||||
level concepts, supporting the lower level concepts provides
|
||||
greater accessibility.</para>
|
||||
</section>
|
||||
<section id="threads.rationale.locks">
|
||||
<title>Rationale for the Lock Design</title>
|
||||
<para>Programmers who are used to multithreaded programming issues will
|
||||
quickly note that the &Boost.Threads; design for mutex lock concepts is not
|
||||
<link linkend="threads.glossary.thread-safe">thread-safe</link> (this is
|
||||
clearly documented as well). At first this may seem like a serious design
|
||||
flaw. Why have a multithreading primitive that's not thread-safe
|
||||
itself?</para>
|
||||
<para>A lock object is not a synchronization primitive. A lock object's sole
|
||||
responsibility is to ensure that a mutex is both locked and unlocked in a
|
||||
manner that won't result in the common error of locking a mutex and then
|
||||
forgetting to unlock it. This means that instances of a lock object are only
|
||||
going to be created, at least in theory, within block scope and won't be
|
||||
shared between threads. Only the mutex objects will be created outside of
|
||||
block scope and/or shared between threads. Though it's possible to create a
|
||||
lock object outside of block scope and to share it between threads, to do so
|
||||
would not be a typical usage (in fact, to do so would likely be an
|
||||
error). Nor are there any cases when such usage would be required.</para>
|
||||
<para>Lock objects must maintain some state information. In order to allow a
|
||||
program to determine if a try_lock or timed_lock was successful the lock
|
||||
object must retain state indicating the success or failure of the call made
|
||||
in its constructor. If a lock object were to have such state and remain
|
||||
thread-safe it would need to synchronize access to the state information
|
||||
which would result in roughly doubling the time of most operations. Worse,
|
||||
since checking the state can occur only by a call after construction, we'd
|
||||
have a race condition if the lock object were shared between threads.</para>
|
||||
<para>So, to avoid the overhead of synchronizing access to the state
|
||||
information and to avoid the race condition, the &Boost.Threads; library
|
||||
simply does nothing to make lock objects thread-safe. Instead, sharing a
|
||||
lock object between threads results in undefined behavior. Since the only
|
||||
proper usage of lock objects is within block scope this isn't a problem, and
|
||||
so long as the lock object is properly used there's no danger of any
|
||||
multithreading issues.</para>
|
||||
</section>
|
||||
<section id="threads.rationale.non-copyable">
|
||||
<title>Rationale for NonCopyable Thread Type</title>
|
||||
<para>Programmers who are used to C libraries for multithreaded programming
|
||||
are likely to wonder why &Boost.Threads; uses a noncopyable design for
|
||||
<classname>boost::thread</classname>. After all, the C thread types are
|
||||
copyable, and you often have a need for copying them within user
|
||||
code. However, careful comparison of C designs to C++ designs shows a flaw
|
||||
in this logic.</para>
|
||||
<para>All C types are copyable. It is, in fact, not possible to make a
|
||||
noncopyable type in C. For this reason types that represent system resources
|
||||
in C are often designed to behave very similarly to a pointer to dynamic
|
||||
memory. There's an API for acquiring the resource and an API for releasing
|
||||
the resource. For memory we have pointers as the type and alloc/free for
|
||||
the acquisition and release APIs. For files we have FILE* as the type and
|
||||
fopen/fclose for the acquisition and release APIs. You can freely copy
|
||||
instances of the types but must manually manage the lifetime of the actual
|
||||
resource through the acquisition and release APIs.</para>
|
||||
<para>C++ designs recognize that the acquisition and release APIs are error
|
||||
prone and try to eliminate possible errors by acquiring the resource in the
|
||||
constructor and releasing it in the destructor. The best example of such a
|
||||
design is the std::iostream set of classes which can represent the same
|
||||
resource as the FILE* type in C. A file is opened in the std::fstream's
|
||||
constructor and closed in its destructor. However, if an iostream were
|
||||
copyable it could lead to a file being closed twice, an obvious error, so
|
||||
the std::iostream types are noncopyable by design. This is the same design
|
||||
used by boost::thread, which is a simple and easy to understand design
|
||||
that's consistent with other C++ standard types.</para>
|
||||
<para>During the design of boost::thread it was pointed out that it would be
|
||||
possible to allow it to be a copyable type if some form of "reference
|
||||
management" were used, such as ref-counting or ref-lists, and many argued
|
||||
for a boost::thread_ref design instead. The reasoning was that copying
|
||||
"thread" objects was a typical need in the C libraries, and so presumably
|
||||
would be in the C++ libraries as well. It was also thought that
|
||||
implementations could provide more efficient reference management than
|
||||
wrappers (such as boost::shared_ptr) around a noncopyable thread
|
||||
concept. Analysis of whether or not these arguments would hold true doesn't
|
||||
appear to bear them out. To illustrate the analysis we'll first provide
|
||||
pseudo-code illustrating the six typical usage patterns of a thread
|
||||
object.</para>
|
||||
<section id="threads.rationale.non-copyable.simple">
|
||||
<title>1. Use case: Simple creation of a thread.</title>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
create_thread(&bar);
|
||||
}
|
||||
</programlisting>
|
||||
</section>
|
||||
<section id="threads.rationale.non-copyable.joined">
|
||||
<title>2. Use case: Creation of a thread that's later joined.</title>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
thread = create_thread(&bar);
|
||||
join(thread);
|
||||
}
|
||||
</programlisting>
|
||||
</section>
|
||||
<section id="threads.rationale.non-copyable.loop">
|
||||
<title>3. Use case: Simple creation of several threads in a loop.</title>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
for (int i=0; i<NUM_THREADS; ++i)
|
||||
create_thread(&bar);
|
||||
}
|
||||
</programlisting>
|
||||
</section>
|
||||
<section id="threads.rationale.non-copyable.loop-join">
|
||||
<title>4. Use case: Creation of several threads in a loop which are later joined.</title>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
for (int i=0; i<NUM_THREADS; ++i)
|
||||
threads[i] = create_thread(&bar);
|
||||
for (int i=0; i<NUM_THREADS; ++i)
|
||||
threads[i].join();
|
||||
}
|
||||
</programlisting>
|
||||
</section>
|
||||
<section id="threads.rationale.non-copyable.pass">
|
||||
<title>5. Use case: Creation of a thread whose ownership is passed to another object/method.</title>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
thread = create_thread(&bar);
|
||||
manager.owns(thread);
|
||||
}
|
||||
</programlisting>
|
||||
</section>
|
||||
<section id="threads.rationale.non-copyable.shared">
|
||||
<title>6. Use case: Creation of a thread whose ownership is shared between multiple
|
||||
objects.</title>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
thread = create_thread(&bar);
|
||||
manager1.add(thread);
|
||||
manager2.add(thread);
|
||||
}
|
||||
</programlisting>
|
||||
</section>
|
||||
<para>Of these usage patterns there's only one that requires reference
|
||||
management (number 6). Hopefully it's fairly obvious that this usage pattern
|
||||
simply won't occur as often as the other usage patterns. So there really
|
||||
isn't a "typical need" for a thread concept, though there is some
|
||||
need.</para>
|
||||
<para>Since the need isn't typical we must use different criteria for
|
||||
deciding on either a thread_ref or thread design. Possible criteria include
|
||||
ease of use and performance. So let's analyze both of these
|
||||
carefully.</para>
|
||||
<para>With ease of use we can look at existing experience. The standard C++
|
||||
objects that represent a system resource, such as std::iostream, are
|
||||
noncopyable, so we know that C++ programmers must at least be experienced
|
||||
with this design. Most C++ developers are also used to smart pointers such
|
||||
as boost::shared_ptr, so we know they can at least adapt to a thread_ref
|
||||
concept with little effort. So existing experience isn't going to lead us to
|
||||
a choice.</para>
|
||||
<para>The other thing we can look at is how difficult it is to use both
|
||||
types for the six usage patterns above. If we find it overly difficult to
|
||||
use a concept for any of the usage patterns there would be a good argument
|
||||
for choosing the other design. So we'll code all six usage patterns using
|
||||
both designs.</para>
|
||||
<section id="threads.rationale_comparison.non-copyable.simple">
|
||||
<title>1. Comparison: simple creation of a thread.</title>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
thread thrd(&bar);
|
||||
}
|
||||
void foo()
|
||||
{
|
||||
thread_ref thrd = create_thread(&bar);
|
||||
}
|
||||
</programlisting>
|
||||
</section>
|
||||
<section id="threads.rationale_comparison.non-copyable.joined">
|
||||
<title>2. Comparison: creation of a thread that's later joined.</title>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
thread thrd(&bar);
|
||||
thrd.join();
|
||||
}
|
||||
void foo()
|
||||
{
|
||||
thread_ref thrd =
|
||||
create_thread(&bar);thrd->join();
|
||||
}
|
||||
</programlisting>
|
||||
</section>
|
||||
<section id="threads.rationale_comparison.non-copyable.loop">
|
||||
<title>3. Comparison: simple creation of several threads in a loop.</title>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
for (int i=0; i<NUM_THREADS; ++i)
|
||||
thread thrd(&bar);
|
||||
}
|
||||
void foo()
|
||||
{
|
||||
for (int i=0; i<NUM_THREADS; ++i)
|
||||
thread_ref thrd = create_thread(&bar);
|
||||
}
|
||||
</programlisting>
|
||||
</section>
|
||||
<section id="threads.rationale_comparison.non-copyable.loop-join">
|
||||
<title>4. Comparison: creation of several threads in a loop which are later joined.</title>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
std::auto_ptr<thread> threads[NUM_THREADS];
|
||||
for (int i=0; i<NUM_THREADS; ++i)
|
||||
threads[i] = std::auto_ptr<thread>(new thread(&bar));
|
||||
for (int i= 0; i<NUM_THREADS;
|
||||
++i)threads[i]->join();
|
||||
}
|
||||
void foo()
|
||||
{
|
||||
thread_ref threads[NUM_THREADS];
|
||||
for (int i=0; i<NUM_THREADS; ++i)
|
||||
threads[i] = create_thread(&bar);
|
||||
for (int i= 0; i<NUM_THREADS;
|
||||
++i)threads[i]->join();
|
||||
}
|
||||
</programlisting>
|
||||
</section>
|
||||
<section id="threads.rationale_comparison.non-copyable.pass">
|
||||
<title>5. Comparison: creation of a thread whose ownership is passed to another object/method.</title>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
thread thrd* = new thread(&bar);
|
||||
manager.owns(thread);
|
||||
}
|
||||
void foo()
|
||||
{
|
||||
thread_ref thrd = create_thread(&bar);
|
||||
manager.owns(thrd);
|
||||
}
|
||||
</programlisting>
|
||||
</section>
|
||||
<section id="threads.rationale_comparison.non-copyable.shared">
|
||||
<title>6. Comparison: creation of a thread whose ownership is shared
|
||||
between multiple objects.</title>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
boost::shared_ptr<thread> thrd(new thread(&bar));
|
||||
manager1.add(thrd);
|
||||
manager2.add(thrd);
|
||||
}
|
||||
void foo()
|
||||
{
|
||||
thread_ref thrd = create_thread(&bar);
|
||||
manager1.add(thrd);
|
||||
manager2.add(thrd);
|
||||
}
|
||||
</programlisting>
|
||||
</section>
|
||||
<para>This shows the usage patterns being nearly identical in complexity for
|
||||
both designs. The only actual added complexity occurs because of the use of
|
||||
operator new in
|
||||
<link linkend="threads.rationale_comparison.non-copyable.loop-join">(4)</link>,
|
||||
<link linkend="threads.rationale_comparison.non-copyable.pass">(5)</link>, and
|
||||
<link linkend="threads.rationale_comparison.non-copyable.shared">(6)</link>;
|
||||
and the use of std::auto_ptr and boost::shared_ptr in
|
||||
<link linkend="threads.rationale_comparison.non-copyable.loop-join">(4)</link> and
|
||||
<link linkend="threads.rationale_comparison.non-copyable.shared">(6)</link>
|
||||
respectively. However, that's not really
|
||||
much added complexity, and C++ programmers are used to using these idioms
|
||||
anyway. Some may dislike the presence of operator new in user code, but
|
||||
this can be eliminated by proper design of higher level concepts, such as
|
||||
the boost::thread_group class that simplifies example
|
||||
<link linkend="threads.rationale_comparison.non-copyable.loop-join">(4)</link>
|
||||
down to:</para>
|
||||
<programlisting>
|
||||
void foo()
|
||||
{
|
||||
thread_group threads;
|
||||
for (int i=0; i<NUM_THREADS; ++i)
|
||||
threads.create_thread(&bar);
|
||||
threads.join_all();
|
||||
}
|
||||
</programlisting>
|
||||
<para>So ease of use is really a wash and not much help in picking a
|
||||
design.</para>
|
||||
<para>So what about performance? Looking at the above code examples,
|
||||
we can analyze the theoretical impact to performance that both designs
|
||||
have. For <link linkend="threads.rationale_comparison.non-copyable.simple">(1)</link>
|
||||
we can see that platforms that don't have a ref-counted native
|
||||
thread type (POSIX, for instance) will be impacted by a thread_ref
|
||||
design. Even if the native thread type is ref-counted there may be an impact
|
||||
if more state information has to be maintained for concepts foreign to the
|
||||
native API, such as clean up stacks for Win32 implementations.
|
||||
For <link linkend="threads.rationale_comparison.non-copyable.joined">(2)</link>
|
||||
and <link linkend="threads.rationale_comparison.non-copyable.loop">(3)</link>
|
||||
the performance impact will be identical to
|
||||
<link linkend="threads.rationale_comparison.non-copyable.simple">(1)</link>.
|
||||
For <link linkend="threads.rationale_comparison.non-copyable.loop-join">(4)</link>
|
||||
things get a little more interesting and we find that theoretically at least
|
||||
the thread_ref may perform faster since the thread design requires dynamic
|
||||
memory allocation/deallocation. However, in practice there may be dynamic
|
||||
allocation for the thread_ref design as well, it will just be hidden from
|
||||
the user. As long as the implementation has to do dynamic allocations the
|
||||
thread_ref loses again because of the reference management. For
|
||||
<link linkend="threads.rationale_comparison.non-copyable.pass">(5)</link> we see
|
||||
the same impact as we do for
|
||||
<link linkend="threads.rationale_comparison.non-copyable.loop-join">(4)</link>.
|
||||
For <link linkend="threads.rationale_comparison.non-copyable.shared">(6)</link>
|
||||
we still have a possible impact to
|
||||
the thread design because of dynamic allocation but thread_ref no longer
|
||||
suffers because of its reference management, and in fact, theoretically at
|
||||
least, the thread_ref may do a better job of managing the references. All of
|
||||
this indicates that thread wins for
|
||||
<link linkend="threads.rationale_comparison.non-copyable.simple">(1)</link>,
|
||||
<link linkend="threads.rationale_comparison.non-copyable.joined">(2)</link> and
|
||||
<link linkend="threads.rationale_comparison.non-copyable.loop">(3)</link>; with
|
||||
<link linkend="threads.rationale_comparison.non-copyable.loop-join">(4)</link>
|
||||
and <link linkend="threads.rationale_comparison.non-copyable.pass">(5)</link> the
|
||||
winner depending on the implementation and the platform but with the thread design
|
||||
probably having a better chance; and with
|
||||
<link linkend="threads.rationale_comparison.non-copyable.shared">(6)</link>
|
||||
it will again depend on the
|
||||
implementation and platform but this time we favor thread_ref
|
||||
slightly. Given all of this it's a narrow margin, but the thread design
|
||||
prevails.</para>
|
||||
<para>Given this analysis, and the fact that noncopyable objects for system
|
||||
resources are the normal designs that C++ programmers are used to dealing
|
||||
with, the &Boost.Threads; library has gone with a noncopyable design.</para>
|
||||
</section>
|
||||
<section id="threads.rationale.events">
|
||||
<title>Rationale for not providing <emphasis>Event Variables</emphasis></title>
|
||||
<para><emphasis>Event variables</emphasis> are simply far too
|
||||
error-prone. <classname>boost::condition</classname> variables are a much safer
|
||||
alternative. [Note that Graphical User Interface <emphasis>events</emphasis> are
|
||||
a different concept, and are not what is being discussed here.]</para>
|
||||
<para>Event variables were one of the first synchronization primitives. They
|
||||
are still used today, for example, in the native Windows multithreading
|
||||
API. Yet both respected computer science researchers and experienced
|
||||
multithreading practitioners believe event variables are so inherently
|
||||
error-prone that they should never be used, and thus should not be part of a
|
||||
multithreading library.</para>
|
||||
<para>Per Brinch Hansen &cite.Hansen73; analyzed event variables in some
|
||||
detail, pointing out [emphasis his] that "<emphasis>event operations force
|
||||
the programmer to be aware of the relative speeds of the sending and
|
||||
receiving processes</emphasis>". His summary:</para>
|
||||
<blockquote>
|
||||
<para>We must therefore conclude that event variables of the previous type
|
||||
are impractical for system design. <emphasis>The effect of an interaction
|
||||
between two processes must be independent of the speed at which it is
|
||||
carried out.</emphasis></para>
|
||||
</blockquote>
|
||||
<para>Experienced programmers using the Windows platform today report that
|
||||
event variables are a continuing source of errors, even after previous bad
|
||||
experiences caused them to be very careful in their use of event
|
||||
variables. Overt problems can be avoided, for example, by teaming the event
|
||||
variable with a mutex, but that may just convert a <link
|
||||
linkend="threads.glossary.race-condition">race condition</link> into another
|
||||
problem, such as excessive resource use. One of the most distressing aspects
|
||||
of the experience reports is the claim that many defects are latent. That
|
||||
is, the programs appear to work correctly, but contain hidden timing
|
||||
dependencies which will cause them to fail when environmental factors or
|
||||
usage patterns change, altering relative thread timings.</para>
|
||||
<para>The decision to exclude event variables from &Boost.Threads; has been
|
||||
surprising to some Windows programmers. They have written programs which
|
||||
work using event variables, and wonder what the problem is. It seems similar
|
||||
to the "goto considered harmful" controversy of 30 years ago. It isn't that
|
||||
events, like gotos, can't be made to work, but rather that virtually all
|
||||
programs using alternatives will be easier to write, debug, read, maintain,
|
||||
and will be less likely to contain latent defects.</para>
|
||||
<para>[Rationale provided by Beman Dawes]</para>
|
||||
</section>
|
||||
</section>
|
||||
458
doc/read_write_mutex-ref.xml
Normal file
458
doc/read_write_mutex-ref.xml
Normal file
@@ -0,0 +1,458 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<header name="boost/thread/read_write_mutex.hpp"
|
||||
last-revision="$Date$">
|
||||
<namespace name="boost">
|
||||
<namespace name="read_write_scheduling_policy">
|
||||
<enum name="read_write_scheduling_policy">
|
||||
<enumvalue name="writer_priority" />
|
||||
<enumvalue name="reader_priority" />
|
||||
<enumvalue name="alternating_many_reads" />
|
||||
<enumvalue name="alternating_single_read" />
|
||||
|
||||
<purpose>
|
||||
<para>Specifies the
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.inter-class">inter-class sheduling policy</link>
|
||||
to use when a set of threads try to obtain different types of
|
||||
locks simultaneously.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>The only clock type supported by &Boost.Threads; is
|
||||
<code>TIME_UTC</code>. The epoch for <code>TIME_UTC</code>
|
||||
is 1970-01-01 00:00:00.</para>
|
||||
</description>
|
||||
</enum>
|
||||
</namespace>
|
||||
|
||||
<class name="read_write_mutex">
|
||||
<purpose>
|
||||
<para>The <classname>read_write_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.ReadWriteMutex">ReadWriteMutex</link> concept.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>The <classname>read_write_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.ReadWriteMutex">ReadWriteMutex</link> concept.
|
||||
It should be used to synchronize access to shared resources using
|
||||
<link linkend="threads.concepts.read-write-locking-strategies.unspecified">Unspecified</link>
|
||||
locking mechanics.</para>
|
||||
|
||||
<para>For classes that model related mutex concepts, see
|
||||
<classname>try_read_write_mutex</classname> and <classname>timed_read_write_mutex</classname>.</para>
|
||||
|
||||
<para>The <classname>read_write_mutex</classname> class supplies the following typedefs,
|
||||
which <link linkend="threads.concepts.read-write-lock-models">model</link>
|
||||
the specified locking strategies:
|
||||
|
||||
<informaltable>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Lock Name</entry>
|
||||
<entry>Lock Concept</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>scoped_read_write_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedReadWriteLock">ScopedReadWriteLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_read_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedLock">ScopedLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_write_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedLock">ScopedLock</link></entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</para>
|
||||
|
||||
<para>The <classname>read_write_mutex</classname> class uses an
|
||||
<link linkend="threads.concepts.read-write-locking-strategies.unspecified">Unspecified</link>
|
||||
locking strategy, so attempts to recursively lock a <classname>read_write_mutex</classname>
|
||||
object or attempts to unlock one by threads that don't own a lock on it result in
|
||||
<emphasis role="bold">undefined behavior</emphasis>.
|
||||
This strategy allows implementations to be as efficient as possible
|
||||
on any given platform. It is, however, recommended that
|
||||
implementations include debugging support to detect misuse when
|
||||
<code>NDEBUG</code> is not defined.</para>
|
||||
|
||||
<para>Like all
|
||||
<link linkend="threads.concepts.read-write-mutex-models">read/write mutex models</link>
|
||||
in &Boost.Threads;, <classname>read_write_mutex</classname> has two types of
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies">scheduling policies</link>, an
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.inter-class">inter-class sheduling policy</link>
|
||||
between threads trying to obtain different types of locks and an
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.intra-class">intra-class sheduling policy</link>
|
||||
between threads trying to obtain the same type of lock.
|
||||
The <classname>read_write_mutex</classname> class allows the
|
||||
programmer to choose what
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.inter-class">inter-class sheduling policy</link>
|
||||
will be used; however, like all read/write mutex models,
|
||||
<classname>read_write_mutex</classname> leaves the
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.intra-class">intra-class sheduling policy</link> as
|
||||
<link linkend="threads.concepts.read-write-locking-strategies.unspecified">Unspecified</link>.
|
||||
</para>
|
||||
|
||||
<note>Self-deadlock is virtually guaranteed if a thread tries to
|
||||
lock the same <classname>read_write_mutex</classname> multiple times
|
||||
unless all locks are read-locks (but see below)</note>
|
||||
</description>
|
||||
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<typedef name="scoped_read_write_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_read_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_write_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<constructor>
|
||||
<parameter name="count">
|
||||
<paramtype>boost::read_write_scheduling_policy</paramtype>
|
||||
</parameter>
|
||||
|
||||
<effects>Constructs a <classname>read_write_mutex</classname> object.
|
||||
</effects>
|
||||
|
||||
<postconditions><code>*this</code> is in an unlocked state.
|
||||
</postconditions>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects>Destroys a <classname>read_write_mutex</classname> object.</effects>
|
||||
|
||||
<requires><code>*this</code> is in an unlocked state.</requires>
|
||||
|
||||
<notes><emphasis role="bold">Danger:</emphasis> Destruction of a
|
||||
locked mutex is a serious programming error resulting in undefined
|
||||
behavior such as a program crash.</notes>
|
||||
</destructor>
|
||||
</class>
|
||||
|
||||
<class name="try_read_write_mutex">
|
||||
<purpose>
|
||||
<para>The <classname>try_read_write_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.TryReadWriteMutex">TryReadWriteMutex</link> concept.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>The <classname>try_read_write_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.TryReadWriteMutex">TryReadWriteMutex</link> concept.
|
||||
It should be used to synchronize access to shared resources using
|
||||
<link linkend="threads.concepts.read-write-locking-strategies.unspecified">Unspecified</link>
|
||||
locking mechanics.</para>
|
||||
|
||||
<para>For classes that model related mutex concepts, see
|
||||
<classname>read_write_mutex</classname> and <classname>timed_read_write_mutex</classname>.</para>
|
||||
|
||||
<para>The <classname>try_read_write_mutex</classname> class supplies the following typedefs,
|
||||
which <link linkend="threads.concepts.read-write-lock-models">model</link>
|
||||
the specified locking strategies:
|
||||
|
||||
<informaltable>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Lock Name</entry>
|
||||
<entry>Lock Concept</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>scoped_read_write_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedReadWriteLock">ScopedReadWriteLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_try_read_write_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTryReadWriteLock">ScopedTryReadWriteLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_read_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedLock">ScopedLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_try_read_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTryLock">ScopedTryLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_write_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedLock">ScopedLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_try_write_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTryLock">ScopedTryLock</link></entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</para>
|
||||
|
||||
<para>The <classname>try_read_write_mutex</classname> class uses an
|
||||
<link linkend="threads.concepts.read-write-locking-strategies.unspecified">Unspecified</link>
|
||||
locking strategy, so attempts to recursively lock a <classname>try_read_write_mutex</classname>
|
||||
object or attempts to unlock one by threads that don't own a lock on it result in
|
||||
<emphasis role="bold">undefined behavior</emphasis>.
|
||||
This strategy allows implementations to be as efficient as possible
|
||||
on any given platform. It is, however, recommended that
|
||||
implementations include debugging support to detect misuse when
|
||||
<code>NDEBUG</code> is not defined.</para>
|
||||
|
||||
<para>Like all
|
||||
<link linkend="threads.concepts.read-write-mutex-models">read/write mutex models</link>
|
||||
in &Boost.Threads;, <classname>try_read_write_mutex</classname> has two types of
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies">scheduling policies</link>, an
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.inter-class">inter-class sheduling policy</link>
|
||||
between threads trying to obtain different types of locks and an
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.intra-class">intra-class sheduling policy</link>
|
||||
between threads trying to obtain the same type of lock.
|
||||
The <classname>try_read_write_mutex</classname> class allows the
|
||||
programmer to choose what
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.inter-class">inter-class sheduling policy</link>
|
||||
will be used; however, like all read/write mutex models,
|
||||
<classname>try_read_write_mutex</classname> leaves the
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.intra-class">intra-class sheduling policy</link> as
|
||||
<link linkend="threads.concepts.unspecified-scheduling-policy">Unspecified</link>.
|
||||
</para>
|
||||
|
||||
<note>Self-deadlock is virtually guaranteed if a thread tries to
|
||||
lock the same <classname>try_read_write_mutex</classname> multiple times
|
||||
unless all locks are read-locks (but see below)</note>
|
||||
</description>
|
||||
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<typedef name="scoped_read_write_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_try_read_write_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_read_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_try_read_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_write_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_try_write_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<constructor>
|
||||
<parameter name="count">
|
||||
<paramtype>boost::read_write_scheduling_policy</paramtype>
|
||||
</parameter>
|
||||
|
||||
<effects>Constructs a <classname>try_read_write_mutex</classname> object.
|
||||
</effects>
|
||||
|
||||
<postconditions><code>*this</code> is in an unlocked state.
|
||||
</postconditions>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects>Destroys a <classname>try_read_write_mutex</classname> object.</effects>
|
||||
|
||||
<requires><code>*this</code> is in an unlocked state.</requires>
|
||||
|
||||
<notes><emphasis role="bold">Danger:</emphasis> Destruction of a
|
||||
locked mutex is a serious programming error resulting in undefined
|
||||
behavior such as a program crash.</notes>
|
||||
</destructor>
|
||||
</class>
|
||||
|
||||
<class name="timed_read_write_mutex">
|
||||
<purpose>
|
||||
<para>The <classname>timed_read_write_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.TimedReadWriteMutex">TimedReadWriteMutex</link> concept.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>The <classname>timed_read_write_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.TimedReadWriteMutex">TimedReadWriteMutex</link> concept.
|
||||
It should be used to synchronize access to shared resources using
|
||||
<link linkend="threads.concepts.read-write-locking-strategies.unspecified">Unspecified</link>
|
||||
locking mechanics.</para>
|
||||
|
||||
<para>For classes that model related mutex concepts, see
|
||||
<classname>read_write_mutex</classname> and <classname>try_read_write_mutex</classname>.</para>
|
||||
|
||||
<para>The <classname>timed_read_write_mutex</classname> class supplies the following typedefs,
|
||||
which <link linkend="threads.concepts.read-write-lock-models">model</link>
|
||||
the specified locking strategies:
|
||||
|
||||
<informaltable>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Lock Name</entry>
|
||||
<entry>Lock Concept</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>scoped_read_write_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedReadWriteLock">ScopedReadWriteLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_try_read_write_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTryReadWriteLock">ScopedTryReadWriteLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_timed_read_write_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTimedReadWriteLock">ScopedTimedReadWriteLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_read_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedLock">ScopedLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_try_read_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTryLock">ScopedTryLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_timed_read_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTimedLock">ScopedTimedLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_write_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedLock">ScopedLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_try_write_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTryLock">ScopedTryLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_timed_write_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTimedLock">ScopedTimedLock</link></entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</para>
|
||||
|
||||
<para>The <classname>timed_read_write_mutex</classname> class uses an
|
||||
<link linkend="threads.concepts.read-write-locking-strategies.unspecified">Unspecified</link>
|
||||
locking strategy, so attempts to recursively lock a <classname>timed_read_write_mutex</classname>
|
||||
object or attempts to unlock one by threads that don't own a lock on it result in
|
||||
<emphasis role="bold">undefined behavior</emphasis>.
|
||||
This strategy allows implementations to be as efficient as possible
|
||||
on any given platform. It is, however, recommended that
|
||||
implementations include debugging support to detect misuse when
|
||||
<code>NDEBUG</code> is not defined.</para>
|
||||
|
||||
<para>Like all
|
||||
<link linkend="threads.concepts.read-write-mutex-models">read/write mutex models</link>
|
||||
in &Boost.Threads;, <classname>timed_read_write_mutex</classname> has two types of
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies">scheduling policies</link>, an
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.inter-class">inter-class sheduling policy</link>
|
||||
between threads trying to obtain different types of locks and an
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.intra-class">intra-class sheduling policy</link>
|
||||
between threads trying to obtain the same type of lock.
|
||||
The <classname>timed_read_write_mutex</classname> class allows the
|
||||
programmer to choose what
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.inter-class">inter-class sheduling policy</link>
|
||||
will be used; however, like all read/write mutex models,
|
||||
<classname>timed_read_write_mutex</classname> leaves the
|
||||
<link linkend="threads.concepts.read-write-scheduling-policies.intra-class">intra-class sheduling policy</link> as
|
||||
<link linkend="threads.concepts.unspecified-scheduling-policy">Unspecified</link>.
|
||||
</para>
|
||||
|
||||
<note>Self-deadlock is virtually guaranteed if a thread tries to
|
||||
lock the same <classname>timed_read_write_mutex</classname> multiple times
|
||||
unless all locks are read-locks (but see below)</note>
|
||||
</description>
|
||||
|
||||
<typedef name="scoped_read_write_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_try_read_write_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_timed_read_write_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_read_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_try_read_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_timed_read_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_write_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_try_write_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_timed_write_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<constructor>
|
||||
<parameter name="count">
|
||||
<paramtype>boost::read_write_scheduling_policy</paramtype>
|
||||
</parameter>
|
||||
|
||||
<effects>Constructs a <classname>timed_read_write_mutex</classname> object.
|
||||
</effects>
|
||||
|
||||
<postconditions><code>*this</code> is in an unlocked state.
|
||||
</postconditions>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects>Destroys a <classname>timed_read_write_mutex</classname> object.</effects>
|
||||
|
||||
<requires><code>*this</code> is in an unlocked state.</requires>
|
||||
|
||||
<notes><emphasis role="bold">Danger:</emphasis> Destruction of a
|
||||
locked mutex is a serious programming error resulting in undefined
|
||||
behavior such as a program crash.</notes>
|
||||
</destructor>
|
||||
</class>
|
||||
</namespace>
|
||||
</header>
|
||||
302
doc/recursive_mutex-ref.xml
Normal file
302
doc/recursive_mutex-ref.xml
Normal file
@@ -0,0 +1,302 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<header name="boost/thread/recursive_mutex.hpp"
|
||||
last-revision="$Date$">
|
||||
<namespace name="boost">
|
||||
<class name="recursive_mutex">
|
||||
<purpose>
|
||||
<para>The <classname>recursive_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.Mutex">Mutex</link> concept.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>The <classname>recursive_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.Mutex">Mutex</link> concept.
|
||||
It should be used to synchronize access to shared resources using
|
||||
<link linkend="threads.concepts.recursive-locking-strategy">Recursive</link>
|
||||
locking mechanics.</para>
|
||||
|
||||
<para>For classes that model related mutex concepts, see
|
||||
<classname>recursive_try_mutex</classname> and <classname>recursive_timed_mutex</classname>.</para>
|
||||
|
||||
<para>For <link linkend="threads.concepts.unspecified-locking-strategy">Unspecified</link>
|
||||
locking mechanics, see <classname>mutex</classname>,
|
||||
<classname>try_mutex</classname>, and <classname>timed_mutex</classname>.
|
||||
</para>
|
||||
|
||||
<para>The <classname>recursive_mutex</classname> class supplies the following typedef,
|
||||
which models the specified locking strategy:
|
||||
|
||||
<table>
|
||||
<title>Supported Lock Types</title>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Lock Name</entry>
|
||||
<entry>Lock Concept</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>scoped_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedLock">ScopedLock</link></entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
</para>
|
||||
|
||||
<para>The <classname>recursive_mutex</classname> class uses a
|
||||
<link linkend="threads.concepts.recursive-locking-strategy">Recursive</link>
|
||||
locking strategy, so attempts to recursively lock a
|
||||
<classname>recursive_mutex</classname> object
|
||||
succeed and an internal "lock count" is maintained.
|
||||
Attempts to unlock a <classname>recursive_mutex</classname> object
|
||||
by threads that don't own a lock on it result in
|
||||
<emphasis role="bold">undefined behavior</emphasis>.</para>
|
||||
|
||||
<para>Like all
|
||||
<link linkend="threads.concepts.mutex-models">mutex models</link>
|
||||
in &Boost.Threads;, <classname>recursive_mutex</classname> leaves the
|
||||
<link linkend="threads.concepts.sheduling-policies">scheduling policy</link>
|
||||
as <link linkend="threads.concepts.unspecified-scheduling-policy">Unspecified</link>.
|
||||
Programmers should make no assumptions about the order in which
|
||||
waiting threads acquire a lock.</para>
|
||||
</description>
|
||||
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<typedef name="scoped_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<constructor>
|
||||
<effects>Constructs a <classname>recursive_mutex</classname> object.
|
||||
</effects>
|
||||
|
||||
<postconditions><code>*this</code> is in an unlocked state.
|
||||
</postconditions>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects>Destroys a <classname>recursive_mutex</classname> object.</effects>
|
||||
|
||||
<requires><code>*this</code> is in an unlocked state.</requires>
|
||||
|
||||
<notes><emphasis role="bold">Danger:</emphasis> Destruction of a
|
||||
locked mutex is a serious programming error resulting in undefined
|
||||
behavior such as a program crash.</notes>
|
||||
</destructor>
|
||||
</class>
|
||||
|
||||
<class name="recursive_try_mutex">
|
||||
<purpose>
|
||||
<para>The <classname>recursive_try_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.TryMutex">TryMutex</link> concept.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>The <classname>recursive_try_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.TryMutex">TryMutex</link> concept.
|
||||
It should be used to synchronize access to shared resources using
|
||||
<link linkend="threads.concepts.recursive-locking-strategy">Recursive</link>
|
||||
locking mechanics.</para>
|
||||
|
||||
<para>For classes that model related mutex concepts, see
|
||||
<classname>recursive_mutex</classname> and <classname>recursive_timed_mutex</classname>.</para>
|
||||
|
||||
<para>For <link linkend="threads.concepts.unspecified-locking-strategy">Unspecified</link>
|
||||
locking mechanics, see <classname>mutex</classname>,
|
||||
<classname>try_mutex</classname>, and <classname>timed_mutex</classname>.
|
||||
</para>
|
||||
|
||||
<para>The <classname>recursive_try_mutex</classname> class supplies the following typedefs,
|
||||
which model the specified locking strategies:
|
||||
|
||||
<table>
|
||||
<title>Supported Lock Types</title>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Lock Name</entry>
|
||||
<entry>Lock Concept</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>scoped_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedLock">ScopedLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_try_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTryLock">ScopedTryLock</link></entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
</para>
|
||||
|
||||
<para>The <classname>recursive_try_mutex</classname> class uses a
|
||||
<link linkend="threads.concepts.recursive-locking-strategy">Recursive</link>
|
||||
locking strategy, so attempts to recursively lock a
|
||||
<classname>recursive_try_mutex</classname> object
|
||||
succeed and an internal "lock count" is maintained.
|
||||
Attempts to unlock a <classname>recursive_mutex</classname> object
|
||||
by threads that don't own a lock on it result in
|
||||
<emphasis role="bold">undefined behavior</emphasis>.</para>
|
||||
|
||||
<para>Like all
|
||||
<link linkend="threads.concepts.mutex-models">mutex models</link>
|
||||
in &Boost.Threads;, <classname>recursive_try_mutex</classname> leaves the
|
||||
<link linkend="threads.concepts.sheduling-policies">scheduling policy</link>
|
||||
as <link linkend="threads.concepts.unspecified-scheduling-policy">Unspecified</link>.
|
||||
Programmers should make no assumptions about the order in which
|
||||
waiting threads acquire a lock.</para>
|
||||
</description>
|
||||
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<typedef name="scoped_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_try_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<constructor>
|
||||
<effects>Constructs a <classname>recursive_try_mutex</classname> object.
|
||||
</effects>
|
||||
|
||||
<postconditions><code>*this</code> is in an unlocked state.
|
||||
</postconditions>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects>Destroys a <classname>recursive_try_mutex</classname> object.
|
||||
</effects>
|
||||
|
||||
<requires><code>*this</code> is in an unlocked state.</requires>
|
||||
|
||||
<notes><emphasis role="bold">Danger:</emphasis> Destruction of a
|
||||
locked mutex is a serious programming error resulting in undefined
|
||||
behavior such as a program crash.</notes>
|
||||
</destructor>
|
||||
</class>
|
||||
|
||||
<class name="recursive_timed_mutex">
|
||||
<purpose>
|
||||
<para>The <classname>recursive_timed_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.TimedMutex">TimedMutex</link> concept.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>The <classname>recursive_timed_mutex</classname> class is a model of the
|
||||
<link linkend="threads.concepts.TimedMutex">TimedMutex</link> concept.
|
||||
It should be used to synchronize access to shared resources using
|
||||
<link linkend="threads.concepts.recursive-locking-strategy">Recursive</link>
|
||||
locking mechanics.</para>
|
||||
|
||||
<para>For classes that model related mutex concepts, see
|
||||
<classname>recursive_mutex</classname> and <classname>recursive_try_mutex</classname>.</para>
|
||||
|
||||
<para>For <link linkend="threads.concepts.unspecified-locking-strategy">Unspecified</link>
|
||||
locking mechanics, see <classname>mutex</classname>,
|
||||
<classname>try_mutex</classname>, and <classname>timed_mutex</classname>.
|
||||
</para>
|
||||
|
||||
<para>The <classname>recursive_timed_mutex</classname> class supplies the following typedefs,
|
||||
which model the specified locking strategies:
|
||||
|
||||
<table>
|
||||
<title>Supported Lock Types</title>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Lock Name</entry>
|
||||
<entry>Lock Concept</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>scoped_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedLock">ScopedLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_try_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTryLock">ScopedTryLock</link></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>scoped_timed_lock</entry>
|
||||
<entry><link linkend="threads.concepts.ScopedTimedLock">ScopedTimedLock</link></entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
</para>
|
||||
|
||||
<para>The <classname>recursive_timed_mutex</classname> class uses a
|
||||
<link linkend="threads.concepts.recursive-locking-strategy">Recursive</link>
|
||||
locking strategy, so attempts to recursively lock a
|
||||
<classname>recursive_timed_mutex</classname> object
|
||||
succeed and an internal "lock count" is maintained.
|
||||
Attempts to unlock a <classname>recursive_mutex</classname> object
|
||||
by threads that don't own a lock on it result in
|
||||
<emphasis role="bold">undefined behavior</emphasis>.</para>
|
||||
|
||||
<para>Like all
|
||||
<link linkend="threads.concepts.mutex-models">mutex models</link>
|
||||
in &Boost.Threads;, <classname>recursive_timed_mutex</classname> leaves the
|
||||
<link linkend="threads.concepts.sheduling-policies">scheduling policy</link>
|
||||
as <link linkend="threads.concepts.unspecified-scheduling-policy">Unspecified</link>.
|
||||
Programmers should make no assumptions about the order in which
|
||||
waiting threads acquire a lock.</para>
|
||||
</description>
|
||||
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<typedef name="scoped_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_try_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<typedef name="scoped_timed_lock">
|
||||
<type><emphasis>implementation-defined</emphasis></type>
|
||||
</typedef>
|
||||
|
||||
<constructor>
|
||||
<effects>Constructs a <classname>recursive_timed_mutex</classname> object.
|
||||
</effects>
|
||||
|
||||
<postconditions><code>*this</code> is in an unlocked state.
|
||||
</postconditions>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects>Destroys a <classname>recursive_timed_mutex</classname> object.</effects>
|
||||
|
||||
<requires><code>*this</code> is in an unlocked state.</requires>
|
||||
|
||||
<notes><emphasis role="bold">Danger:</emphasis> Destruction of a
|
||||
locked mutex is a serious programming error resulting in undefined
|
||||
behavior such as a program crash.</notes>
|
||||
</destructor>
|
||||
</class>
|
||||
</namespace>
|
||||
</header>
|
||||
20
doc/reference.xml
Normal file
20
doc/reference.xml
Normal file
@@ -0,0 +1,20 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<library-reference id="threads.reference"
|
||||
last-revision="$Date$"
|
||||
xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
<xi:include href="barrier-ref.xml"/>
|
||||
<xi:include href="condition-ref.xml"/>
|
||||
<xi:include href="exceptions-ref.xml"/>
|
||||
<xi:include href="mutex-ref.xml"/>
|
||||
<xi:include href="once-ref.xml"/>
|
||||
<xi:include href="recursive_mutex-ref.xml"/>
|
||||
<xi:include href="read_write_mutex-ref.xml"/>
|
||||
<xi:include href="thread-ref.xml"/>
|
||||
<xi:include href="tss-ref.xml"/>
|
||||
<xi:include href="xtime-ref.xml"/>
|
||||
</library-reference>
|
||||
144
doc/release_notes.xml
Normal file
144
doc/release_notes.xml
Normal file
@@ -0,0 +1,144 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<section id="threads.release_notes" last-revision="$Date$">
|
||||
<title>Release Notes</title>
|
||||
<section id="threads.release_notes.boost_1_32_0">
|
||||
<title>Boost 1.32.0</title>
|
||||
|
||||
<section id="threads.release_notes.boost_1_32_0.change_log.documentation">
|
||||
<title>Documentation converted to BoostBook</title>
|
||||
|
||||
<para>The documentation was converted to BoostBook format,
|
||||
and a number of errors and inconsistencies were
|
||||
fixed in the process.
|
||||
Since this was a fairly large task, there are likely to be
|
||||
more errors and inconsistencies remaining. If you find any,
|
||||
please report them!</para>
|
||||
</section>
|
||||
|
||||
<section id="threads.release_notes.boost_1_32_0.change_log.static_link">
|
||||
<title>Statically-link build option added</title>
|
||||
|
||||
<para>The option to link &Boost.Threads; as a static
|
||||
library has been added (with some limitations on Win32 platforms).
|
||||
This feature was originally removed from an earlier version
|
||||
of Boost because <classname>boost::thread_specific_ptr</classname>
|
||||
required that &Boost.Threads; be dynamically linked in order
|
||||
for its cleanup functionality to work on Win32 platforms.
|
||||
Because this limitation never applied to non-Win32 platforms,
|
||||
because significant progress has been made in removing
|
||||
the limitation on Win32 platforms (many thanks to
|
||||
Aaron LaFramboise and Roland Scwarz!), and because the lack
|
||||
of static linking is one of the most common complaints of
|
||||
&Boost.Threads; users, this decision was reversed.</para>
|
||||
|
||||
<para>On non-Win32 platforms:
|
||||
To choose the dynamically linked version of &Boost.Threads;
|
||||
using Boost's auto-linking feature, #define BOOST_THREAD_USE_DLL;
|
||||
to choose the statically linked version,
|
||||
#define BOOST_THREAD_USE_LIB.
|
||||
If neither symbols is #defined, the default will be chosen.
|
||||
Currently the default is the statically linked version.</para>
|
||||
|
||||
<para>On Win32 platforms using VC++:
|
||||
Use the same #defines as for non-Win32 platforms
|
||||
(BOOST_THREAD_USE_DLL and BOOST_THREAD_USE_LIB).
|
||||
If neither is #defined, the default will be chosen.
|
||||
Currently the default is the statically linked version
|
||||
if the VC++ run-time library is set to
|
||||
"Multi-threaded" or "Multi-threaded Debug", and
|
||||
the dynamically linked version
|
||||
if the VC++ run-time library is set to
|
||||
"Multi-threaded DLL" or "Multi-threaded Debug DLL".</para>
|
||||
|
||||
<para>On Win32 platforms using compilers other than VC++:
|
||||
Use the same #defines as for non-Win32 platforms
|
||||
(BOOST_THREAD_USE_DLL and BOOST_THREAD_USE_LIB).
|
||||
If neither is #defined, the default will be chosen.
|
||||
Currently the default is the dynamically linked version
|
||||
because it has not yet been possible to implement automatic
|
||||
tss cleanup in the statically linked version for compilers
|
||||
other than VC++, although it is hoped that this will be
|
||||
possible in a future version of &Boost.Threads;.
|
||||
|
||||
Note for advanced users: &Boost.Threads; provides several "hook"
|
||||
functions to allow users to experiment with the statically
|
||||
linked version on Win32 with compilers other than VC++.
|
||||
These functions are on_process_enter(), on_process_exit(),
|
||||
on_thread_enter(), and on_thread_exit(), and are defined
|
||||
in tls_hooks.cpp. See the comments in that file for more
|
||||
information.</para>
|
||||
</section>
|
||||
|
||||
<section id="threads.release_notes.boost_1_32_0.change_log.barrier">
|
||||
<title>Barrier functionality added</title>
|
||||
|
||||
<para>A new class, <classname>boost::barrier</classname>, was added.</para>
|
||||
</section>
|
||||
|
||||
<section id="threads.release_notes.boost_1_32_0.change_log.read_write_mutex">
|
||||
<title>Read/write mutex functionality added</title>
|
||||
|
||||
<para>New classes,
|
||||
<classname>boost::read_write_mutex</classname>,
|
||||
<classname>boost::try_read_write_mutex</classname>, and
|
||||
<classname>boost::timed_read_write_mutex</classname>
|
||||
were added.
|
||||
|
||||
<note>Since the read/write mutex and related classes are new,
|
||||
both interface and implementation are liable to change
|
||||
in future releases of &Boost.Threads;.
|
||||
The lock concepts and lock promotion in particular are
|
||||
still under discussion and very likely to change.</note>
|
||||
</para>
|
||||
</section>
|
||||
|
||||
<section id="threads.release_notes.boost_1_32_0.change_log.thread_specific_ptr">
|
||||
<title>Thread-specific pointer functionality changed</title>
|
||||
|
||||
<para>The <classname>boost::thread_specific_ptr</classname>
|
||||
constructor now takes an optional pointer to a cleanup function that
|
||||
is called to release the thread-specific data that is being pointed
|
||||
to by <classname>boost::thread_specific_ptr</classname> objects.</para>
|
||||
|
||||
<para>Fixed: the number of available thread-specific storage "slots"
|
||||
is too small on some platforms.</para>
|
||||
|
||||
<para>Fixed: <functionname>thread_specific_ptr::reset()</functionname>
|
||||
doesn't check error returned by <functionname>tss::set()</functionname>
|
||||
(the <functionname>tss::set()</functionname> function now throws
|
||||
if it fails instead of returning an error code).</para>
|
||||
|
||||
<para>Fixed: calling
|
||||
<functionname>boost::thread_specific_ptr::reset()</functionname> or
|
||||
<functionname>boost::thread_specific_ptr::release()</functionname>
|
||||
causes double-delete: once when
|
||||
<functionname>boost::thread_specific_ptr::reset()</functionname> or
|
||||
<functionname>boost::thread_specific_ptr::release()</functionname>
|
||||
is called and once when
|
||||
<functionname>boost::thread_specific_ptr::~thread_specific_ptr()</functionname>
|
||||
is called.</para>
|
||||
</section>
|
||||
|
||||
<section id="threads.release_notes.boost_1_32_0.change_log.mutex">
|
||||
<title>Mutex implementation changed for Win32</title>
|
||||
|
||||
<para>On Win32, <classname>boost::mutex</classname>,
|
||||
<classname>boost::try_mutex</classname>, <classname>boost::recursive_mutex</classname>,
|
||||
and <classname>boost::recursive_try_mutex</classname> now use a Win32 critical section
|
||||
whenever possible; otherwise they use a Win32 mutex. As before,
|
||||
<classname>boost::timed_mutex</classname> and
|
||||
<classname>boost::recursive_timed_mutex</classname> use a Win32 mutex.</para>
|
||||
</section>
|
||||
|
||||
<section id="threads.release_notes.boost_1_32_0.change_log.wince">
|
||||
<title>Windows CE support improved</title>
|
||||
|
||||
<para>Minor changes were made to make Boost.Threads work on Windows CE.</para>
|
||||
</section>
|
||||
</section>
|
||||
</section>
|
||||
266
doc/thread-ref.xml
Normal file
266
doc/thread-ref.xml
Normal file
@@ -0,0 +1,266 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<header name="boost/thread/thread.hpp"
|
||||
last-revision="$Date$">
|
||||
<namespace name="boost">
|
||||
<class name="thread">
|
||||
<purpose>
|
||||
<para>The <classname>thread</classname> class represents threads of
|
||||
execution, and provides the functionality to create and manage
|
||||
threads within the &Boost.Threads; library. See
|
||||
<xref linkend="threads.glossary"/> for a precise description of
|
||||
<link linkend="threads.glossary.thread">thread of execution</link>,
|
||||
and for definitions of threading-related terms and of thread states such as
|
||||
<link linkend="threads.glossary.thread-state">blocked</link>.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>A <link linkend="threads.glossary.thread">thread of execution</link>
|
||||
has an initial function. For the program's initial thread, the initial
|
||||
function is <code>main()</code>. For other threads, the initial
|
||||
function is <code>operator()</code> of the function object passed to
|
||||
the <classname>thread</classname> object's constructor.</para>
|
||||
|
||||
<para>A thread of execution is said to be "finished"
|
||||
or to have "finished execution" when its initial function returns or
|
||||
is terminated. This includes completion of all thread cleanup
|
||||
handlers, and completion of the normal C++ function return behaviors,
|
||||
such as destruction of automatic storage (stack) objects and releasing
|
||||
any associated implementation resources.</para>
|
||||
|
||||
<para>A thread object has an associated state which is either
|
||||
"joinable" or "non-joinable".</para>
|
||||
|
||||
<para>Except as described below, the policy used by an implementation
|
||||
of &Boost.Threads; to schedule transitions between thread states is
|
||||
unspecified.</para>
|
||||
|
||||
<para><note>Just as the lifetime of a file may be different from the
|
||||
lifetime of an <code>iostream</code> object which represents the file, the lifetime
|
||||
of a thread of execution may be different from the
|
||||
<classname>thread</classname> object which represents the thread of
|
||||
execution. In particular, after a call to <code>join()</code>,
|
||||
the thread of execution will no longer exist even though the
|
||||
<classname>thread</classname> object continues to exist until the
|
||||
end of its normal lifetime. The converse is also possible; if
|
||||
a <classname>thread</classname> object is destroyed without
|
||||
<code>join()</code> first having been called, the thread of execution
|
||||
continues until its initial function completes.</note></para>
|
||||
</description>
|
||||
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<constructor>
|
||||
<effects>Constructs a <classname>thread</classname> object
|
||||
representing the current thread of execution.</effects>
|
||||
|
||||
<postconditions><code>*this</code> is non-joinable.</postconditions>
|
||||
|
||||
<notes><emphasis role="bold">Danger:</emphasis>
|
||||
<code>*this</code> is valid only within the current thread.</notes>
|
||||
</constructor>
|
||||
|
||||
<constructor specifiers="explicit">
|
||||
<parameter name="threadfunc">
|
||||
<paramtype>const boost::function0<void>&</paramtype>
|
||||
</parameter>
|
||||
|
||||
<effects>
|
||||
Starts a new thread of execution and constructs a
|
||||
<classname>thread</classname> object representing it.
|
||||
Copies <code>threadfunc</code> (which in turn copies
|
||||
the function object wrapped by <code>threadfunc</code>)
|
||||
to an internal location which persists for the lifetime
|
||||
of the new thread of execution. Calls <code>operator()</code>
|
||||
on the copy of the <code>threadfunc</code> function object
|
||||
in the new thread of execution.
|
||||
</effects>
|
||||
|
||||
<postconditions><code>*this</code> is joinable.</postconditions>
|
||||
|
||||
<throws><code>boost::thread_resource_error</code> if a new thread
|
||||
of execution cannot be started.</throws>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects>Destroys <code>*this</code>. The actual thread of
|
||||
execution may continue to execute after the
|
||||
<classname>thread</classname> object has been destroyed.
|
||||
</effects>
|
||||
|
||||
<notes>If <code>*this</code> is joinable the actual thread
|
||||
of execution becomes "detached". Any resources used
|
||||
by the thread will be reclaimed when the thread of execution
|
||||
completes. To ensure such a thread of execution runs to completion
|
||||
before the <classname>thread</classname> object is destroyed, call
|
||||
<code>join()</code>.</notes>
|
||||
</destructor>
|
||||
|
||||
<method-group name="comparison">
|
||||
<method name="operator==" cv="const">
|
||||
<type>bool</type>
|
||||
|
||||
<parameter name="rhs">
|
||||
<type>const thread&</type>
|
||||
</parameter>
|
||||
|
||||
<requires>The thread is non-terminated or <code>*this</code>
|
||||
is joinable.</requires>
|
||||
|
||||
<returns><code>true</code> if <code>*this</code> and
|
||||
<code>rhs</code> represent the same thread of
|
||||
execution.</returns>
|
||||
</method>
|
||||
|
||||
<method name="operator!=" cv="const">
|
||||
<type>bool</type>
|
||||
|
||||
<parameter name="rhs">
|
||||
<type>const thread&</type>
|
||||
</parameter>
|
||||
|
||||
<requires>The thread is non-terminated or <code>*this</code>
|
||||
is joinable.</requires>
|
||||
|
||||
<returns><code>!(*this==rhs)</code>.</returns>
|
||||
</method>
|
||||
</method-group>
|
||||
|
||||
<method-group name="modifier">
|
||||
<method name="join">
|
||||
<type>void</type>
|
||||
|
||||
<requires><code>*this</code> is joinable.</requires>
|
||||
|
||||
<effects>The current thread of execution blocks until the
|
||||
initial function of the thread of execution represented by
|
||||
<code>*this</code> finishes and all resources are
|
||||
reclaimed.</effects>
|
||||
|
||||
<postcondition><code>*this</code> is non-joinable.</postcondition>
|
||||
|
||||
<notes>If <code>*this == thread()</code> the result is
|
||||
implementation-defined. If the implementation doesn't
|
||||
detect this the result will be
|
||||
<link linkend="threads.glossary.deadlock">deadlock</link>.
|
||||
</notes>
|
||||
</method>
|
||||
</method-group>
|
||||
|
||||
<method-group name="static">
|
||||
<method name="sleep" specifiers="static">
|
||||
<type>void</type>
|
||||
|
||||
<parameter name="xt">
|
||||
<paramtype>const <classname>xtime</classname>&</paramtype>
|
||||
</parameter>
|
||||
|
||||
<effects>The current thread of execution blocks until
|
||||
<code>xt</code> is reached.</effects>
|
||||
</method>
|
||||
|
||||
<method name="yield" specifiers="static">
|
||||
<type>void</type>
|
||||
|
||||
<effects>The current thread of execution is placed in the
|
||||
<link linkend="threads.glossary.thread-state">ready</link>
|
||||
state.</effects>
|
||||
|
||||
<notes>
|
||||
<simpara>Allow the current thread to give up the rest of its
|
||||
time slice (or other scheduling quota) to another thread.
|
||||
Particularly useful in non-preemptive implementations.</simpara>
|
||||
</notes>
|
||||
</method>
|
||||
</method-group>
|
||||
</class>
|
||||
|
||||
<class name="thread_group">
|
||||
<purpose>
|
||||
The <classname>thread_group</classname> class provides a container
|
||||
for easy grouping of threads to simplify several common thread
|
||||
creation and management idioms.
|
||||
</purpose>
|
||||
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
|
||||
<constructor>
|
||||
<effects>Constructs an empty <classname>thread_group</classname>
|
||||
container.</effects>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects>Destroys each contained thread object. Destroys <code>*this</code>.</effects>
|
||||
|
||||
<notes>Behavior is undefined if another thread references
|
||||
<code>*this </code> during the execution of the destructor.
|
||||
</notes>
|
||||
</destructor>
|
||||
|
||||
<method-group name="modifier">
|
||||
<method name="create_thread">
|
||||
<type><classname>thread</classname>*</type>
|
||||
|
||||
<parameter name="threadfunc">
|
||||
<paramtype>const boost::function0<void>&</paramtype>
|
||||
</parameter>
|
||||
|
||||
<effects>Creates a new <classname>thread</classname> object
|
||||
that executes <code>threadfunc</code> and adds it to the
|
||||
<code>thread_group</code> container object's list of managed
|
||||
<classname>thread</classname> objects.</effects>
|
||||
|
||||
<returns>Pointer to the newly created
|
||||
<classname>thread</classname> object.</returns>
|
||||
</method>
|
||||
|
||||
<method name="add_thread">
|
||||
<type>void</type>
|
||||
|
||||
<parameter name="thrd">
|
||||
<paramtype><classname>thread</classname>* thrd</paramtype>
|
||||
</parameter>
|
||||
|
||||
<effects>Adds <code>thrd</code> to the
|
||||
<classname>thread_group</classname> object's list of managed
|
||||
<classname>thread</classname> objects. The <code>thrd</code>
|
||||
object must have been allocated via <code>operator new</code> and will
|
||||
be deleted when the group is destroyed.</effects>
|
||||
</method>
|
||||
|
||||
<method name="remove_thread">
|
||||
<type>void</type>
|
||||
|
||||
<parameter name="thrd">
|
||||
<paramtype><classname>thread</classname>* thrd</paramtype>
|
||||
</parameter>
|
||||
|
||||
<effects>Removes <code>thread</code> from <code>*this</code>'s
|
||||
list of managed <classname>thread</classname> objects.</effects>
|
||||
|
||||
<throws><emphasis role="bold">???</emphasis> if
|
||||
<code>thrd</code> is not in <code>*this</code>'s list
|
||||
of managed <classname>thread</classname> objects.</throws>
|
||||
</method>
|
||||
|
||||
<method name="join_all">
|
||||
<type>void</type>
|
||||
|
||||
<effects>Calls <code>join()</code> on each of the managed
|
||||
<classname>thread</classname> objects.</effects>
|
||||
</method>
|
||||
</method-group>
|
||||
</class>
|
||||
</namespace>
|
||||
</header>
|
||||
49
doc/thread.xml
Normal file
49
doc/thread.xml
Normal file
@@ -0,0 +1,49 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<library name="Threads" dirname="thread" id="threads"
|
||||
last-revision="$Date$"
|
||||
xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
<libraryinfo>
|
||||
<author>
|
||||
<firstname>William</firstname>
|
||||
<othername>E.</othername>
|
||||
<surname>Kempf</surname>
|
||||
</author>
|
||||
<copyright>
|
||||
<year>2001</year>
|
||||
<year>2002</year>
|
||||
<year>2003</year>
|
||||
<holder>William E. Kempf</holder>
|
||||
</copyright>
|
||||
<legalnotice>
|
||||
<para>Permission to use, copy, modify, distribute and sell this
|
||||
software and its documentation for any purpose is hereby granted
|
||||
without fee, provided that the above copyright notice appear in all
|
||||
copies and that both that copyright notice and this permission notice
|
||||
appear in supporting documentation. William E. Kempf makes no
|
||||
representations about the suitability of this software for any purpose.
|
||||
It is provided "as is" without express or implied warranty.</para>
|
||||
</legalnotice>
|
||||
<librarypurpose>Portable C++ multi-threading</librarypurpose>
|
||||
<librarycategory name="category:concurrent" />
|
||||
<title>Boost.Threads</title>
|
||||
</libraryinfo>
|
||||
<title>Boost.Threads</title>
|
||||
<xi:include href="overview.xml"/>
|
||||
<xi:include href="design.xml"/>
|
||||
<xi:include href="concepts.xml"/>
|
||||
<xi:include href="rationale.xml"/>
|
||||
<xi:include href="reference.xml"/>
|
||||
<xi:include href="faq.xml"/>
|
||||
<xi:include href="configuration.xml"/>
|
||||
<xi:include href="build.xml"/>
|
||||
<xi:include href="implementation_notes.xml"/>
|
||||
<xi:include href="release_notes.xml"/>
|
||||
<xi:include href="glossary.xml"/>
|
||||
<xi:include href="acknowledgements.xml"/>
|
||||
<xi:include href="bibliography.xml"/>
|
||||
</library>
|
||||
202
doc/tss-ref.xml
Normal file
202
doc/tss-ref.xml
Normal file
@@ -0,0 +1,202 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<header name="boost/thread/tss.hpp"
|
||||
last-revision="$Date$">
|
||||
<namespace name="boost">
|
||||
<class name="thread_specific_ptr">
|
||||
<purpose>
|
||||
The <classname>thread_specific_ptr</classname> class defines
|
||||
an interface for using thread specific storage.
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>Thread specific storage is data associated with
|
||||
individual threads and is often used to make operations
|
||||
that rely on global data
|
||||
<link linkend="threads.glossary.thread-safe">thread-safe</link>.
|
||||
</para>
|
||||
|
||||
<para>Template <classname>thread_specific_ptr</classname>
|
||||
stores a pointer to an object obtained on a thread-by-thread
|
||||
basis and calls a specified cleanup handler on the contained
|
||||
pointer when the thread terminates. The cleanup handlers are
|
||||
called in the reverse order of construction of the
|
||||
<classname>thread_specific_ptr</classname>s, and for the
|
||||
initial thread are called by the destructor, providing the
|
||||
same ordering guarantees as for normal declarations. Each
|
||||
thread initially stores the null pointer in each
|
||||
<classname>thread_specific_ptr</classname> instance.</para>
|
||||
|
||||
<para>The template <classname>thread_specific_ptr</classname>
|
||||
is useful in the following cases:
|
||||
<itemizedlist>
|
||||
<listitem>An interface was originally written assuming
|
||||
a single thread of control and it is being ported to a
|
||||
multithreaded environment.</listitem>
|
||||
|
||||
<listitem>Each thread of control invokes sequences of
|
||||
methods that share data that are physically unique
|
||||
for each thread, but must be logically accessed
|
||||
through a globally visible access point instead of
|
||||
being explicitly passed.</listitem>
|
||||
</itemizedlist>
|
||||
</para>
|
||||
</description>
|
||||
|
||||
<inherit access="private">
|
||||
<type><classname>boost::noncopyable</classname></type>
|
||||
<purpose>Exposition only</purpose>
|
||||
</inherit>
|
||||
|
||||
<constructor>
|
||||
<requires>The expression <code>delete get()</code> is well
|
||||
formed.</requires>
|
||||
|
||||
<effects>A thread-specific data key is allocated and visible to
|
||||
all threads in the process. Upon creation, the value
|
||||
<code>NULL</code> will be associated with the new key in all
|
||||
active threads. A cleanup method is registered with the key
|
||||
that will call <code>delete</code> on the value associated
|
||||
with the key for a thread when it exits. When a thread exits,
|
||||
if a key has a registered cleanup method and the thread has a
|
||||
non-<code>NULL</code> value associated with that key, the value
|
||||
of the key is set to <code>NULL</code> and then the cleanup
|
||||
method is called with the previously associated value as its
|
||||
sole argument. The order in which registered cleanup methods
|
||||
are called when a thread exits is undefined. If after all the
|
||||
cleanup methods have been called for all non-<code>NULL</code>
|
||||
values, there are still some non-<code>NULL</code> values
|
||||
with associated cleanup handlers the result is undefined
|
||||
behavior.</effects>
|
||||
|
||||
<throws><classname>boost::thread_resource_error</classname> if
|
||||
the necessary resources can not be obtained.</throws>
|
||||
|
||||
<notes>There may be an implementation specific limit to the
|
||||
number of thread specific storage objects that can be created,
|
||||
and this limit may be small.</notes>
|
||||
|
||||
<rationale>The most common need for cleanup will be to call
|
||||
<code>delete</code> on the associated value. If other forms
|
||||
of cleanup are required the overloaded constructor should be
|
||||
called instead.</rationale>
|
||||
</constructor>
|
||||
|
||||
<constructor>
|
||||
<parameter name="cleanup">
|
||||
<paramtype>void (*cleanup)(void*)</paramtype>
|
||||
</parameter>
|
||||
|
||||
<effects>A thread-specific data key is allocated and visible to
|
||||
all threads in the process. Upon creation, the value
|
||||
<code>NULL</code> will be associated with the new key in all
|
||||
active threads. The <code>cleanup</code> method is registered
|
||||
with the key and will be called for a thread with the value
|
||||
associated with the key for that thread when it exits. When a
|
||||
thread exits, if a key has a registered cleanup method and the
|
||||
thread has a non-<code>NULL</code> value associated with that
|
||||
key, the value of the key is set to <code>NULL</code> and then
|
||||
the cleanup method is called with the previously associated
|
||||
value as its sole argument. The order in which registered
|
||||
cleanup methods are called when a thread exits is undefined.
|
||||
If after all the cleanup methods have been called for all
|
||||
non-<code>NULL</code> values, there are still some
|
||||
non-<code>NULL</code> values with associated cleanup handlers
|
||||
the result is undefined behavior.</effects>
|
||||
|
||||
<throws><classname>boost::thread_resource_error</classname> if
|
||||
the necessary resources can not be obtained.</throws>
|
||||
|
||||
<notes>There may be an implementation specific limit to the
|
||||
number of thread specific storage objects that can be created,
|
||||
and this limit may be small.</notes>
|
||||
|
||||
<rationale>There is the occasional need to register
|
||||
specialized cleanup methods, or to register no cleanup method
|
||||
at all (done by passing <code>NULL</code> to this constructor.
|
||||
</rationale>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects>Deletes the thread-specific data key allocated by the
|
||||
constructor. The thread-specific data values associated with
|
||||
the key need not be <code>NULL</code>. It is the responsibility
|
||||
of the application to perform any cleanup actions for data
|
||||
associated with the key.</effects>
|
||||
|
||||
<notes>Does not destroy any data that may be stored in any
|
||||
thread's thread specific storage. For this reason you should
|
||||
not destroy a <classname>thread_specific_ptr</classname> object
|
||||
until you are certain there are no threads running that have
|
||||
made use of its thread specific storage.</notes>
|
||||
|
||||
<rationale>Associated data is not cleaned up because registered
|
||||
cleanup methods need to be run in the thread that allocated the
|
||||
associated data to be guarranteed to work correctly. There's no
|
||||
safe way to inject the call into another thread's execution
|
||||
path, making it impossible to call the cleanup methods safely.
|
||||
</rationale>
|
||||
</destructor>
|
||||
|
||||
<method-group name="modifier functions">
|
||||
<method name="release">
|
||||
<type>T*</type>
|
||||
|
||||
<postconditions><code>*this</code> holds the null pointer
|
||||
for the current thread.</postconditions>
|
||||
|
||||
<returns><code>this->get()</code> prior to the call.</returns>
|
||||
|
||||
<rationale>This method provides a mechanism for the user to
|
||||
relinquish control of the data associated with the
|
||||
thread-specific key.</rationale>
|
||||
</method>
|
||||
|
||||
<method name="reset">
|
||||
<type>void</type>
|
||||
|
||||
<parameter name="p">
|
||||
<paramtype>T*</paramtype>
|
||||
<default>0</default>
|
||||
</parameter>
|
||||
|
||||
<effects>If <code>this->get() != p &&
|
||||
this->get() != NULL</code> then call the
|
||||
associated cleanup function.</effects>
|
||||
|
||||
<postconditions><code>*this</code> holds the pointer
|
||||
<code>p</code> for the current thread.</postconditions>
|
||||
</method>
|
||||
</method-group>
|
||||
|
||||
<method-group name="observer functions">
|
||||
<method name="get" cv="const">
|
||||
<type>T*</type>
|
||||
|
||||
<returns>The object stored in thread specific storage for
|
||||
the current thread for <code>*this</code>.</returns>
|
||||
|
||||
<notes>Each thread initially returns 0.</notes>
|
||||
</method>
|
||||
|
||||
<method name="operator->" cv="const">
|
||||
<type>T*</type>
|
||||
|
||||
<returns><code>this->get()</code>.</returns>
|
||||
</method>
|
||||
|
||||
<method name="operator*()" cv="const">
|
||||
<type>T&</type>
|
||||
|
||||
<requires><code>this->get() != 0</code></requires>
|
||||
|
||||
<returns><code>this->get()</code>.</returns>
|
||||
</method>
|
||||
</method-group>
|
||||
</class>
|
||||
</namespace>
|
||||
</header>
|
||||
78
doc/xtime-ref.xml
Normal file
78
doc/xtime-ref.xml
Normal file
@@ -0,0 +1,78 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd" [
|
||||
<!ENTITY % threads.entities SYSTEM "entities.xml">
|
||||
%threads.entities;
|
||||
]>
|
||||
<header name="boost/thread/xtime.hpp"
|
||||
last-revision="$Date$">
|
||||
<namespace name="boost">
|
||||
<enum name="xtime_clock_types">
|
||||
<enumvalue name="TIME_UTC" />
|
||||
|
||||
<purpose>
|
||||
<para>Specifies the clock type to use when creating
|
||||
an object of type <classname>xtime</classname>.</para>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<para>The only clock type supported by &Boost.Threads; is
|
||||
<code>TIME_UTC</code>. The epoch for <code>TIME_UTC</code>
|
||||
is 1970-01-01 00:00:00.</para>
|
||||
</description>
|
||||
</enum>
|
||||
|
||||
<struct name="xtime">
|
||||
<purpose>
|
||||
<simpara>An object of type <classname>xtime</classname>
|
||||
defines a time that is used to perform high-resolution time operations.
|
||||
This is a temporary solution that will be replaced by a more robust time
|
||||
library once available in Boost.</simpara>
|
||||
</purpose>
|
||||
|
||||
<description>
|
||||
<simpara>The <classname>xtime</classname> type is used to represent a point on
|
||||
some time scale or a duration in time. This type may be proposed for the C standard by
|
||||
Markus Kuhn. &Boost.Threads; provides only a very minimal implementation of this
|
||||
proposal; it is expected that a full implementation (or some other time
|
||||
library) will be provided in Boost as a separate library, at which time &Boost.Threads;
|
||||
will deprecate its own implementation.</simpara>
|
||||
|
||||
<simpara><emphasis role="bold">Note</emphasis> that the resolution is
|
||||
implementation specific. For many implementations the best resolution
|
||||
of time is far more than one nanosecond, and even when the resolution
|
||||
is reasonably good, the latency of a call to <code>xtime_get()</code>
|
||||
may be significant. For maximum portability, avoid durations of less than
|
||||
one second.</simpara>
|
||||
</description>
|
||||
|
||||
<free-function-group name="creation">
|
||||
<function name="xtime_get">
|
||||
<type>int</type>
|
||||
|
||||
<parameter name="xtp">
|
||||
<paramtype><classname>xtime</classname>*</paramtype>
|
||||
</parameter>
|
||||
|
||||
<parameter name="clock_type">
|
||||
<paramtype>int</paramtype>
|
||||
</parameter>
|
||||
|
||||
<postconditions>
|
||||
<simpara><code>xtp</code> represents the current point in
|
||||
time as a duration since the epoch specified by
|
||||
<code>clock_type</code>.</simpara>
|
||||
</postconditions>
|
||||
|
||||
<returns>
|
||||
<simpara><code>clock_type</code> if successful, otherwise 0.</simpara>
|
||||
</returns>
|
||||
</function>
|
||||
</free-function-group>
|
||||
|
||||
<data-member name="sec">
|
||||
<type><emphasis>platform-specific-type</emphasis></type>
|
||||
</data-member>
|
||||
</struct>
|
||||
</namespace>
|
||||
</header>
|
||||
2
example/.cvsignore
Normal file
2
example/.cvsignore
Normal file
@@ -0,0 +1,2 @@
|
||||
bin
|
||||
*.pdb
|
||||
@@ -0,0 +1,52 @@
|
||||
# Copyright (C) 2006 Roland Schwarz.
|
||||
# Distributed under the Boost Software License, Version 1.0. (See
|
||||
# accompanying file LICENSE_1_0.txt or copy at
|
||||
# http://www.boost.org/LICENSE_1_0.txt)
|
||||
#
|
||||
# This work is a reimplementation along the design and ideas
|
||||
# of William E. Kempf.
|
||||
#
|
||||
|
||||
# The threading library is available in two versions.
|
||||
# Native to the environment or based ontop pthread.
|
||||
# To select which version to use you need to define
|
||||
# BOOST_THREAD_POSIX when compiling your sources.
|
||||
# If BOOST_THREAD_POSIX is defined this will choose
|
||||
# pthread implementation.
|
||||
# You also need to specify the correct library version by
|
||||
# specifying the the <lib> or <dll> tags.
|
||||
# <lib>@boost/libs/thread/build/boost_thread for static native and
|
||||
# <lib>@boost/libs/thread/build/boost_thread_pthread static pthread.
|
||||
# If your compiler does not have the pthread lib in a standard
|
||||
# include path, you need to specify that too, with <include> and
|
||||
# <library-file>.
|
||||
|
||||
project-root ;
|
||||
|
||||
template example
|
||||
: ## sources ##
|
||||
<lib>@boost/libs/thread/build/boost_thread
|
||||
#<lib>@boost/libs/thread/build/boost_thread_pthread
|
||||
#<dll>@boost/libs/thread/build/boost_thread
|
||||
#<dll>@boost/libs/thread/build/boost_thread_pthread
|
||||
: ## requirements ##
|
||||
<include>$(BOOST_ROOT)
|
||||
# uncomment below to get pthread on windows
|
||||
#<define>BOOST_THREAD_POSIX
|
||||
#<include>$(PTW32_INCLUDE)
|
||||
#<library-file>$(PTW32_LIB)
|
||||
: ## default build ##
|
||||
<threading>multi
|
||||
;
|
||||
|
||||
exe monitor : <template>example monitor.cpp ;
|
||||
exe starvephil : <template>example starvephil.cpp ;
|
||||
exe tennis : <template>example tennis.cpp ;
|
||||
exe condition : <template>example condition.cpp ;
|
||||
exe mutex : <template>example mutex.cpp ;
|
||||
exe once : <template>example once.cpp ;
|
||||
exe recursive_mutex : <template>example recursive_mutex.cpp ;
|
||||
exe thread : <template>example thread.cpp ;
|
||||
exe thread_group : <template>example thread_group.cpp ;
|
||||
exe tss : <template>example tss.cpp ;
|
||||
exe xtime : <template>example xtime.cpp ;
|
||||
|
||||
5
example/Jamfile.v2
Normal file
5
example/Jamfile.v2
Normal file
@@ -0,0 +1,5 @@
|
||||
|
||||
exe starvephil
|
||||
: starvephil.cpp ../build/boost_thread ../../test/build/unit_test_framework
|
||||
;
|
||||
|
||||
53
example/Jamrules
Normal file
53
example/Jamrules
Normal file
@@ -0,0 +1,53 @@
|
||||
# Copyright 2003 William E. Kempf
|
||||
# Copyright 2006 Roland Schwarz
|
||||
# Distributed under the Boost Software License, Version 1.0. (See
|
||||
# accompanying file LICENSE_1_0.txt or copy at
|
||||
# http://www.boost.org/LICENSE_1_0.txt)
|
||||
#
|
||||
# This work is a reimplementation along the design and ideas
|
||||
# of William E. Kempf.
|
||||
|
||||
project example ;
|
||||
|
||||
# If you move this example from its place in the Boost tree, edit this
|
||||
# path to point at the root directory of your Boost installation (the
|
||||
# one containing a subdirectory called "boost/".
|
||||
path-global BOOST_ROOT : ../../.. ;
|
||||
|
||||
# Makes a project id for boost so that other Boost.Build projects can
|
||||
# refer to it by name.
|
||||
#
|
||||
project boost : $(BOOST_ROOT) ;
|
||||
|
||||
# Attn: path-global was broken in my version of bbv1, which prevented specifying
|
||||
# BOOST_ROOT as a relative path. So I needed to apply
|
||||
# the below fix in allyourbase.jam as shown below:
|
||||
#
|
||||
#rule project ( name : location ? )
|
||||
#{
|
||||
# if ! $(location)
|
||||
# {
|
||||
# gPROJECT($(name)) = $(gPROJECT($(PROJECT))) ;
|
||||
# PROJECT($(gPROJECT($(name)))) = $(name) ;
|
||||
# PROJECT = $(name) ;
|
||||
# }
|
||||
# else
|
||||
# {
|
||||
# gPROJECT($(name)) = [ root-paths $(location) : [ root-paths $($(gTOP)) : [ PWD ] ] ] ;
|
||||
# # speedsnail
|
||||
# # Root the path globals to fix a bug which prevented to use them from an external
|
||||
# # project. The fix is as as uninvasive as possible, as it will only trigger when
|
||||
# # an external project is declared. So it will not interfere with the build of the
|
||||
# # boost library. I took this route, as at the time of this fix, the bbv1 is expected
|
||||
# # to be retired soon.
|
||||
# # N.B.: The path-globals rule is expected to be invoked from Jamrules files only.
|
||||
# local val ;
|
||||
# for val in $(gPATH_GLOBALS) {
|
||||
# gPATH_GLOBAL_VALUE($(val)) = [ root-paths $(gPATH_GLOBAL_VALUE($(val))) :
|
||||
# [ root-paths $($(gTOP)) : [ PWD ] ]
|
||||
# ] ;
|
||||
# }
|
||||
# local [ protect-subproject ] ;
|
||||
# enter-subproject @$(name) ;
|
||||
# }
|
||||
#}
|
||||
22
example/boost-build.jam
Executable file
22
example/boost-build.jam
Executable file
@@ -0,0 +1,22 @@
|
||||
# Copyright 2006 Roland Schwarz.
|
||||
# Distributed under the Boost Software License, Version 1.0. (See
|
||||
# accompanying file LICENSE_1_0.txt or copy at
|
||||
# http://www.boost.org/LICENSE_1_0.txt)
|
||||
#
|
||||
# This work is a reimplementation along the design and ideas
|
||||
# of William E. Kempf.
|
||||
#
|
||||
|
||||
# Edit this path to point at the tools/build/v1 subdirectory of your
|
||||
# Boost installation.
|
||||
|
||||
if --v2 in $(ARGV)
|
||||
{
|
||||
JAMFILE = [Bb]uild.jam [Jj]amfile.v2 ;
|
||||
boost-build ../../../tools/build/v2 ;
|
||||
}
|
||||
else
|
||||
{
|
||||
boost-build ../../../tools/build/v1 ;
|
||||
}
|
||||
|
||||
75
example/condition.cpp
Normal file
75
example/condition.cpp
Normal file
@@ -0,0 +1,75 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Distributed under the Boost Software License, Version 1.0 (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt
|
||||
//
|
||||
|
||||
#include <iostream>
|
||||
#include <vector>
|
||||
#include <boost/utility.hpp>
|
||||
#include <boost/thread/condition.hpp>
|
||||
#include <boost/thread/thread.hpp>
|
||||
|
||||
class bounded_buffer : private boost::noncopyable
|
||||
{
|
||||
public:
|
||||
typedef boost::mutex::scoped_lock lock;
|
||||
|
||||
bounded_buffer(int n) : begin(0), end(0), buffered(0), circular_buf(n) { }
|
||||
|
||||
void send (int m) {
|
||||
lock lk(monitor);
|
||||
while (buffered == circular_buf.size())
|
||||
buffer_not_full.wait(lk);
|
||||
circular_buf[end] = m;
|
||||
end = (end+1) % circular_buf.size();
|
||||
++buffered;
|
||||
buffer_not_empty.notify_one();
|
||||
}
|
||||
int receive() {
|
||||
lock lk(monitor);
|
||||
while (buffered == 0)
|
||||
buffer_not_empty.wait(lk);
|
||||
int i = circular_buf[begin];
|
||||
begin = (begin+1) % circular_buf.size();
|
||||
--buffered;
|
||||
buffer_not_full.notify_one();
|
||||
return i;
|
||||
}
|
||||
|
||||
private:
|
||||
int begin, end;
|
||||
std::vector<int>::size_type buffered;
|
||||
std::vector<int> circular_buf;
|
||||
boost::condition buffer_not_full, buffer_not_empty;
|
||||
boost::mutex monitor;
|
||||
};
|
||||
|
||||
bounded_buffer buf(2);
|
||||
|
||||
void sender() {
|
||||
int n = 0;
|
||||
while (n < 100) {
|
||||
buf.send(n);
|
||||
std::cout << "sent: " << n << std::endl;
|
||||
++n;
|
||||
}
|
||||
buf.send(-1);
|
||||
}
|
||||
|
||||
void receiver() {
|
||||
int n;
|
||||
do {
|
||||
n = buf.receive();
|
||||
std::cout << "received: " << n << std::endl;
|
||||
} while (n != -1); // -1 indicates end of buffer
|
||||
}
|
||||
|
||||
int main(int, char*[])
|
||||
{
|
||||
boost::thread thrd1(&sender);
|
||||
boost::thread thrd2(&receiver);
|
||||
thrd1.join();
|
||||
thrd2.join();
|
||||
return 0;
|
||||
}
|
||||
112
example/monitor.cpp
Normal file
112
example/monitor.cpp
Normal file
@@ -0,0 +1,112 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Distributed under the Boost Software License, Version 1.0 (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt
|
||||
//
|
||||
|
||||
#include <vector>
|
||||
#include <iostream>
|
||||
#include <boost/thread/condition.hpp>
|
||||
#include <boost/thread/mutex.hpp>
|
||||
#include <boost/thread/recursive_mutex.hpp>
|
||||
#include <boost/thread/thread.hpp>
|
||||
|
||||
namespace {
|
||||
const int ITERS = 100;
|
||||
boost::mutex io_mutex;
|
||||
} // namespace
|
||||
|
||||
template <typename M>
|
||||
class buffer_t
|
||||
{
|
||||
public:
|
||||
typedef typename M::scoped_lock scoped_lock;
|
||||
|
||||
buffer_t(int n)
|
||||
: p(0), c(0), full(0), buf(n)
|
||||
{
|
||||
}
|
||||
|
||||
void send(int m)
|
||||
{
|
||||
scoped_lock lk(mutex);
|
||||
while (full == buf.size())
|
||||
cond.wait(lk);
|
||||
buf[p] = m;
|
||||
p = (p+1) % buf.size();
|
||||
++full;
|
||||
cond.notify_one();
|
||||
}
|
||||
int receive()
|
||||
{
|
||||
scoped_lock lk(mutex);
|
||||
while (full == 0)
|
||||
cond.wait(lk);
|
||||
int i = buf[c];
|
||||
c = (c+1) % buf.size();
|
||||
--full;
|
||||
cond.notify_one();
|
||||
return i;
|
||||
}
|
||||
|
||||
static buffer_t& get_buffer()
|
||||
{
|
||||
static buffer_t buf(2);
|
||||
return buf;
|
||||
}
|
||||
|
||||
static void do_sender_thread()
|
||||
{
|
||||
for (int n = 0; n < ITERS; ++n)
|
||||
{
|
||||
{
|
||||
boost::mutex::scoped_lock lock(io_mutex);
|
||||
std::cout << "sending: " << n << std::endl;
|
||||
}
|
||||
get_buffer().send(n);
|
||||
}
|
||||
}
|
||||
|
||||
static void do_receiver_thread()
|
||||
{
|
||||
for (int x=0; x < (ITERS/2); ++x)
|
||||
{
|
||||
int n = get_buffer().receive();
|
||||
{
|
||||
boost::mutex::scoped_lock lock(io_mutex);
|
||||
std::cout << "received: " << n << std::endl;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private:
|
||||
M mutex;
|
||||
boost::condition cond;
|
||||
unsigned int p, c, full;
|
||||
std::vector<int> buf;
|
||||
};
|
||||
|
||||
template <typename M>
|
||||
void do_test(M* dummy=0)
|
||||
{
|
||||
typedef buffer_t<M> buffer_type;
|
||||
buffer_type::get_buffer();
|
||||
boost::thread thrd1(&buffer_type::do_receiver_thread);
|
||||
boost::thread thrd2(&buffer_type::do_receiver_thread);
|
||||
boost::thread thrd3(&buffer_type::do_sender_thread);
|
||||
thrd1.join();
|
||||
thrd2.join();
|
||||
thrd3.join();
|
||||
}
|
||||
|
||||
void test_buffer()
|
||||
{
|
||||
do_test<boost::mutex>();
|
||||
do_test<boost::recursive_mutex>();
|
||||
}
|
||||
|
||||
int main()
|
||||
{
|
||||
test_buffer();
|
||||
return 0;
|
||||
}
|
||||
47
example/mutex.cpp
Normal file
47
example/mutex.cpp
Normal file
@@ -0,0 +1,47 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Distributed under the Boost Software License, Version 1.0 (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt
|
||||
//
|
||||
|
||||
#include <boost/thread/mutex.hpp>
|
||||
#include <boost/thread/thread.hpp>
|
||||
#include <iostream>
|
||||
|
||||
boost::mutex io_mutex; // The iostreams are not guaranteed to be thread-safe!
|
||||
|
||||
class counter
|
||||
{
|
||||
public:
|
||||
counter() : count(0) { }
|
||||
|
||||
int increment() {
|
||||
boost::mutex::scoped_lock scoped_lock(mutex);
|
||||
return ++count;
|
||||
}
|
||||
|
||||
private:
|
||||
boost::mutex mutex;
|
||||
int count;
|
||||
};
|
||||
|
||||
counter c;
|
||||
|
||||
void change_count()
|
||||
{
|
||||
int i = c.increment();
|
||||
boost::mutex::scoped_lock scoped_lock(io_mutex);
|
||||
std::cout << "count == " << i << std::endl;
|
||||
}
|
||||
|
||||
int main(int, char*[])
|
||||
{
|
||||
const int num_threads = 4;
|
||||
boost::thread_group thrds;
|
||||
for (int i=0; i < num_threads; ++i)
|
||||
thrds.create_thread(&change_count);
|
||||
|
||||
thrds.join_all();
|
||||
|
||||
return 0;
|
||||
}
|
||||
31
example/once.cpp
Normal file
31
example/once.cpp
Normal file
@@ -0,0 +1,31 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Distributed under the Boost Software License, Version 1.0 (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt
|
||||
//
|
||||
|
||||
#include <boost/thread/thread.hpp>
|
||||
#include <boost/thread/once.hpp>
|
||||
#include <cassert>
|
||||
|
||||
int value=0;
|
||||
boost::once_flag once = BOOST_ONCE_INIT;
|
||||
|
||||
void init()
|
||||
{
|
||||
++value;
|
||||
}
|
||||
|
||||
void thread_proc()
|
||||
{
|
||||
boost::call_once(&init, once);
|
||||
}
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
boost::thread_group threads;
|
||||
for (int i=0; i<5; ++i)
|
||||
threads.create_thread(&thread_proc);
|
||||
threads.join_all();
|
||||
assert(value == 1);
|
||||
}
|
||||
49
example/recursive_mutex.cpp
Normal file
49
example/recursive_mutex.cpp
Normal file
@@ -0,0 +1,49 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Distributed under the Boost Software License, Version 1.0 (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt
|
||||
//
|
||||
|
||||
#include <boost/thread/recursive_mutex.hpp>
|
||||
#include <boost/thread/thread.hpp>
|
||||
#include <iostream>
|
||||
|
||||
class counter
|
||||
{
|
||||
public:
|
||||
counter() : count(0) { }
|
||||
|
||||
int add(int val) {
|
||||
boost::recursive_mutex::scoped_lock scoped_lock(mutex);
|
||||
count += val;
|
||||
return count;
|
||||
}
|
||||
int increment() {
|
||||
boost::recursive_mutex::scoped_lock scoped_lock(mutex);
|
||||
return add(1);
|
||||
}
|
||||
|
||||
private:
|
||||
boost::recursive_mutex mutex;
|
||||
int count;
|
||||
};
|
||||
|
||||
counter c;
|
||||
|
||||
void change_count()
|
||||
{
|
||||
std::cout << "count == " << c.increment() << std::endl;
|
||||
}
|
||||
|
||||
int main(int, char*[])
|
||||
{
|
||||
const int num_threads=4;
|
||||
|
||||
boost::thread_group threads;
|
||||
for (int i=0; i < num_threads; ++i)
|
||||
threads.create_thread(&change_count);
|
||||
|
||||
threads.join_all();
|
||||
|
||||
return 0;
|
||||
}
|
||||
185
example/starvephil.cpp
Normal file
185
example/starvephil.cpp
Normal file
@@ -0,0 +1,185 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Distributed under the Boost Software License, Version 1.0 (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt
|
||||
//
|
||||
|
||||
#include <boost/thread/mutex.hpp>
|
||||
#include <boost/thread/condition.hpp>
|
||||
#include <boost/thread/thread.hpp>
|
||||
#include <boost/thread/xtime.hpp>
|
||||
#include <iostream>
|
||||
#include <time.h>
|
||||
|
||||
namespace
|
||||
{
|
||||
boost::mutex iomx;
|
||||
} // namespace
|
||||
|
||||
class canteen
|
||||
{
|
||||
public:
|
||||
canteen() : m_chickens(0) { }
|
||||
|
||||
void get(int id)
|
||||
{
|
||||
boost::mutex::scoped_lock lock(m_mutex);
|
||||
while (m_chickens == 0)
|
||||
{
|
||||
{
|
||||
boost::mutex::scoped_lock lock(iomx);
|
||||
std::cout << "(" << clock() << ") Phil" << id <<
|
||||
": wot, no chickens? I'll WAIT ..." << std::endl;
|
||||
}
|
||||
m_condition.wait(lock);
|
||||
}
|
||||
{
|
||||
boost::mutex::scoped_lock lock(iomx);
|
||||
std::cout << "(" << clock() << ") Phil" << id <<
|
||||
": those chickens look good ... one please ..." << std::endl;
|
||||
}
|
||||
m_chickens--;
|
||||
}
|
||||
void put(int value)
|
||||
{
|
||||
boost::mutex::scoped_lock lock(m_mutex);
|
||||
{
|
||||
boost::mutex::scoped_lock lock(iomx);
|
||||
std::cout << "(" << clock()
|
||||
<< ") Chef: ouch ... make room ... this dish is "
|
||||
<< "very hot ..." << std::endl;
|
||||
}
|
||||
boost::xtime xt;
|
||||
boost::xtime_get(&xt, boost::TIME_UTC);
|
||||
xt.sec += 3;
|
||||
boost::thread::sleep(xt);
|
||||
m_chickens += value;
|
||||
{
|
||||
boost::mutex::scoped_lock lock(iomx);
|
||||
std::cout << "(" << clock() <<
|
||||
") Chef: more chickens ... " << m_chickens <<
|
||||
" now available ... NOTIFYING ..." << std::endl;
|
||||
}
|
||||
m_condition.notify_all();
|
||||
}
|
||||
|
||||
private:
|
||||
boost::mutex m_mutex;
|
||||
boost::condition m_condition;
|
||||
int m_chickens;
|
||||
};
|
||||
|
||||
canteen g_canteen;
|
||||
|
||||
void chef()
|
||||
{
|
||||
const int chickens = 4;
|
||||
{
|
||||
boost::mutex::scoped_lock lock(iomx);
|
||||
std::cout << "(" << clock() << ") Chef: starting ..." << std::endl;
|
||||
}
|
||||
for (;;)
|
||||
{
|
||||
{
|
||||
boost::mutex::scoped_lock lock(iomx);
|
||||
std::cout << "(" << clock() << ") Chef: cooking ..." << std::endl;
|
||||
}
|
||||
boost::xtime xt;
|
||||
boost::xtime_get(&xt, boost::TIME_UTC);
|
||||
xt.sec += 2;
|
||||
boost::thread::sleep(xt);
|
||||
{
|
||||
boost::mutex::scoped_lock lock(iomx);
|
||||
std::cout << "(" << clock() << ") Chef: " << chickens
|
||||
<< " chickens, ready-to-go ..." << std::endl;
|
||||
}
|
||||
g_canteen.put(chickens);
|
||||
}
|
||||
}
|
||||
|
||||
struct phil
|
||||
{
|
||||
phil(int id) : m_id(id) { }
|
||||
void run() {
|
||||
{
|
||||
boost::mutex::scoped_lock lock(iomx);
|
||||
std::cout << "(" << clock() << ") Phil" << m_id
|
||||
<< ": starting ..." << std::endl;
|
||||
}
|
||||
for (;;)
|
||||
{
|
||||
if (m_id > 0)
|
||||
{
|
||||
boost::xtime xt;
|
||||
boost::xtime_get(&xt, boost::TIME_UTC);
|
||||
xt.sec += 3;
|
||||
boost::thread::sleep(xt);
|
||||
}
|
||||
{
|
||||
boost::mutex::scoped_lock lock(iomx);
|
||||
std::cout << "(" << clock() << ") Phil" << m_id
|
||||
<< ": gotta eat ..." << std::endl;
|
||||
}
|
||||
g_canteen.get(m_id);
|
||||
{
|
||||
boost::mutex::scoped_lock lock(iomx);
|
||||
std::cout << "(" << clock() << ") Phil" << m_id
|
||||
<< ": mmm ... that's good ..." << std::endl;
|
||||
}
|
||||
}
|
||||
}
|
||||
static void do_thread(void* param) {
|
||||
static_cast<phil*>(param)->run();
|
||||
}
|
||||
|
||||
int m_id;
|
||||
};
|
||||
|
||||
struct thread_adapt
|
||||
{
|
||||
thread_adapt(void (*func)(void*), void* param)
|
||||
: _func(func), _param(param)
|
||||
{
|
||||
}
|
||||
int operator()() const
|
||||
{
|
||||
_func(_param);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void (*_func)(void*);
|
||||
void* _param;
|
||||
};
|
||||
|
||||
class thread_adapter
|
||||
{
|
||||
public:
|
||||
thread_adapter(void (*func)(void*), void* param)
|
||||
: _func(func), _param(param)
|
||||
{
|
||||
}
|
||||
void operator()() const { _func(_param); }
|
||||
private:
|
||||
void (*_func)(void*);
|
||||
void* _param;
|
||||
};
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
boost::thread thrd_chef(&chef);
|
||||
phil p[] = { phil(0), phil(1), phil(2), phil(3), phil(4) };
|
||||
boost::thread thrd_phil0(thread_adapter(&phil::do_thread, &p[0]));
|
||||
boost::thread thrd_phil1(thread_adapter(&phil::do_thread, &p[1]));
|
||||
boost::thread thrd_phil2(thread_adapter(&phil::do_thread, &p[2]));
|
||||
boost::thread thrd_phil3(thread_adapter(&phil::do_thread, &p[3]));
|
||||
boost::thread thrd_phil4(thread_adapter(&phil::do_thread, &p[4]));
|
||||
|
||||
thrd_chef.join();
|
||||
thrd_phil0.join();
|
||||
thrd_phil1.join();
|
||||
thrd_phil2.join();
|
||||
thrd_phil3.join();
|
||||
thrd_phil4.join();
|
||||
|
||||
return 0;
|
||||
}
|
||||
135
example/tennis.cpp
Normal file
135
example/tennis.cpp
Normal file
@@ -0,0 +1,135 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Distributed under the Boost Software License, Version 1.0 (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt
|
||||
//
|
||||
|
||||
#include <boost/thread/mutex.hpp>
|
||||
#include <boost/thread/condition.hpp>
|
||||
#include <boost/thread/thread.hpp>
|
||||
#include <boost/thread/xtime.hpp>
|
||||
#include <iostream>
|
||||
|
||||
#if defined(BOOST_HAS_WINTHREADS)
|
||||
# include <windows.h>
|
||||
# include <process.h>
|
||||
#endif
|
||||
|
||||
enum game_state
|
||||
{
|
||||
START,
|
||||
PLAYER_A,
|
||||
PLAYER_B,
|
||||
GAME_OVER,
|
||||
ONE_PLAYER_GONE,
|
||||
BOTH_PLAYERS_GONE
|
||||
};
|
||||
|
||||
int state;
|
||||
boost::mutex mutex;
|
||||
boost::condition cond;
|
||||
|
||||
char* player_name(int state)
|
||||
{
|
||||
if (state == PLAYER_A)
|
||||
return "PLAYER-A";
|
||||
if (state == PLAYER_B)
|
||||
return "PLAYER-B";
|
||||
throw "bad player";
|
||||
return 0;
|
||||
}
|
||||
|
||||
void player(void* param)
|
||||
{
|
||||
boost::mutex::scoped_lock lock(mutex);
|
||||
|
||||
int active = (int)param;
|
||||
int other = active == PLAYER_A ? PLAYER_B : PLAYER_A;
|
||||
|
||||
while (state < GAME_OVER)
|
||||
{
|
||||
std::cout << player_name(active) << ": Play." << std::endl;
|
||||
state = other;
|
||||
cond.notify_all();
|
||||
do
|
||||
{
|
||||
cond.wait(lock);
|
||||
if (state == other)
|
||||
{
|
||||
std::cout << "---" << player_name(active)
|
||||
<< ": Spurious wakeup!" << std::endl;
|
||||
}
|
||||
} while (state == other);
|
||||
}
|
||||
|
||||
++state;
|
||||
std::cout << player_name(active) << ": Gone." << std::endl;
|
||||
cond.notify_all();
|
||||
}
|
||||
|
||||
struct thread_adapt
|
||||
{
|
||||
thread_adapt(void (*func)(void*), void* param)
|
||||
: _func(func), _param(param)
|
||||
{
|
||||
}
|
||||
int operator()() const
|
||||
{
|
||||
_func(_param);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void (*_func)(void*);
|
||||
void* _param;
|
||||
};
|
||||
|
||||
class thread_adapter
|
||||
{
|
||||
public:
|
||||
thread_adapter(void (*func)(void*), void* param)
|
||||
: _func(func), _param(param)
|
||||
{
|
||||
}
|
||||
void operator()() const { _func(_param); }
|
||||
private:
|
||||
void (*_func)(void*);
|
||||
void* _param;
|
||||
};
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
state = START;
|
||||
|
||||
boost::thread thrda(thread_adapter(&player, (void*)PLAYER_A));
|
||||
boost::thread thrdb(thread_adapter(&player, (void*)PLAYER_B));
|
||||
|
||||
boost::xtime xt;
|
||||
boost::xtime_get(&xt, boost::TIME_UTC);
|
||||
xt.sec += 1;
|
||||
boost::thread::sleep(xt);
|
||||
{
|
||||
boost::mutex::scoped_lock lock(mutex);
|
||||
std::cout << "---Noise ON..." << std::endl;
|
||||
}
|
||||
|
||||
for (int i = 0; i < 1000000; ++i)
|
||||
cond.notify_all();
|
||||
|
||||
{
|
||||
boost::mutex::scoped_lock lock(mutex);
|
||||
std::cout << "---Noise OFF..." << std::endl;
|
||||
state = GAME_OVER;
|
||||
cond.notify_all();
|
||||
do
|
||||
{
|
||||
cond.wait(lock);
|
||||
} while (state != BOTH_PLAYERS_GONE);
|
||||
}
|
||||
|
||||
std::cout << "GAME OVER" << std::endl;
|
||||
|
||||
thrda.join();
|
||||
thrdb.join();
|
||||
|
||||
return 0;
|
||||
}
|
||||
40
example/thread.cpp
Normal file
40
example/thread.cpp
Normal file
@@ -0,0 +1,40 @@
|
||||
// Copyright (C) 2001-2003
|
||||
// William E. Kempf
|
||||
//
|
||||
// Permission to use, copy, modify, distribute and sell this software
|
||||
// and its documentation for any purpose is hereby granted without fee,
|
||||
// provided that the above copyright notice appear in all copies and
|
||||
// that both that copyright notice and this permission notice appear
|
||||
// in supporting documentation. William E. Kempf makes no representations
|
||||
// about the suitability of this software for any purpose.
|
||||
// It is provided "as is" without express or implied warranty.
|
||||
|
||||
#include <boost/thread/thread.hpp>
|
||||
#include <boost/thread/xtime.hpp>
|
||||
#include <iostream>
|
||||
|
||||
struct thread_alarm
|
||||
{
|
||||
thread_alarm(int secs) : m_secs(secs) { }
|
||||
void operator()()
|
||||
{
|
||||
boost::xtime xt;
|
||||
boost::xtime_get(&xt, boost::TIME_UTC);
|
||||
xt.sec += m_secs;
|
||||
|
||||
boost::thread::sleep(xt);
|
||||
|
||||
std::cout << "alarm sounded..." << std::endl;
|
||||
}
|
||||
|
||||
int m_secs;
|
||||
};
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
int secs = 5;
|
||||
std::cout << "setting alarm for 5 seconds..." << std::endl;
|
||||
thread_alarm alarm(secs);
|
||||
boost::thread thrd(alarm);
|
||||
thrd.join();
|
||||
}
|
||||
26
example/thread_group.cpp
Normal file
26
example/thread_group.cpp
Normal file
@@ -0,0 +1,26 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Distributed under the Boost Software License, Version 1.0 (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt
|
||||
//
|
||||
|
||||
|
||||
#include <boost/thread/thread.hpp>
|
||||
#include <iostream>
|
||||
|
||||
int count = 0;
|
||||
boost::mutex mutex;
|
||||
|
||||
void increment_count()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(mutex);
|
||||
std::cout << "count = " << ++count << std::endl;
|
||||
}
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
boost::thread_group threads;
|
||||
for (int i = 0; i < 10; ++i)
|
||||
threads.create_thread(&increment_count);
|
||||
threads.join_all();
|
||||
}
|
||||
36
example/tss.cpp
Normal file
36
example/tss.cpp
Normal file
@@ -0,0 +1,36 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Distributed under the Boost Software License, Version 1.0 (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt
|
||||
//
|
||||
|
||||
#include <boost/thread/thread.hpp>
|
||||
#include <boost/thread/tss.hpp>
|
||||
#include <cassert>
|
||||
|
||||
boost::thread_specific_ptr<int> value;
|
||||
|
||||
void increment()
|
||||
{
|
||||
int* p = value.get();
|
||||
++*p;
|
||||
}
|
||||
|
||||
void thread_proc()
|
||||
{
|
||||
value.reset(new int(0)); // initialize the thread's storage
|
||||
for (int i=0; i<10; ++i)
|
||||
{
|
||||
increment();
|
||||
int* p = value.get();
|
||||
assert(*p == i+1);
|
||||
}
|
||||
}
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
boost::thread_group threads;
|
||||
for (int i=0; i<5; ++i)
|
||||
threads.create_thread(&thread_proc);
|
||||
threads.join_all();
|
||||
}
|
||||
16
example/xtime.cpp
Normal file
16
example/xtime.cpp
Normal file
@@ -0,0 +1,16 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Distributed under the Boost Software License, Version 1.0 (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt
|
||||
//
|
||||
|
||||
#include <boost/thread/thread.hpp>
|
||||
#include <boost/thread/xtime.hpp>
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
boost::xtime xt;
|
||||
boost::xtime_get(&xt, boost::TIME_UTC);
|
||||
xt.sec += 1;
|
||||
boost::thread::sleep(xt); // Sleep for 1 second
|
||||
}
|
||||
24
include/boost/thread.hpp
Normal file
24
include/boost/thread.hpp
Normal file
@@ -0,0 +1,24 @@
|
||||
// Copyright (C) 2001-2003
|
||||
// William E. Kempf
|
||||
//
|
||||
// Permission to use, copy, modify, distribute and sell this software
|
||||
// and its documentation for any purpose is hereby granted without fee,
|
||||
// provided that the above copyright notice appear in all copies and
|
||||
// that both that copyright notice and this permission notice appear
|
||||
// in supporting documentation. William E. Kempf makes no representations
|
||||
// about the suitability of this software for any purpose.
|
||||
// It is provided "as is" without express or implied warranty.
|
||||
|
||||
#if !defined(BOOST_THREAD_WEK01082003_HPP)
|
||||
#define BOOST_THREAD_WEK01082003_HPP
|
||||
|
||||
#include <boost/thread/thread.hpp>
|
||||
#include <boost/thread/condition.hpp>
|
||||
#include <boost/thread/exceptions.hpp>
|
||||
#include <boost/thread/mutex.hpp>
|
||||
#include <boost/thread/once.hpp>
|
||||
#include <boost/thread/recursive_mutex.hpp>
|
||||
#include <boost/thread/tss.hpp>
|
||||
#include <boost/thread/xtime.hpp>
|
||||
|
||||
#endif
|
||||
64
include/boost/thread/barrier.hpp
Normal file
64
include/boost/thread/barrier.hpp
Normal file
@@ -0,0 +1,64 @@
|
||||
#ifndef BOOST_THREAD_BARRIER_HPP
|
||||
#define BOOST_THREAD_BARRIER_HPP
|
||||
|
||||
// barrier.hpp
|
||||
//
|
||||
// (C) Copyright 2006 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <cstddef>
|
||||
#include <stdexcept>
|
||||
#include <boost/thread/detail/platform.hpp>
|
||||
#include <boost/thread/mutex.hpp>
|
||||
#include <boost/thread/condition.hpp>
|
||||
|
||||
#ifdef BOOST_NO_STDC_NAMESPACE
|
||||
namespace std
|
||||
{
|
||||
using ::size_t;
|
||||
}
|
||||
#endif
|
||||
|
||||
namespace boost
|
||||
{
|
||||
class barrier
|
||||
{
|
||||
boost::mutex m;
|
||||
boost::condition cond;
|
||||
|
||||
const std::size_t max_count;
|
||||
std::size_t current_count;
|
||||
public:
|
||||
barrier(std::size_t count):
|
||||
max_count(count),current_count(0)
|
||||
{
|
||||
if(!max_count)
|
||||
{
|
||||
throw std::invalid_argument("You must specify a non-zero count");
|
||||
}
|
||||
}
|
||||
|
||||
bool wait()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(m);
|
||||
if(++current_count==max_count)
|
||||
{
|
||||
current_count=0;
|
||||
cond.notify_all();
|
||||
return true;
|
||||
}
|
||||
else
|
||||
{
|
||||
cond.wait(lock);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
#endif
|
||||
16
include/boost/thread/condition.hpp
Normal file
16
include/boost/thread/condition.hpp
Normal file
@@ -0,0 +1,16 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06040706_HPP
|
||||
#define BOOST_THREAD_RS06040706_HPP
|
||||
|
||||
#include <boost/thread/detail/platform.hpp>
|
||||
#include BOOST_THREAD_PLATFORM(condition.hpp)
|
||||
|
||||
#endif // BOOST_THREAD_RS06040706_HPP
|
||||
|
||||
72
include/boost/thread/detail/platform.hpp
Normal file
72
include/boost/thread/detail/platform.hpp
Normal file
@@ -0,0 +1,72 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06040501_HPP
|
||||
#define BOOST_THREAD_RS06040501_HPP
|
||||
|
||||
// fetch compiler and platform configuration
|
||||
#include <boost/config.hpp>
|
||||
|
||||
// insist on threading support being available:
|
||||
#include <boost/config/requires_threads.hpp>
|
||||
|
||||
// choose platform
|
||||
#if defined(linux) || defined(__linux) || defined(__linux__)
|
||||
# define BOOST_THREAD_LINUX
|
||||
#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
|
||||
# define BOOST_THREAD_BSD
|
||||
#elif defined(sun) || defined(__sun)
|
||||
# define BOOST_THREAD_SOLARIS
|
||||
#elif defined(__sgi)
|
||||
# define BOOST_THREAD_IRIX
|
||||
#elif defined(__hpux)
|
||||
# define BOOST_THREAD_HPUX
|
||||
#elif defined(__CYGWIN__)
|
||||
# define BOOST_THREAD_CYGWIN
|
||||
#elif defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
|
||||
# define BOOST_THREAD_WIN32
|
||||
#elif defined(__BEOS__)
|
||||
# define BOOST_THREAD_BEOS
|
||||
#elif defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
|
||||
# define BOOST_THREAD_MACOS
|
||||
#elif defined(__IBMCPP__) || defined(_AIX)
|
||||
# define BOOST_THREAD_AIX
|
||||
#elif defined(__amigaos__)
|
||||
# define BOOST_THREAD_AMIGAOS
|
||||
#elif defined(__QNXNTO__)
|
||||
# define BOOST_THREAD_QNXNTO
|
||||
#elif defined(unix) || defined(__unix) || defined(_XOPEN_SOURCE) || defined(_POSIX_SOURCE)
|
||||
# if defined(BOOST_HAS_PTHREADS) && !defined(BOOST_THREAD_POSIX)
|
||||
# define BOOST_THREAD_POSIX
|
||||
# endif
|
||||
#endif
|
||||
|
||||
// For every supported platform add a new entry into the dispatch table below.
|
||||
// BOOST_THREAD_POSIX is tested first, so on platforms where posix and native
|
||||
// threading is available, the user may choose, by defining BOOST_THREAD_POSIX
|
||||
// in her source. If a platform is known to support pthreads and no native
|
||||
// port of boost_thread is available just specify "pthread" in the
|
||||
// dispatcher table. If there is no entry for a platform but pthreads is
|
||||
// available on the platform, pthread is choosen as default. If nothing is
|
||||
// available the preprocessor will fail with a diagnostic message.
|
||||
|
||||
#if defined(BOOST_THREAD_POSIX)
|
||||
# define BOOST_THREAD_PPFX pthread
|
||||
#else
|
||||
# if defined(BOOST_THREAD_WIN32)
|
||||
# define BOOST_THREAD_PPFX win32
|
||||
# elif defined(BOOST_HAS_PTHREADS)
|
||||
# define BOOST_THREAD_PPFX pthread
|
||||
# else
|
||||
# error "Sorry, no boost threads are available for this platform."
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#define BOOST_THREAD_PLATFORM(header) <boost/thread/BOOST_THREAD_PPFX/header>
|
||||
|
||||
#endif // BOOST_THREAD_RS06040501_HPP
|
||||
16
include/boost/thread/exceptions.hpp
Normal file
16
include/boost/thread/exceptions.hpp
Normal file
@@ -0,0 +1,16 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06040710_HPP
|
||||
#define BOOST_THREAD_RS06040710_HPP
|
||||
|
||||
#include <boost/thread/detail/platform.hpp>
|
||||
#include BOOST_THREAD_PLATFORM(exceptions.hpp)
|
||||
|
||||
#endif // BOOST_THREAD_RS06040710_HPP
|
||||
|
||||
16
include/boost/thread/mutex.hpp
Normal file
16
include/boost/thread/mutex.hpp
Normal file
@@ -0,0 +1,16 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06040704_HPP
|
||||
#define BOOST_THREAD_RS06040704_HPP
|
||||
|
||||
#include <boost/thread/detail/platform.hpp>
|
||||
#include BOOST_THREAD_PLATFORM(mutex.hpp)
|
||||
|
||||
#endif // BOOST_THREAD_RS06040704_HPP
|
||||
|
||||
16
include/boost/thread/once.hpp
Normal file
16
include/boost/thread/once.hpp
Normal file
@@ -0,0 +1,16 @@
|
||||
#ifndef BOOST_THREAD_ONCE_HPP
|
||||
#define BOOST_THREAD_ONCE_HPP
|
||||
|
||||
// once.hpp
|
||||
//
|
||||
// (C) Copyright 2006 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <boost/thread/detail/platform.hpp>
|
||||
#include BOOST_THREAD_PLATFORM(once.hpp)
|
||||
|
||||
|
||||
#endif
|
||||
156
include/boost/thread/pthread/condition.hpp
Normal file
156
include/boost/thread/pthread/condition.hpp
Normal file
@@ -0,0 +1,156 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06040707_HPP
|
||||
#define BOOST_THREAD_RS06040707_HPP
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
|
||||
#include <boost/thread/exceptions.hpp>
|
||||
#include <boost/utility.hpp>
|
||||
#include <boost/thread/pthread/lock.hpp>
|
||||
|
||||
#include <pthread.h>
|
||||
|
||||
namespace boost {
|
||||
|
||||
struct xtime;
|
||||
|
||||
// disable warnings about non dll import
|
||||
// see: http://www.boost.org/more/separate_compilation.html#dlls
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(push)
|
||||
# pragma warning(disable: 4251 4231 4660 4275)
|
||||
#endif
|
||||
|
||||
namespace detail {
|
||||
|
||||
class BOOST_THREAD_DECL condition_impl : private noncopyable
|
||||
{
|
||||
friend class condition;
|
||||
|
||||
public:
|
||||
condition_impl();
|
||||
~condition_impl();
|
||||
|
||||
void notify_one();
|
||||
void notify_all();
|
||||
|
||||
void do_wait(pthread_mutex_t* pmutex);
|
||||
bool do_timed_wait(const xtime& xt, pthread_mutex_t* pmutex);
|
||||
|
||||
pthread_cond_t m_condition;
|
||||
};
|
||||
|
||||
} // namespace detail
|
||||
|
||||
class condition : private noncopyable
|
||||
{
|
||||
public:
|
||||
condition() { }
|
||||
~condition() { }
|
||||
|
||||
void notify_one() { m_impl.notify_one(); }
|
||||
void notify_all() { m_impl.notify_all(); }
|
||||
|
||||
template <typename L>
|
||||
void wait(L& lock)
|
||||
{
|
||||
if (!lock)
|
||||
throw lock_error();
|
||||
|
||||
do_wait(lock.m_mutex);
|
||||
}
|
||||
|
||||
template <typename L, typename Pr>
|
||||
void wait(L& lock, Pr pred)
|
||||
{
|
||||
if (!lock)
|
||||
throw lock_error();
|
||||
|
||||
while (!pred())
|
||||
do_wait(lock.m_mutex);
|
||||
}
|
||||
|
||||
template <typename L>
|
||||
bool timed_wait(L& lock, const xtime& xt)
|
||||
{
|
||||
if (!lock)
|
||||
throw lock_error();
|
||||
|
||||
return do_timed_wait(lock.m_mutex, xt);
|
||||
}
|
||||
|
||||
template <typename L, typename Pr>
|
||||
bool timed_wait(L& lock, const xtime& xt, Pr pred)
|
||||
{
|
||||
if (!lock)
|
||||
throw lock_error();
|
||||
|
||||
while (!pred())
|
||||
{
|
||||
if (!do_timed_wait(lock.m_mutex, xt))
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
private:
|
||||
detail::condition_impl m_impl;
|
||||
|
||||
template <typename M>
|
||||
void do_wait(M& mutex)
|
||||
{
|
||||
|
||||
typedef detail::thread::lock_ops<M>
|
||||
#if defined(__HP_aCC) && __HP_aCC <= 33900 && !defined(BOOST_STRICT_CONFIG)
|
||||
# define lock_ops lock_ops_ // HP confuses lock_ops witht the template
|
||||
#endif
|
||||
lock_ops;
|
||||
|
||||
typename lock_ops::lock_state state;
|
||||
lock_ops::unlock(mutex, state);
|
||||
|
||||
m_impl.do_wait(state.pmutex);
|
||||
|
||||
lock_ops::lock(mutex, state);
|
||||
#undef lock_ops
|
||||
}
|
||||
|
||||
template <typename M>
|
||||
bool do_timed_wait(M& mutex, const xtime& xt)
|
||||
{
|
||||
|
||||
typedef detail::thread::lock_ops<M>
|
||||
#if defined(__HP_aCC) && __HP_aCC <= 33900 && !defined(BOOST_STRICT_CONFIG)
|
||||
# define lock_ops lock_ops_ // HP confuses lock_ops witht the template
|
||||
#endif
|
||||
lock_ops;
|
||||
|
||||
typename lock_ops::lock_state state;
|
||||
lock_ops::unlock(mutex, state);
|
||||
|
||||
bool ret = false;
|
||||
|
||||
ret = m_impl.do_timed_wait(xt, state.pmutex);
|
||||
|
||||
lock_ops::lock(mutex, state);
|
||||
#undef lock_ops
|
||||
|
||||
return ret;
|
||||
}
|
||||
};
|
||||
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(pop)
|
||||
#endif
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_CONDITION_RS06040707_HPP
|
||||
77
include/boost/thread/pthread/config.hpp
Normal file
77
include/boost/thread/pthread/config.hpp
Normal file
@@ -0,0 +1,77 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06040702_HPP
|
||||
#define BOOST_THREAD_RS06040702_HPP
|
||||
|
||||
#include <boost/config.hpp>
|
||||
|
||||
// insist on threading support being available:
|
||||
#include <boost/config/requires_threads.hpp>
|
||||
|
||||
#if defined(BOOST_THREAD_BUILD_DLL) //Build dll
|
||||
#elif defined(BOOST_THREAD_BUILD_LIB) //Build lib
|
||||
#elif defined(BOOST_THREAD_USE_DLL) //Use dll
|
||||
#elif defined(BOOST_THREAD_USE_LIB) //Use lib
|
||||
#else //Use default
|
||||
# if defined(BOOST_HAS_WINTHREADS)
|
||||
# if defined(BOOST_MSVC) || defined(BOOST_INTEL_WIN)
|
||||
//For compilers supporting auto-tss cleanup
|
||||
//with Boost.Threads lib, use Boost.Threads lib
|
||||
# define BOOST_THREAD_USE_LIB
|
||||
# else
|
||||
//For compilers not yet supporting auto-tss cleanup
|
||||
//with Boost.Threads lib, use Boost.Threads dll
|
||||
# define BOOST_THREAD_USE_DLL
|
||||
# endif
|
||||
# else
|
||||
# define BOOST_THREAD_USE_LIB
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#if defined(BOOST_HAS_DECLSPEC)
|
||||
# if defined(BOOST_THREAD_BUILD_DLL) //Build dll
|
||||
# define BOOST_THREAD_DECL __declspec(dllexport)
|
||||
# elif defined(BOOST_THREAD_USE_DLL) //Use dll
|
||||
# define BOOST_THREAD_DECL __declspec(dllimport)
|
||||
# else
|
||||
# define BOOST_THREAD_DECL
|
||||
# endif
|
||||
#else
|
||||
# define BOOST_THREAD_DECL
|
||||
#endif // BOOST_HAS_DECLSPEC
|
||||
|
||||
//
|
||||
// Automatically link to the correct build variant where possible.
|
||||
//
|
||||
#if !defined(BOOST_ALL_NO_LIB) && !defined(BOOST_THREAD_NO_LIB) && !defined(BOOST_THREAD_BUILD_DLL) && !defined(BOOST_THREAD_BUILD_LIB)
|
||||
//
|
||||
// Tell the autolink to link dynamically, this will get undef'ed by auto_link.hpp
|
||||
// once it's done with it:
|
||||
//
|
||||
#if defined(BOOST_THREAD_USE_DLL)
|
||||
# define BOOST_DYN_LINK
|
||||
#endif
|
||||
//
|
||||
// Set the name of our library, this will get undef'ed by auto_link.hpp
|
||||
// once it's done with it:
|
||||
//
|
||||
#if defined(BOOST_THREAD_LIB_NAME)
|
||||
# define BOOST_LIB_NAME BOOST_THREAD_LIB_NAME
|
||||
#else
|
||||
# define BOOST_LIB_NAME boost_thread_pthread
|
||||
#endif
|
||||
//
|
||||
// If we're importing code from a dll, then tell auto_link.hpp about it:
|
||||
//
|
||||
// And include the header that does the work:
|
||||
//
|
||||
#include <boost/config/auto_link.hpp>
|
||||
#endif // auto-linking disabled
|
||||
|
||||
#endif // BOOST_THREAD_RS06040702_HPP
|
||||
88
include/boost/thread/pthread/exceptions.hpp
Normal file
88
include/boost/thread/pthread/exceptions.hpp
Normal file
@@ -0,0 +1,88 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06040709_HPP
|
||||
#define BOOST_THREAD_RS06040709_HPP
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
|
||||
#include <string>
|
||||
#include <stdexcept>
|
||||
|
||||
namespace boost {
|
||||
|
||||
class BOOST_THREAD_DECL thread_exception : public std::exception
|
||||
{
|
||||
protected:
|
||||
thread_exception();
|
||||
thread_exception(int sys_err_code);
|
||||
|
||||
public:
|
||||
~thread_exception() throw();
|
||||
|
||||
int native_error() const;
|
||||
|
||||
const char* message() const;
|
||||
|
||||
private:
|
||||
int m_sys_err;
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL lock_error : public thread_exception
|
||||
{
|
||||
public:
|
||||
lock_error();
|
||||
lock_error(int sys_err_code);
|
||||
~lock_error() throw();
|
||||
|
||||
virtual const char* what() const throw();
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL thread_resource_error : public thread_exception
|
||||
{
|
||||
public:
|
||||
thread_resource_error();
|
||||
thread_resource_error(int sys_err_code);
|
||||
~thread_resource_error() throw();
|
||||
|
||||
virtual const char* what() const throw();
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL unsupported_thread_option : public thread_exception
|
||||
{
|
||||
public:
|
||||
unsupported_thread_option();
|
||||
unsupported_thread_option(int sys_err_code);
|
||||
~unsupported_thread_option() throw();
|
||||
|
||||
virtual const char* what() const throw();
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL invalid_thread_argument : public thread_exception
|
||||
{
|
||||
public:
|
||||
invalid_thread_argument();
|
||||
invalid_thread_argument(int sys_err_code);
|
||||
~invalid_thread_argument() throw();
|
||||
|
||||
virtual const char* what() const throw();
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL thread_permission_error : public thread_exception
|
||||
{
|
||||
public:
|
||||
thread_permission_error();
|
||||
thread_permission_error(int sys_err_code);
|
||||
~thread_permission_error() throw();
|
||||
|
||||
virtual const char* what() const throw();
|
||||
};
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_THREAD_RS06040709_HPP
|
||||
205
include/boost/thread/pthread/lock.hpp
Normal file
205
include/boost/thread/pthread/lock.hpp
Normal file
@@ -0,0 +1,205 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06040708_HPP
|
||||
#define BOOST_THREAD_RS06040708_HPP
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
|
||||
#include <boost/utility.hpp>
|
||||
#include <boost/thread/pthread/exceptions.hpp>
|
||||
|
||||
namespace boost {
|
||||
|
||||
class condition;
|
||||
struct xtime;
|
||||
|
||||
namespace detail { namespace thread {
|
||||
|
||||
template <typename Mutex>
|
||||
class lock_ops : private noncopyable
|
||||
{
|
||||
private:
|
||||
lock_ops() { }
|
||||
|
||||
public:
|
||||
typedef typename Mutex::cv_state lock_state;
|
||||
|
||||
static void lock(Mutex& m)
|
||||
{
|
||||
m.do_lock();
|
||||
}
|
||||
static bool trylock(Mutex& m)
|
||||
{
|
||||
return m.do_trylock();
|
||||
}
|
||||
static bool timedlock(Mutex& m, const xtime& xt)
|
||||
{
|
||||
return m.do_timedlock(xt);
|
||||
}
|
||||
static void unlock(Mutex& m)
|
||||
{
|
||||
m.do_unlock();
|
||||
}
|
||||
static void lock(Mutex& m, lock_state& state)
|
||||
{
|
||||
m.do_lock(state);
|
||||
}
|
||||
static void unlock(Mutex& m, lock_state& state)
|
||||
{
|
||||
m.do_unlock(state);
|
||||
}
|
||||
};
|
||||
|
||||
template <typename Mutex>
|
||||
class scoped_lock : private noncopyable
|
||||
{
|
||||
public:
|
||||
typedef Mutex mutex_type;
|
||||
|
||||
explicit scoped_lock(Mutex& mx, bool initially_locked=true)
|
||||
: m_mutex(mx), m_locked(false)
|
||||
{
|
||||
if (initially_locked) lock();
|
||||
}
|
||||
~scoped_lock()
|
||||
{
|
||||
if (m_locked) unlock();
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
if (m_locked) throw lock_error();
|
||||
lock_ops<Mutex>::lock(m_mutex);
|
||||
m_locked = true;
|
||||
}
|
||||
void unlock()
|
||||
{
|
||||
if (!m_locked) throw lock_error();
|
||||
lock_ops<Mutex>::unlock(m_mutex);
|
||||
m_locked = false;
|
||||
}
|
||||
|
||||
bool locked() const { return m_locked; }
|
||||
operator const void*() const { return m_locked ? this : 0; }
|
||||
|
||||
private:
|
||||
friend class boost::condition;
|
||||
|
||||
Mutex& m_mutex;
|
||||
bool m_locked;
|
||||
};
|
||||
|
||||
template <typename TryMutex>
|
||||
class scoped_try_lock : private noncopyable
|
||||
{
|
||||
public:
|
||||
typedef TryMutex mutex_type;
|
||||
|
||||
explicit scoped_try_lock(TryMutex& mx)
|
||||
: m_mutex(mx), m_locked(false)
|
||||
{
|
||||
try_lock();
|
||||
}
|
||||
scoped_try_lock(TryMutex& mx, bool initially_locked)
|
||||
: m_mutex(mx), m_locked(false)
|
||||
{
|
||||
if (initially_locked) lock();
|
||||
}
|
||||
~scoped_try_lock()
|
||||
{
|
||||
if (m_locked) unlock();
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
if (m_locked) throw lock_error();
|
||||
lock_ops<TryMutex>::lock(m_mutex);
|
||||
m_locked = true;
|
||||
}
|
||||
bool try_lock()
|
||||
{
|
||||
if (m_locked) throw lock_error();
|
||||
return (m_locked = lock_ops<TryMutex>::trylock(m_mutex));
|
||||
}
|
||||
void unlock()
|
||||
{
|
||||
if (!m_locked) throw lock_error();
|
||||
lock_ops<TryMutex>::unlock(m_mutex);
|
||||
m_locked = false;
|
||||
}
|
||||
|
||||
bool locked() const { return m_locked; }
|
||||
operator const void*() const { return m_locked ? this : 0; }
|
||||
|
||||
private:
|
||||
friend class boost::condition;
|
||||
|
||||
TryMutex& m_mutex;
|
||||
bool m_locked;
|
||||
};
|
||||
|
||||
template <typename TimedMutex>
|
||||
class scoped_timed_lock : private noncopyable
|
||||
{
|
||||
public:
|
||||
typedef TimedMutex mutex_type;
|
||||
|
||||
scoped_timed_lock(TimedMutex& mx, const xtime& xt)
|
||||
: m_mutex(mx), m_locked(false)
|
||||
{
|
||||
timed_lock(xt);
|
||||
}
|
||||
scoped_timed_lock(TimedMutex& mx, bool initially_locked)
|
||||
: m_mutex(mx), m_locked(false)
|
||||
{
|
||||
if (initially_locked) lock();
|
||||
}
|
||||
~scoped_timed_lock()
|
||||
{
|
||||
if (m_locked) unlock();
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
if (m_locked) throw lock_error();
|
||||
lock_ops<TimedMutex>::lock(m_mutex);
|
||||
m_locked = true;
|
||||
}
|
||||
bool try_lock()
|
||||
{
|
||||
if (m_locked) throw lock_error();
|
||||
return (m_locked = lock_ops<TimedMutex>::trylock(m_mutex));
|
||||
}
|
||||
bool timed_lock(const xtime& xt)
|
||||
{
|
||||
if (m_locked) throw lock_error();
|
||||
return (m_locked = lock_ops<TimedMutex>::timedlock(m_mutex, xt));
|
||||
}
|
||||
void unlock()
|
||||
{
|
||||
if (!m_locked) throw lock_error();
|
||||
lock_ops<TimedMutex>::unlock(m_mutex);
|
||||
m_locked = false;
|
||||
}
|
||||
|
||||
bool locked() const { return m_locked; }
|
||||
operator const void*() const { return m_locked ? this : 0; }
|
||||
|
||||
private:
|
||||
friend class boost::condition;
|
||||
|
||||
TimedMutex& m_mutex;
|
||||
bool m_locked;
|
||||
};
|
||||
|
||||
} // namespace thread
|
||||
} // namespace detail
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_THREAD_RS06040708_HPP
|
||||
116
include/boost/thread/pthread/mutex.hpp
Normal file
116
include/boost/thread/pthread/mutex.hpp
Normal file
@@ -0,0 +1,116 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06040705_HPP
|
||||
#define BOOST_THREAD_RS06040705_HPP
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
|
||||
#include <boost/utility.hpp>
|
||||
#include <boost/thread/pthread/lock.hpp>
|
||||
|
||||
#include <pthread.h>
|
||||
|
||||
namespace boost {
|
||||
|
||||
struct xtime;
|
||||
|
||||
// disable warnings about non dll import
|
||||
// see: http://www.boost.org/more/separate_compilation.html#dlls
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(push)
|
||||
# pragma warning(disable: 4251 4231 4660 4275)
|
||||
#endif
|
||||
|
||||
class BOOST_THREAD_DECL mutex
|
||||
: private noncopyable
|
||||
{
|
||||
public:
|
||||
friend class detail::thread::lock_ops<mutex>;
|
||||
|
||||
typedef detail::thread::scoped_lock<mutex> scoped_lock;
|
||||
|
||||
mutex();
|
||||
~mutex();
|
||||
|
||||
private:
|
||||
struct cv_state
|
||||
{
|
||||
pthread_mutex_t* pmutex;
|
||||
};
|
||||
void do_lock();
|
||||
void do_unlock();
|
||||
void do_lock(cv_state& state);
|
||||
void do_unlock(cv_state& state);
|
||||
|
||||
pthread_mutex_t m_mutex;
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL try_mutex
|
||||
: private noncopyable
|
||||
{
|
||||
public:
|
||||
friend class detail::thread::lock_ops<try_mutex>;
|
||||
|
||||
typedef detail::thread::scoped_lock<try_mutex> scoped_lock;
|
||||
typedef detail::thread::scoped_try_lock<try_mutex> scoped_try_lock;
|
||||
|
||||
try_mutex();
|
||||
~try_mutex();
|
||||
|
||||
private:
|
||||
struct cv_state
|
||||
{
|
||||
pthread_mutex_t* pmutex;
|
||||
};
|
||||
void do_lock();
|
||||
bool do_trylock();
|
||||
void do_unlock();
|
||||
void do_lock(cv_state& state);
|
||||
void do_unlock(cv_state& state);
|
||||
|
||||
pthread_mutex_t m_mutex;
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL timed_mutex
|
||||
: private noncopyable
|
||||
{
|
||||
public:
|
||||
friend class detail::thread::lock_ops<timed_mutex>;
|
||||
|
||||
typedef detail::thread::scoped_lock<timed_mutex> scoped_lock;
|
||||
typedef detail::thread::scoped_try_lock<timed_mutex> scoped_try_lock;
|
||||
typedef detail::thread::scoped_timed_lock<timed_mutex> scoped_timed_lock;
|
||||
|
||||
timed_mutex();
|
||||
~timed_mutex();
|
||||
|
||||
private:
|
||||
struct cv_state
|
||||
{
|
||||
pthread_mutex_t* pmutex;
|
||||
};
|
||||
void do_lock();
|
||||
bool do_trylock();
|
||||
bool do_timedlock(const xtime& xt);
|
||||
void do_unlock();
|
||||
void do_lock(cv_state& state);
|
||||
void do_unlock(cv_state& state);
|
||||
|
||||
pthread_mutex_t m_mutex;
|
||||
pthread_cond_t m_condition;
|
||||
bool m_locked;
|
||||
};
|
||||
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(pop)
|
||||
#endif
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_MUTEX_RS06040705_HPP
|
||||
74
include/boost/thread/pthread/once.hpp
Normal file
74
include/boost/thread/pthread/once.hpp
Normal file
@@ -0,0 +1,74 @@
|
||||
#ifndef BOOST_THREAD_PTHREAD_ONCE_HPP
|
||||
#define BOOST_THREAD_PTHREAD_ONCE_HPP
|
||||
|
||||
// once.hpp
|
||||
//
|
||||
// (C) Copyright 2007 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
|
||||
#include <pthread.h>
|
||||
#include <boost/assert.hpp>
|
||||
|
||||
namespace boost {
|
||||
|
||||
struct once_flag
|
||||
{
|
||||
pthread_mutex_t mutex;
|
||||
unsigned flag;
|
||||
};
|
||||
|
||||
#define BOOST_ONCE_INIT {PTHREAD_MUTEX_INITIALIZER,0}
|
||||
|
||||
namespace detail
|
||||
{
|
||||
struct pthread_mutex_scoped_lock
|
||||
{
|
||||
pthread_mutex_t * mutex;
|
||||
|
||||
explicit pthread_mutex_scoped_lock(pthread_mutex_t* mutex_):
|
||||
mutex(mutex_)
|
||||
{
|
||||
int const res=pthread_mutex_lock(mutex);
|
||||
BOOST_ASSERT(!res);
|
||||
}
|
||||
~pthread_mutex_scoped_lock()
|
||||
{
|
||||
int const res=pthread_mutex_unlock(mutex);
|
||||
BOOST_ASSERT(!res);
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
template<typename Function>
|
||||
void call_once(once_flag& flag,Function f)
|
||||
{
|
||||
long const function_complete_flag_value=0xc15730e2;
|
||||
|
||||
#ifdef BOOST_PTHREAD_HAS_ATOMICS
|
||||
if(::boost::detail::interlocked_read_acquire(&flag.flag)!=function_complete_flag_value)
|
||||
{
|
||||
#endif
|
||||
detail::pthread_mutex_scoped_lock const lock(&flag.mutex);
|
||||
if(flag.flag!=function_complete_flag_value)
|
||||
{
|
||||
f();
|
||||
#ifdef BOOST_PTHREAD_HAS_ATOMICS
|
||||
::boost::detail::interlocked_write_release(&flag.flag,function_complete_flag_value);
|
||||
#else
|
||||
flag.flag=function_complete_flag_value;
|
||||
#endif
|
||||
}
|
||||
#ifdef BOOST_PTHREAD_HAS_ATOMICS
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
||||
#endif
|
||||
389
include/boost/thread/pthread/read_write_mutex.hpp
Normal file
389
include/boost/thread/pthread/read_write_mutex.hpp
Normal file
@@ -0,0 +1,389 @@
|
||||
#ifndef BOOST_THREAD_PTHREAD_READ_WRITE_MUTEX_HPP
|
||||
#define BOOST_THREAD_PTHREAD_READ_WRITE_MUTEX_HPP
|
||||
|
||||
// (C) Copyright 2006-7 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <boost/assert.hpp>
|
||||
#include <boost/static_assert.hpp>
|
||||
#include <boost/thread/mutex.hpp>
|
||||
#include <boost/thread/condition.hpp>
|
||||
#include <boost/thread/xtime.hpp>
|
||||
|
||||
namespace boost
|
||||
{
|
||||
class read_write_mutex
|
||||
{
|
||||
private:
|
||||
struct state_data
|
||||
{
|
||||
unsigned shared_count:10;
|
||||
unsigned exclusive:1;
|
||||
unsigned upgradeable:1;
|
||||
unsigned exclusive_waiting_blocked:1;
|
||||
};
|
||||
|
||||
|
||||
|
||||
state_data state;
|
||||
boost::mutex state_change;
|
||||
boost::condition shared_cond;
|
||||
boost::condition exclusive_cond;
|
||||
boost::condition upgradeable_cond;
|
||||
|
||||
void release_waiters()
|
||||
{
|
||||
exclusive_cond.notify_one();
|
||||
shared_cond.notify_all();
|
||||
}
|
||||
|
||||
|
||||
public:
|
||||
read_write_mutex()
|
||||
{
|
||||
state_data state_={0};
|
||||
state=state_;
|
||||
}
|
||||
|
||||
~read_write_mutex()
|
||||
{
|
||||
}
|
||||
|
||||
void lock_shareable()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
|
||||
while(true)
|
||||
{
|
||||
if(!state.exclusive && !state.exclusive_waiting_blocked)
|
||||
{
|
||||
++state.shared_count;
|
||||
return;
|
||||
}
|
||||
|
||||
shared_cond.wait(lock);
|
||||
}
|
||||
}
|
||||
|
||||
bool try_lock_shareable()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
|
||||
if(state.exclusive || state.exclusive_waiting_blocked)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
else
|
||||
{
|
||||
++state.shared_count;
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
bool timed_lock_shareable(xtime const& timeout)
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
|
||||
while(true)
|
||||
{
|
||||
if(!state.exclusive && !state.exclusive_waiting_blocked)
|
||||
{
|
||||
++state.shared_count;
|
||||
return true;
|
||||
}
|
||||
|
||||
if(!shared_cond.timed_wait(lock,timeout))
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void unlock_shareable()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
bool const last_reader=!--state.shared_count;
|
||||
|
||||
if(last_reader)
|
||||
{
|
||||
if(state.upgradeable)
|
||||
{
|
||||
state.upgradeable=false;
|
||||
state.exclusive=true;
|
||||
upgradeable_cond.notify_one();
|
||||
}
|
||||
else
|
||||
{
|
||||
state.exclusive_waiting_blocked=false;
|
||||
}
|
||||
release_waiters();
|
||||
}
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
|
||||
while(true)
|
||||
{
|
||||
if(state.shared_count || state.exclusive)
|
||||
{
|
||||
state.exclusive_waiting_blocked=true;
|
||||
}
|
||||
else
|
||||
{
|
||||
state.exclusive=true;
|
||||
return;
|
||||
}
|
||||
exclusive_cond.wait(lock);
|
||||
}
|
||||
}
|
||||
|
||||
bool timed_lock(xtime const& timeout)
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
|
||||
while(true)
|
||||
{
|
||||
if(state.shared_count || state.exclusive)
|
||||
{
|
||||
state.exclusive_waiting_blocked=true;
|
||||
}
|
||||
else
|
||||
{
|
||||
state.exclusive=true;
|
||||
return true;
|
||||
}
|
||||
if(!exclusive_cond.timed_wait(lock,timeout))
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
bool try_lock()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
|
||||
if(state.shared_count || state.exclusive)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
else
|
||||
{
|
||||
state.exclusive=true;
|
||||
return true;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void unlock()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
state.exclusive=false;
|
||||
state.exclusive_waiting_blocked=false;
|
||||
release_waiters();
|
||||
}
|
||||
|
||||
void lock_upgradeable()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
while(true)
|
||||
{
|
||||
if(!state.exclusive && !state.exclusive_waiting_blocked && !state.upgradeable)
|
||||
{
|
||||
++state.shared_count;
|
||||
state.upgradeable=true;
|
||||
return;
|
||||
}
|
||||
|
||||
shared_cond.wait(lock);
|
||||
}
|
||||
}
|
||||
|
||||
bool timed_lock_upgradeable(xtime const& timeout)
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
while(true)
|
||||
{
|
||||
if(!state.exclusive && !state.exclusive_waiting_blocked && !state.upgradeable)
|
||||
{
|
||||
++state.shared_count;
|
||||
state.upgradeable=true;
|
||||
return true;
|
||||
}
|
||||
|
||||
if(!shared_cond.timed_wait(lock,timeout))
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
bool try_lock_upgradeable()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
if(state.exclusive || state.exclusive_waiting_blocked || state.upgradeable)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
else
|
||||
{
|
||||
++state.shared_count;
|
||||
state.upgradeable=true;
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
void unlock_upgradeable()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
state.upgradeable=false;
|
||||
bool const last_reader=!--state.shared_count;
|
||||
|
||||
if(last_reader)
|
||||
{
|
||||
state.exclusive_waiting_blocked=false;
|
||||
release_waiters();
|
||||
}
|
||||
}
|
||||
|
||||
void unlock_upgradeable_and_lock()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
--state.shared_count;
|
||||
while(true)
|
||||
{
|
||||
if(!state.shared_count)
|
||||
{
|
||||
state.upgradeable=false;
|
||||
state.exclusive=true;
|
||||
break;
|
||||
}
|
||||
upgradeable_cond.wait(lock);
|
||||
}
|
||||
}
|
||||
|
||||
void unlock_and_lock_upgradeable()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
state.exclusive=false;
|
||||
state.upgradeable=true;
|
||||
++state.shared_count;
|
||||
state.exclusive_waiting_blocked=false;
|
||||
release_waiters();
|
||||
}
|
||||
|
||||
void unlock_and_lock_shareable()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
state.exclusive=false;
|
||||
++state.shared_count;
|
||||
state.exclusive_waiting_blocked=false;
|
||||
release_waiters();
|
||||
}
|
||||
|
||||
void unlock_upgradeable_and_lock_shareable()
|
||||
{
|
||||
boost::mutex::scoped_lock lock(state_change);
|
||||
state.upgradeable=false;
|
||||
state.exclusive_waiting_blocked=false;
|
||||
release_waiters();
|
||||
}
|
||||
|
||||
class scoped_read_lock
|
||||
{
|
||||
read_write_mutex& m;
|
||||
public:
|
||||
scoped_read_lock(read_write_mutex& m_):
|
||||
m(m_)
|
||||
{
|
||||
m.lock_shareable();
|
||||
}
|
||||
~scoped_read_lock()
|
||||
{
|
||||
m.unlock_shareable();
|
||||
}
|
||||
};
|
||||
|
||||
class scoped_write_lock
|
||||
{
|
||||
read_write_mutex& m;
|
||||
bool locked;
|
||||
|
||||
public:
|
||||
scoped_write_lock(read_write_mutex& m_):
|
||||
m(m_),locked(false)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
void lock()
|
||||
{
|
||||
m.lock();
|
||||
locked=true;
|
||||
}
|
||||
|
||||
void unlock()
|
||||
{
|
||||
m.unlock();
|
||||
locked=false;
|
||||
}
|
||||
~scoped_write_lock()
|
||||
{
|
||||
if(locked)
|
||||
{
|
||||
unlock();
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
class scoped_upgradeable_lock
|
||||
{
|
||||
read_write_mutex& m;
|
||||
bool locked;
|
||||
bool upgraded;
|
||||
|
||||
public:
|
||||
scoped_upgradeable_lock(read_write_mutex& m_):
|
||||
m(m_),
|
||||
locked(false),upgraded(false)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
void lock()
|
||||
{
|
||||
m.lock_upgradeable();
|
||||
locked=true;
|
||||
}
|
||||
void upgrade()
|
||||
{
|
||||
m.unlock_upgradeable_and_lock();
|
||||
upgraded=true;
|
||||
}
|
||||
void unlock()
|
||||
{
|
||||
if(upgraded)
|
||||
{
|
||||
m.unlock();
|
||||
}
|
||||
else
|
||||
{
|
||||
m.unlock_upgradeable();
|
||||
}
|
||||
}
|
||||
~scoped_upgradeable_lock()
|
||||
{
|
||||
if(locked)
|
||||
{
|
||||
unlock();
|
||||
}
|
||||
}
|
||||
};
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
#endif
|
||||
136
include/boost/thread/pthread/recursive_mutex.hpp
Normal file
136
include/boost/thread/pthread/recursive_mutex.hpp
Normal file
@@ -0,0 +1,136 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Copyright (C) 2006 Roland Schwarz
|
||||
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_RECURSIVE_MUTEX_RS06092302_HPP
|
||||
#define BOOST_RECURSIVE_MUTEX_RS06092302_HPP
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
|
||||
#include <boost/utility.hpp>
|
||||
#include <boost/thread/pthread/lock.hpp>
|
||||
|
||||
#include <pthread.h>
|
||||
|
||||
namespace boost {
|
||||
|
||||
struct xtime;
|
||||
|
||||
// disable warnings about non dll import
|
||||
// see: http://www.boost.org/more/separate_compilation.html#dlls
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(push)
|
||||
# pragma warning(disable: 4251 4231 4660 4275)
|
||||
#endif
|
||||
|
||||
class BOOST_THREAD_DECL recursive_mutex
|
||||
: private noncopyable
|
||||
{
|
||||
public:
|
||||
friend class detail::thread::lock_ops<recursive_mutex>;
|
||||
|
||||
typedef detail::thread::scoped_lock<recursive_mutex> scoped_lock;
|
||||
|
||||
recursive_mutex();
|
||||
~recursive_mutex();
|
||||
|
||||
private:
|
||||
struct cv_state
|
||||
{
|
||||
long count;
|
||||
pthread_mutex_t* pmutex;
|
||||
};
|
||||
void do_lock();
|
||||
void do_unlock();
|
||||
void do_lock(cv_state& state);
|
||||
void do_unlock(cv_state& state);
|
||||
|
||||
pthread_mutex_t m_mutex;
|
||||
unsigned m_count;
|
||||
#if !defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
pthread_cond_t m_unlocked;
|
||||
pthread_t m_thread_id;
|
||||
bool m_valid_id;
|
||||
#endif
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL recursive_try_mutex
|
||||
: private noncopyable
|
||||
{
|
||||
public:
|
||||
friend class detail::thread::lock_ops<recursive_try_mutex>;
|
||||
|
||||
typedef detail::thread::scoped_lock<recursive_try_mutex> scoped_lock;
|
||||
typedef detail::thread::scoped_try_lock<
|
||||
recursive_try_mutex> scoped_try_lock;
|
||||
|
||||
recursive_try_mutex();
|
||||
~recursive_try_mutex();
|
||||
|
||||
private:
|
||||
struct cv_state
|
||||
{
|
||||
long count;
|
||||
pthread_mutex_t* pmutex;
|
||||
};
|
||||
void do_lock();
|
||||
bool do_trylock();
|
||||
void do_unlock();
|
||||
void do_lock(cv_state& state);
|
||||
void do_unlock(cv_state& state);
|
||||
|
||||
pthread_mutex_t m_mutex;
|
||||
unsigned m_count;
|
||||
#if !defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
pthread_cond_t m_unlocked;
|
||||
pthread_t m_thread_id;
|
||||
bool m_valid_id;
|
||||
#endif
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL recursive_timed_mutex
|
||||
: private noncopyable
|
||||
{
|
||||
public:
|
||||
friend class detail::thread::lock_ops<recursive_timed_mutex>;
|
||||
|
||||
typedef detail::thread::scoped_lock<recursive_timed_mutex> scoped_lock;
|
||||
typedef detail::thread::scoped_try_lock<
|
||||
recursive_timed_mutex> scoped_try_lock;
|
||||
typedef detail::thread::scoped_timed_lock<
|
||||
recursive_timed_mutex> scoped_timed_lock;
|
||||
|
||||
recursive_timed_mutex();
|
||||
~recursive_timed_mutex();
|
||||
|
||||
private:
|
||||
struct cv_state
|
||||
{
|
||||
long count;
|
||||
pthread_mutex_t* pmutex;
|
||||
};
|
||||
void do_lock();
|
||||
bool do_trylock();
|
||||
bool do_timedlock(const xtime& xt);
|
||||
void do_unlock();
|
||||
void do_lock(cv_state& state);
|
||||
void do_unlock(cv_state& state);
|
||||
|
||||
pthread_mutex_t m_mutex;
|
||||
pthread_cond_t m_unlocked;
|
||||
pthread_t m_thread_id;
|
||||
bool m_valid_id;
|
||||
unsigned m_count;
|
||||
};
|
||||
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(pop)
|
||||
#endif
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_RECURSIVE_MUTEX_RS06092302_HPP
|
||||
75
include/boost/thread/pthread/thread.hpp
Normal file
75
include/boost/thread/pthread/thread.hpp
Normal file
@@ -0,0 +1,75 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06040701_HPP
|
||||
#define BOOST_THREAD_RS06040701_HPP
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
|
||||
#include <boost/thread/pthread/mutex.hpp>
|
||||
#include <boost/utility.hpp>
|
||||
#include <boost/function.hpp>
|
||||
#include <list>
|
||||
#include <memory>
|
||||
#include <pthread.h>
|
||||
|
||||
namespace boost {
|
||||
|
||||
struct xtime;
|
||||
|
||||
// disable warnings about non dll import
|
||||
// see: http://www.boost.org/more/separate_compilation.html#dlls
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(push)
|
||||
# pragma warning(disable: 4251 4231 4660 4275)
|
||||
#endif
|
||||
|
||||
class BOOST_THREAD_DECL thread : private noncopyable
|
||||
{
|
||||
public:
|
||||
thread();
|
||||
explicit thread(const function0<void>& threadfunc);
|
||||
~thread();
|
||||
|
||||
bool operator==(const thread& other) const;
|
||||
bool operator!=(const thread& other) const;
|
||||
|
||||
void join();
|
||||
|
||||
static void sleep(const xtime& xt);
|
||||
static void yield();
|
||||
|
||||
private:
|
||||
pthread_t m_thread;
|
||||
bool m_joinable;
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL thread_group : private noncopyable
|
||||
{
|
||||
public:
|
||||
thread_group();
|
||||
~thread_group();
|
||||
|
||||
thread* create_thread(const function0<void>& threadfunc);
|
||||
void add_thread(thread* thrd);
|
||||
void remove_thread(thread* thrd);
|
||||
void join_all();
|
||||
int size();
|
||||
|
||||
private:
|
||||
std::list<thread*> m_threads;
|
||||
mutex m_mutex;
|
||||
};
|
||||
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(pop)
|
||||
#endif
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_THREAD_RS06040701_HPP
|
||||
108
include/boost/thread/pthread/tss.hpp
Normal file
108
include/boost/thread/pthread/tss.hpp
Normal file
@@ -0,0 +1,108 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Copyright (C) 2006 Roland Schwarz
|
||||
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_TSS_RS06092304_HPP
|
||||
#define BOOST_TSS_RS06092304_HPP
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
|
||||
#include <boost/utility.hpp>
|
||||
#include <boost/function.hpp>
|
||||
#include <boost/thread/pthread/exceptions.hpp>
|
||||
|
||||
#include <pthread.h>
|
||||
|
||||
namespace boost {
|
||||
|
||||
// disable warnings about non dll import
|
||||
// see: http://www.boost.org/more/separate_compilation.html#dlls
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(push)
|
||||
# pragma warning(disable: 4251 4231 4660 4275)
|
||||
#endif
|
||||
|
||||
namespace detail {
|
||||
|
||||
class BOOST_THREAD_DECL tss : private noncopyable
|
||||
{
|
||||
public:
|
||||
tss(boost::function1<void, void*>* pcleanup) {
|
||||
if (pcleanup == 0) throw boost::thread_resource_error();
|
||||
try
|
||||
{
|
||||
init(pcleanup);
|
||||
}
|
||||
catch (...)
|
||||
{
|
||||
delete pcleanup;
|
||||
throw boost::thread_resource_error();
|
||||
}
|
||||
}
|
||||
|
||||
void* get() const;
|
||||
void set(void* value);
|
||||
void cleanup(void* p);
|
||||
|
||||
private:
|
||||
unsigned int m_slot; //This is a "pseudo-slot", not a native slot
|
||||
|
||||
void init(boost::function1<void, void*>* pcleanup);
|
||||
};
|
||||
|
||||
template <typename T>
|
||||
struct tss_adapter
|
||||
{
|
||||
template <typename F>
|
||||
tss_adapter(const F& cleanup) : m_cleanup(cleanup) { }
|
||||
void operator()(void* p) { m_cleanup(static_cast<T*>(p)); }
|
||||
boost::function1<void, T*> m_cleanup;
|
||||
};
|
||||
|
||||
} // namespace detail
|
||||
|
||||
template <typename T>
|
||||
class thread_specific_ptr : private noncopyable
|
||||
{
|
||||
public:
|
||||
thread_specific_ptr()
|
||||
: m_tss(new boost::function1<void, void*>(
|
||||
boost::detail::tss_adapter<T>(
|
||||
&thread_specific_ptr<T>::cleanup)))
|
||||
{
|
||||
}
|
||||
thread_specific_ptr(void (*clean)(T*))
|
||||
: m_tss(new boost::function1<void, void*>(
|
||||
boost::detail::tss_adapter<T>(clean)))
|
||||
{
|
||||
}
|
||||
~thread_specific_ptr() { reset(); }
|
||||
|
||||
T* get() const { return static_cast<T*>(m_tss.get()); }
|
||||
T* operator->() const { return get(); }
|
||||
T& operator*() const { return *get(); }
|
||||
T* release() { T* temp = get(); if (temp) m_tss.set(0); return temp; }
|
||||
void reset(T* p=0)
|
||||
{
|
||||
T* cur = get();
|
||||
if (cur == p) return;
|
||||
m_tss.set(p);
|
||||
if (cur) m_tss.cleanup(cur);
|
||||
}
|
||||
|
||||
private:
|
||||
static void cleanup(T* p) { delete p; }
|
||||
detail::tss m_tss;
|
||||
};
|
||||
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(pop)
|
||||
#endif
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif //BOOST_TSS_RS06092304_HPP
|
||||
56
include/boost/thread/pthread/xtime.hpp
Normal file
56
include/boost/thread/pthread/xtime.hpp
Normal file
@@ -0,0 +1,56 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06040711_HPP
|
||||
#define BOOST_THREAD_RS06040711_HPP
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
|
||||
#include <boost/cstdint.hpp>
|
||||
|
||||
namespace boost {
|
||||
|
||||
enum xtime_clock_types
|
||||
{
|
||||
TIME_UTC=1
|
||||
// TIME_TAI,
|
||||
// TIME_MONOTONIC,
|
||||
// TIME_PROCESS,
|
||||
// TIME_THREAD,
|
||||
// TIME_LOCAL,
|
||||
// TIME_SYNC,
|
||||
// TIME_RESOLUTION
|
||||
};
|
||||
|
||||
struct xtime
|
||||
{
|
||||
#if defined(BOOST_NO_INT64_T)
|
||||
typedef int_fast32_t xtime_sec_t; //INT_FAST32_MIN <= sec <= INT_FAST32_MAX
|
||||
#else
|
||||
typedef int_fast64_t xtime_sec_t; //INT_FAST64_MIN <= sec <= INT_FAST64_MAX
|
||||
#endif
|
||||
|
||||
typedef int_fast32_t xtime_nsec_t; //0 <= xtime.nsec < NANOSECONDS_PER_SECOND
|
||||
|
||||
xtime_sec_t sec;
|
||||
xtime_nsec_t nsec;
|
||||
};
|
||||
|
||||
int BOOST_THREAD_DECL xtime_get(struct xtime* xtp, int clock_type);
|
||||
|
||||
inline int xtime_cmp(const xtime& xt1, const xtime& xt2)
|
||||
{
|
||||
if (xt1.sec == xt2.sec)
|
||||
return (int)(xt1.nsec - xt2.nsec);
|
||||
else
|
||||
return (xt1.sec > xt2.sec) ? 1 : -1;
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif //BOOST_THREAD_RS06040711_HPP
|
||||
13
include/boost/thread/read_write_mutex.hpp
Normal file
13
include/boost/thread/read_write_mutex.hpp
Normal file
@@ -0,0 +1,13 @@
|
||||
#ifndef BOOST_THREAD_READ_WRITE_MUTEX_HPP
|
||||
#define BOOST_THREAD_READ_WRITE_MUTEX_HPP
|
||||
|
||||
// (C) Copyright 2006 Anthony Williams
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
|
||||
#include <boost/thread/detail/platform.hpp>
|
||||
#include BOOST_THREAD_PLATFORM(read_write_mutex.hpp)
|
||||
|
||||
#endif
|
||||
16
include/boost/thread/recursive_mutex.hpp
Normal file
16
include/boost/thread/recursive_mutex.hpp
Normal file
@@ -0,0 +1,16 @@
|
||||
#ifndef BOOST_THREAD_RECURSIVE_MUTEX_HPP
|
||||
#define BOOST_THREAD_RECURSIVE_MUTEX_HPP
|
||||
|
||||
// recursive_mutex.hpp
|
||||
//
|
||||
// (C) Copyright 2006 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <boost/thread/detail/platform.hpp>
|
||||
#include BOOST_THREAD_PLATFORM(recursive_mutex.hpp)
|
||||
|
||||
|
||||
#endif
|
||||
16
include/boost/thread/thread.hpp
Normal file
16
include/boost/thread/thread.hpp
Normal file
@@ -0,0 +1,16 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06032802_HPP
|
||||
#define BOOST_THREAD_RS06032802_HPP
|
||||
|
||||
#include <boost/thread/detail/platform.hpp>
|
||||
#include BOOST_THREAD_PLATFORM(thread.hpp)
|
||||
|
||||
#endif // BOOST_THREAD_RS06032802_HPP
|
||||
|
||||
16
include/boost/thread/tss.hpp
Normal file
16
include/boost/thread/tss.hpp
Normal file
@@ -0,0 +1,16 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_TSS_RS06092303_HPP
|
||||
#define BOOST_TSS_RS06092303_HPP
|
||||
|
||||
#include <boost/thread/detail/platform.hpp>
|
||||
#include BOOST_THREAD_PLATFORM(tss.hpp)
|
||||
|
||||
#endif // BOOST_TSS_RS06092301_HPP
|
||||
|
||||
140
include/boost/thread/win32/basic_checked_mutex.hpp
Normal file
140
include/boost/thread/win32/basic_checked_mutex.hpp
Normal file
@@ -0,0 +1,140 @@
|
||||
#ifndef BOOST_BASIC_CHECKED_MUTEX_WIN32_HPP
|
||||
#define BOOST_BASIC_CHECKED_MUTEX_WIN32_HPP
|
||||
|
||||
// basic_checked_mutex_win32.hpp
|
||||
//
|
||||
// (C) Copyright 2006 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <boost/detail/interlocked.hpp>
|
||||
#include <boost/thread/win32/thread_primitives.hpp>
|
||||
#include <boost/thread/win32/interlocked_read.hpp>
|
||||
#include <boost/assert.hpp>
|
||||
|
||||
namespace boost
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
struct basic_checked_mutex
|
||||
{
|
||||
long locking_thread;
|
||||
long active_count;
|
||||
void* semaphore;
|
||||
|
||||
BOOST_STATIC_CONSTANT(long,destroyed_mutex_marker=~0);
|
||||
|
||||
void initialize()
|
||||
{
|
||||
locking_thread=0;
|
||||
active_count=0;
|
||||
semaphore=0;
|
||||
}
|
||||
|
||||
void destroy()
|
||||
{
|
||||
long const old_locking_thread=BOOST_INTERLOCKED_EXCHANGE(&locking_thread,destroyed_mutex_marker);
|
||||
BOOST_ASSERT(!old_locking_thread);
|
||||
void* const old_semaphore=BOOST_INTERLOCKED_EXCHANGE_POINTER(&semaphore,0);
|
||||
if(old_semaphore)
|
||||
{
|
||||
bool const close_handle_succeeded=BOOST_CLOSE_HANDLE(old_semaphore)!=0;
|
||||
BOOST_ASSERT(close_handle_succeeded);
|
||||
}
|
||||
}
|
||||
|
||||
bool try_lock()
|
||||
{
|
||||
check_mutex_lock();
|
||||
bool const success=!BOOST_INTERLOCKED_COMPARE_EXCHANGE(&active_count,1,0);
|
||||
if(success)
|
||||
{
|
||||
set_locking_thread();
|
||||
}
|
||||
|
||||
return success;
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
check_mutex_lock();
|
||||
if(BOOST_INTERLOCKED_INCREMENT(&active_count)!=1)
|
||||
{
|
||||
bool const wait_succeeded=BOOST_WAIT_FOR_SINGLE_OBJECT(get_semaphore(),BOOST_INFINITE)==0;
|
||||
BOOST_ASSERT(wait_succeeded);
|
||||
}
|
||||
set_locking_thread();
|
||||
}
|
||||
|
||||
long get_active_count()
|
||||
{
|
||||
return ::boost::detail::interlocked_read(&active_count);
|
||||
}
|
||||
|
||||
void unlock()
|
||||
{
|
||||
long const current_thread=BOOST_GET_CURRENT_THREAD_ID();
|
||||
long const old_locking_thread=BOOST_INTERLOCKED_COMPARE_EXCHANGE(&locking_thread,0,current_thread);
|
||||
BOOST_ASSERT(old_locking_thread!=destroyed_mutex_marker);
|
||||
BOOST_ASSERT(old_locking_thread==current_thread);
|
||||
|
||||
if(BOOST_INTERLOCKED_DECREMENT(&active_count)!=0)
|
||||
{
|
||||
bool const release_succeeded=BOOST_RELEASE_SEMAPHORE(get_semaphore(),1,0)!=0;
|
||||
BOOST_ASSERT(release_succeeded);
|
||||
}
|
||||
}
|
||||
|
||||
bool locked()
|
||||
{
|
||||
return get_active_count()!=0;
|
||||
}
|
||||
|
||||
private:
|
||||
void check_mutex_lock()
|
||||
{
|
||||
long const current_thread=BOOST_GET_CURRENT_THREAD_ID();
|
||||
long const current_locking_thread=::boost::detail::interlocked_read(&locking_thread);
|
||||
BOOST_ASSERT(current_locking_thread!=current_thread);
|
||||
BOOST_ASSERT(current_locking_thread!=destroyed_mutex_marker);
|
||||
}
|
||||
|
||||
void set_locking_thread()
|
||||
{
|
||||
long const old_owner=BOOST_INTERLOCKED_COMPARE_EXCHANGE(&locking_thread,BOOST_GET_CURRENT_THREAD_ID(),0);
|
||||
BOOST_ASSERT(old_owner==0);
|
||||
}
|
||||
|
||||
void* get_semaphore()
|
||||
{
|
||||
void* current_semaphore=::boost::detail::interlocked_read(&semaphore);
|
||||
|
||||
if(!current_semaphore)
|
||||
{
|
||||
void* const new_semaphore=BOOST_CREATE_SEMAPHORE(0,0,1,0);
|
||||
BOOST_ASSERT(new_semaphore);
|
||||
void* const old_semaphore=BOOST_INTERLOCKED_COMPARE_EXCHANGE_POINTER(&semaphore,new_semaphore,0);
|
||||
if(old_semaphore!=0)
|
||||
{
|
||||
bool const close_succeeded=BOOST_CLOSE_HANDLE(new_semaphore)!=0;
|
||||
BOOST_ASSERT(close_succeeded);
|
||||
return old_semaphore;
|
||||
}
|
||||
else
|
||||
{
|
||||
return new_semaphore;
|
||||
}
|
||||
}
|
||||
return current_semaphore;
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
#define BOOST_BASIC_CHECKED_MUTEX_INITIALIZER {0}
|
||||
|
||||
#endif
|
||||
123
include/boost/thread/win32/basic_recursive_mutex.hpp
Normal file
123
include/boost/thread/win32/basic_recursive_mutex.hpp
Normal file
@@ -0,0 +1,123 @@
|
||||
#ifndef BOOST_BASIC_RECURSIVE_MUTEX_WIN32_HPP
|
||||
#define BOOST_BASIC_RECURSIVE_MUTEX_WIN32_HPP
|
||||
|
||||
// basic_recursive_mutex.hpp
|
||||
//
|
||||
// (C) Copyright 2006 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <boost/detail/interlocked.hpp>
|
||||
#include <boost/thread/win32/thread_primitives.hpp>
|
||||
#include <boost/thread/win32/interlocked_read.hpp>
|
||||
#include <boost/thread/win32/basic_timed_mutex.hpp>
|
||||
#include <boost/thread/xtime.hpp>
|
||||
|
||||
namespace boost
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
template<typename underlying_mutex_type>
|
||||
struct basic_recursive_mutex_impl
|
||||
{
|
||||
long recursion_count;
|
||||
long locking_thread_id;
|
||||
underlying_mutex_type mutex;
|
||||
|
||||
void initialize()
|
||||
{
|
||||
recursion_count=0;
|
||||
locking_thread_id=0;
|
||||
mutex.initialize();
|
||||
}
|
||||
|
||||
void destroy()
|
||||
{
|
||||
mutex.destroy();
|
||||
}
|
||||
|
||||
bool try_lock()
|
||||
{
|
||||
long const current_thread_id=win32::GetCurrentThreadId();
|
||||
return try_recursive_lock(current_thread_id) || try_basic_lock(current_thread_id);
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
long const current_thread_id=win32::GetCurrentThreadId();
|
||||
if(!try_recursive_lock(current_thread_id))
|
||||
{
|
||||
mutex.lock();
|
||||
BOOST_INTERLOCKED_EXCHANGE(&locking_thread_id,current_thread_id);
|
||||
recursion_count=1;
|
||||
}
|
||||
}
|
||||
bool timed_lock(::boost::xtime const& target)
|
||||
{
|
||||
long const current_thread_id=win32::GetCurrentThreadId();
|
||||
return try_recursive_lock(current_thread_id) || try_timed_lock(current_thread_id,target);
|
||||
}
|
||||
long get_active_count()
|
||||
{
|
||||
return mutex.get_active_count();
|
||||
}
|
||||
|
||||
void unlock()
|
||||
{
|
||||
if(!--recursion_count)
|
||||
{
|
||||
BOOST_INTERLOCKED_EXCHANGE(&locking_thread_id,0);
|
||||
mutex.unlock();
|
||||
}
|
||||
}
|
||||
|
||||
bool locked()
|
||||
{
|
||||
return mutex.locked();
|
||||
}
|
||||
|
||||
private:
|
||||
bool try_recursive_lock(long current_thread_id)
|
||||
{
|
||||
if(::boost::detail::interlocked_read(&locking_thread_id)==current_thread_id)
|
||||
{
|
||||
++recursion_count;
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
bool try_basic_lock(long current_thread_id)
|
||||
{
|
||||
if(mutex.try_lock())
|
||||
{
|
||||
BOOST_INTERLOCKED_EXCHANGE(&locking_thread_id,current_thread_id);
|
||||
recursion_count=1;
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
bool try_timed_lock(long current_thread_id,::boost::xtime const& target)
|
||||
{
|
||||
if(mutex.timed_lock(target))
|
||||
{
|
||||
BOOST_INTERLOCKED_EXCHANGE(&locking_thread_id,current_thread_id);
|
||||
recursion_count=1;
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
typedef basic_recursive_mutex_impl<basic_timed_mutex> basic_recursive_mutex;
|
||||
typedef basic_recursive_mutex_impl<basic_timed_mutex> basic_recursive_timed_mutex;
|
||||
}
|
||||
}
|
||||
|
||||
#define BOOST_BASIC_RECURSIVE_MUTEX_INITIALIZER {0}
|
||||
|
||||
#endif
|
||||
158
include/boost/thread/win32/basic_timed_mutex.hpp
Normal file
158
include/boost/thread/win32/basic_timed_mutex.hpp
Normal file
@@ -0,0 +1,158 @@
|
||||
#ifndef BOOST_BASIC_TIMED_MUTEX_WIN32_HPP
|
||||
#define BOOST_BASIC_TIMED_MUTEX_WIN32_HPP
|
||||
|
||||
// basic_timed_mutex_win32.hpp
|
||||
//
|
||||
// (C) Copyright 2006 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <boost/assert.hpp>
|
||||
#include <boost/detail/interlocked.hpp>
|
||||
#include <boost/thread/win32/thread_primitives.hpp>
|
||||
#include <boost/thread/win32/interlocked_read.hpp>
|
||||
#include <boost/thread/win32/xtime.hpp>
|
||||
#include <boost/thread/win32/xtime_utils.hpp>
|
||||
|
||||
namespace boost
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
struct basic_timed_mutex
|
||||
{
|
||||
BOOST_STATIC_CONSTANT(long,lock_flag_value=0x10000);
|
||||
long active_count;
|
||||
void* event;
|
||||
|
||||
void initialize()
|
||||
{
|
||||
active_count=0;
|
||||
event=0;
|
||||
}
|
||||
|
||||
void destroy()
|
||||
{
|
||||
void* const old_event=BOOST_INTERLOCKED_EXCHANGE_POINTER(&event,0);
|
||||
if(old_event)
|
||||
{
|
||||
win32::CloseHandle(old_event);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
bool try_lock()
|
||||
{
|
||||
long old_count=0;
|
||||
while(!(old_count&lock_flag_value))
|
||||
{
|
||||
long const current_count=BOOST_INTERLOCKED_COMPARE_EXCHANGE(&active_count,(old_count+1)|lock_flag_value,old_count);
|
||||
if(current_count==old_count)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
old_count=current_count;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
bool const success=timed_lock(::boost::detail::get_xtime_sentinel());
|
||||
BOOST_ASSERT(success);
|
||||
}
|
||||
bool timed_lock(::boost::xtime const& target_time)
|
||||
{
|
||||
long old_count=0;
|
||||
while(true)
|
||||
{
|
||||
long const current_count=BOOST_INTERLOCKED_COMPARE_EXCHANGE(&active_count,(old_count+1)|lock_flag_value,old_count);
|
||||
if(current_count==old_count)
|
||||
{
|
||||
break;
|
||||
}
|
||||
old_count=current_count;
|
||||
}
|
||||
|
||||
if(old_count&lock_flag_value)
|
||||
{
|
||||
bool lock_acquired=false;
|
||||
void* const sem=get_event();
|
||||
++old_count; // we're waiting, too
|
||||
do
|
||||
{
|
||||
old_count-=(lock_flag_value+1); // there will be one less active thread on this mutex when it gets unlocked
|
||||
if(win32::WaitForSingleObject(sem,::boost::detail::get_milliseconds_until_time(target_time))!=0)
|
||||
{
|
||||
BOOST_INTERLOCKED_DECREMENT(&active_count);
|
||||
return false;
|
||||
}
|
||||
do
|
||||
{
|
||||
long const current_count=BOOST_INTERLOCKED_COMPARE_EXCHANGE(&active_count,old_count|lock_flag_value,old_count);
|
||||
if(current_count==old_count)
|
||||
{
|
||||
break;
|
||||
}
|
||||
old_count=current_count;
|
||||
}
|
||||
while(!(old_count&lock_flag_value));
|
||||
lock_acquired=!(old_count&lock_flag_value);
|
||||
}
|
||||
while(!lock_acquired);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
long get_active_count()
|
||||
{
|
||||
return ::boost::detail::interlocked_read(&active_count);
|
||||
}
|
||||
|
||||
void unlock()
|
||||
{
|
||||
long const offset=lock_flag_value+1;
|
||||
long old_count=BOOST_INTERLOCKED_EXCHANGE_ADD(&active_count,-offset);
|
||||
|
||||
if(old_count>offset)
|
||||
{
|
||||
win32::SetEvent(get_event());
|
||||
}
|
||||
}
|
||||
|
||||
bool locked()
|
||||
{
|
||||
return get_active_count()>=lock_flag_value;
|
||||
}
|
||||
|
||||
private:
|
||||
void* get_event()
|
||||
{
|
||||
void* current_event=::boost::detail::interlocked_read(&event);
|
||||
|
||||
if(!current_event)
|
||||
{
|
||||
void* const new_event=win32::create_anonymous_event(win32::auto_reset_event,win32::event_initially_reset);
|
||||
void* const old_event=BOOST_INTERLOCKED_COMPARE_EXCHANGE_POINTER(&event,new_event,0);
|
||||
if(old_event!=0)
|
||||
{
|
||||
win32::CloseHandle(new_event);
|
||||
return old_event;
|
||||
}
|
||||
else
|
||||
{
|
||||
return new_event;
|
||||
}
|
||||
}
|
||||
return current_event;
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
#define BOOST_BASIC_TIMED_MUTEX_INITIALIZER {0}
|
||||
|
||||
#endif
|
||||
229
include/boost/thread/win32/condition.hpp
Normal file
229
include/boost/thread/win32/condition.hpp
Normal file
@@ -0,0 +1,229 @@
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
// (C) Copyright 2007 Anthony Williams
|
||||
#ifndef CONDITION_HPP
|
||||
#define CONDITION_HPP
|
||||
#include "boost/config.hpp"
|
||||
#include "boost/thread/mutex.hpp"
|
||||
#include "boost/thread/win32/thread_primitives.hpp"
|
||||
#include "boost/thread/win32/xtime.hpp"
|
||||
#include "boost/thread/win32/xtime_utils.hpp"
|
||||
#include <limits.h>
|
||||
#include "boost/assert.hpp"
|
||||
#include <algorithm>
|
||||
|
||||
namespace boost
|
||||
{
|
||||
template<typename lock_type>
|
||||
class basic_condition
|
||||
{
|
||||
boost::mutex internal_mutex;
|
||||
|
||||
struct list_entry
|
||||
{
|
||||
detail::win32::handle semaphore;
|
||||
long count;
|
||||
bool notified;
|
||||
};
|
||||
|
||||
BOOST_STATIC_CONSTANT(unsigned,generation_count=10);
|
||||
|
||||
list_entry generations[generation_count];
|
||||
detail::win32::handle wake_sem;
|
||||
|
||||
static bool no_waiters(list_entry const& entry)
|
||||
{
|
||||
return entry.count==0;
|
||||
}
|
||||
|
||||
void shift_generations_down()
|
||||
{
|
||||
if(std::remove_if(generations,generations+generation_count,no_waiters)==generations+generation_count)
|
||||
{
|
||||
broadcast_entry(generations[generation_count-1],false);
|
||||
}
|
||||
std::copy_backward(generations,generations+generation_count,generations+generation_count);
|
||||
generations[0].semaphore=0;
|
||||
generations[0].count=0;
|
||||
generations[0].notified=false;
|
||||
}
|
||||
|
||||
void broadcast_entry(list_entry& entry,bool wake)
|
||||
{
|
||||
if(wake)
|
||||
{
|
||||
detail::win32::ReleaseSemaphore(wake_sem,entry.count,NULL);
|
||||
}
|
||||
detail::win32::ReleaseSemaphore(entry.semaphore,entry.count,NULL);
|
||||
entry.count=0;
|
||||
dispose_entry(entry);
|
||||
}
|
||||
|
||||
|
||||
void dispose_entry(list_entry& entry)
|
||||
{
|
||||
BOOST_ASSERT(entry.count==0);
|
||||
if(entry.semaphore)
|
||||
{
|
||||
unsigned long const close_result=detail::win32::CloseHandle(entry.semaphore);
|
||||
BOOST_ASSERT(close_result);
|
||||
}
|
||||
entry.semaphore=0;
|
||||
entry.notified=false;
|
||||
}
|
||||
|
||||
detail::win32::handle duplicate_handle(detail::win32::handle source)
|
||||
{
|
||||
detail::win32::handle const current_process=detail::win32::GetCurrentProcess();
|
||||
|
||||
long const same_access_flag=2;
|
||||
detail::win32::handle new_handle=0;
|
||||
bool const success=detail::win32::DuplicateHandle(current_process,source,current_process,&new_handle,0,false,same_access_flag)!=0;
|
||||
BOOST_ASSERT(success);
|
||||
return new_handle;
|
||||
}
|
||||
|
||||
bool do_wait(lock_type& lock,::boost::xtime const& target_time)
|
||||
{
|
||||
detail::win32::handle local_wake_sem;
|
||||
detail::win32::handle sem;
|
||||
bool first_loop=true;
|
||||
bool woken=false;
|
||||
while(!woken)
|
||||
{
|
||||
{
|
||||
boost::mutex::scoped_lock internal_lock(internal_mutex);
|
||||
if(first_loop)
|
||||
{
|
||||
lock.unlock();
|
||||
if(!wake_sem)
|
||||
{
|
||||
wake_sem=detail::win32::create_anonymous_semaphore(0,LONG_MAX);
|
||||
BOOST_ASSERT(wake_sem);
|
||||
}
|
||||
local_wake_sem=duplicate_handle(wake_sem);
|
||||
|
||||
if(generations[0].notified)
|
||||
{
|
||||
shift_generations_down();
|
||||
}
|
||||
if(!generations[0].semaphore)
|
||||
{
|
||||
generations[0].semaphore=detail::win32::create_anonymous_semaphore(0,LONG_MAX);
|
||||
BOOST_ASSERT(generations[0].semaphore);
|
||||
}
|
||||
first_loop=false;
|
||||
}
|
||||
++generations[0].count;
|
||||
sem=duplicate_handle(generations[0].semaphore);
|
||||
}
|
||||
unsigned long const notified=detail::win32::WaitForSingleObject(sem,::boost::detail::get_milliseconds_until_time(target_time));
|
||||
BOOST_ASSERT(notified==detail::win32::timeout || notified==0);
|
||||
|
||||
unsigned long const sem_close_result=detail::win32::CloseHandle(sem);
|
||||
BOOST_ASSERT(sem_close_result);
|
||||
|
||||
if(notified==detail::win32::timeout)
|
||||
{
|
||||
break;
|
||||
}
|
||||
|
||||
unsigned long const woken_result=detail::win32::WaitForSingleObject(local_wake_sem,0);
|
||||
BOOST_ASSERT(woken_result==detail::win32::timeout || woken_result==0);
|
||||
|
||||
woken=(woken_result==0);
|
||||
}
|
||||
unsigned long const wake_sem_close_result=detail::win32::CloseHandle(local_wake_sem);
|
||||
BOOST_ASSERT(wake_sem_close_result);
|
||||
lock.lock();
|
||||
return woken;
|
||||
}
|
||||
|
||||
public:
|
||||
basic_condition():
|
||||
wake_sem(0)
|
||||
{
|
||||
for(unsigned i=0;i<generation_count;++i)
|
||||
{
|
||||
generations[i]=list_entry();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
~basic_condition()
|
||||
{
|
||||
for(unsigned i=0;i<generation_count;++i)
|
||||
{
|
||||
dispose_entry(generations[i]);
|
||||
}
|
||||
detail::win32::CloseHandle(wake_sem);
|
||||
}
|
||||
|
||||
void wait(lock_type& m)
|
||||
{
|
||||
do_wait(m,::boost::detail::get_xtime_sentinel());
|
||||
}
|
||||
|
||||
template<typename predicate_type>
|
||||
void wait(lock_type& m,predicate_type pred)
|
||||
{
|
||||
while(!pred()) wait(m);
|
||||
}
|
||||
|
||||
|
||||
bool timed_wait(lock_type& m,::boost::xtime const& target_time)
|
||||
{
|
||||
return do_wait(m,target_time);
|
||||
}
|
||||
|
||||
template<typename predicate_type>
|
||||
bool timed_wait(lock_type& m,::boost::xtime const& target_time,predicate_type pred)
|
||||
{
|
||||
while (!pred()) { if (!timed_wait(m, target_time)) return false; } return true;
|
||||
}
|
||||
|
||||
void notify_one()
|
||||
{
|
||||
boost::mutex::scoped_lock internal_lock(internal_mutex);
|
||||
if(wake_sem)
|
||||
{
|
||||
detail::win32::ReleaseSemaphore(wake_sem,1,NULL);
|
||||
for(unsigned generation=generation_count;generation!=0;--generation)
|
||||
{
|
||||
list_entry& entry=generations[generation-1];
|
||||
if(entry.count)
|
||||
{
|
||||
entry.notified=true;
|
||||
detail::win32::ReleaseSemaphore(entry.semaphore,1,NULL);
|
||||
if(!--entry.count)
|
||||
{
|
||||
dispose_entry(entry);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void notify_all()
|
||||
{
|
||||
boost::mutex::scoped_lock internal_lock(internal_mutex);
|
||||
if(wake_sem)
|
||||
{
|
||||
for(unsigned generation=generation_count;generation!=0;--generation)
|
||||
{
|
||||
list_entry& entry=generations[generation-1];
|
||||
if(entry.count)
|
||||
{
|
||||
broadcast_entry(entry,true);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
typedef basic_condition<boost::mutex::scoped_lock> condition;
|
||||
}
|
||||
|
||||
#endif
|
||||
77
include/boost/thread/win32/config.hpp
Normal file
77
include/boost/thread/win32/config.hpp
Normal file
@@ -0,0 +1,77 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06041002_HPP
|
||||
#define BOOST_THREAD_RS06041002_HPP
|
||||
|
||||
#include <boost/config.hpp>
|
||||
|
||||
// insist on threading support being available:
|
||||
#include <boost/config/requires_threads.hpp>
|
||||
|
||||
#if defined(BOOST_THREAD_BUILD_DLL) //Build dll
|
||||
#elif defined(BOOST_THREAD_BUILD_LIB) //Build lib
|
||||
#elif defined(BOOST_THREAD_USE_DLL) //Use dll
|
||||
#elif defined(BOOST_THREAD_USE_LIB) //Use lib
|
||||
#else //Use default
|
||||
# if defined(BOOST_HAS_WINTHREADS)
|
||||
# if defined(BOOST_MSVC) || defined(BOOST_INTEL_WIN)
|
||||
//For compilers supporting auto-tss cleanup
|
||||
//with Boost.Threads lib, use Boost.Threads lib
|
||||
# define BOOST_THREAD_USE_LIB
|
||||
# else
|
||||
//For compilers not yet supporting auto-tss cleanup
|
||||
//with Boost.Threads lib, use Boost.Threads dll
|
||||
# define BOOST_THREAD_USE_DLL
|
||||
# endif
|
||||
# else
|
||||
# define BOOST_THREAD_USE_LIB
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#if defined(BOOST_HAS_DECLSPEC)
|
||||
# if defined(BOOST_THREAD_BUILD_DLL) //Build dll
|
||||
# define BOOST_THREAD_DECL __declspec(dllexport)
|
||||
# elif defined(BOOST_THREAD_USE_DLL) //Use dll
|
||||
# define BOOST_THREAD_DECL __declspec(dllimport)
|
||||
# else
|
||||
# define BOOST_THREAD_DECL
|
||||
# endif
|
||||
#else
|
||||
# define BOOST_THREAD_DECL
|
||||
#endif // BOOST_HAS_DECLSPEC
|
||||
|
||||
//
|
||||
// Automatically link to the correct build variant where possible.
|
||||
//
|
||||
#if !defined(BOOST_ALL_NO_LIB) && !defined(BOOST_THREAD_NO_LIB) && !defined(BOOST_THREAD_BUILD_DLL) && !defined(BOOST_THREAD_BUILD_LIB)
|
||||
//
|
||||
// Tell the autolink to link dynamically, this will get undef'ed by auto_link.hpp
|
||||
// once it's done with it:
|
||||
//
|
||||
#if defined(BOOST_THREAD_USE_DLL)
|
||||
# define BOOST_DYN_LINK
|
||||
#endif
|
||||
//
|
||||
// Set the name of our library, this will get undef'ed by auto_link.hpp
|
||||
// once it's done with it:
|
||||
//
|
||||
#if defined(BOOST_THREAD_LIB_NAME)
|
||||
# define BOOST_LIB_NAME BOOST_THREAD_LIB_NAME
|
||||
#else
|
||||
# define BOOST_LIB_NAME boost_thread
|
||||
#endif
|
||||
//
|
||||
// If we're importing code from a dll, then tell auto_link.hpp about it:
|
||||
//
|
||||
// And include the header that does the work:
|
||||
//
|
||||
#include <boost/config/auto_link.hpp>
|
||||
#endif // auto-linking disabled
|
||||
|
||||
#endif // BOOST_THREAD_RS06041002_HPP
|
||||
91
include/boost/thread/win32/exceptions.hpp
Normal file
91
include/boost/thread/win32/exceptions.hpp
Normal file
@@ -0,0 +1,91 @@
|
||||
// (C) Copyright 2005-6 Anthony Williams
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06041003_HPP
|
||||
#define BOOST_THREAD_RS06041003_HPP
|
||||
|
||||
|
||||
#include <boost/thread/win32/config.hpp>
|
||||
|
||||
#include <string>
|
||||
#include <stdexcept>
|
||||
|
||||
namespace boost {
|
||||
|
||||
class BOOST_THREAD_DECL thread_exception : public std::exception
|
||||
{
|
||||
protected:
|
||||
thread_exception();
|
||||
thread_exception(int sys_err_code);
|
||||
|
||||
public:
|
||||
~thread_exception() throw();
|
||||
|
||||
int native_error() const;
|
||||
|
||||
const char* message() const;
|
||||
|
||||
private:
|
||||
int m_sys_err;
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL lock_error : public thread_exception
|
||||
{
|
||||
public:
|
||||
lock_error();
|
||||
lock_error(int sys_err_code);
|
||||
~lock_error() throw();
|
||||
|
||||
virtual const char* what() const throw();
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL thread_resource_error : public thread_exception
|
||||
{
|
||||
public:
|
||||
thread_resource_error();
|
||||
thread_resource_error(int sys_err_code);
|
||||
~thread_resource_error() throw();
|
||||
|
||||
virtual const char* what() const throw();
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL unsupported_thread_option : public thread_exception
|
||||
{
|
||||
public:
|
||||
unsupported_thread_option();
|
||||
unsupported_thread_option(int sys_err_code);
|
||||
~unsupported_thread_option() throw();
|
||||
|
||||
virtual const char* what() const throw();
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL invalid_thread_argument : public thread_exception
|
||||
{
|
||||
public:
|
||||
invalid_thread_argument();
|
||||
invalid_thread_argument(int sys_err_code);
|
||||
~invalid_thread_argument() throw();
|
||||
|
||||
virtual const char* what() const throw();
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL thread_permission_error : public thread_exception
|
||||
{
|
||||
public:
|
||||
thread_permission_error();
|
||||
thread_permission_error(int sys_err_code);
|
||||
~thread_permission_error() throw();
|
||||
|
||||
virtual const char* what() const throw();
|
||||
};
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_THREAD_RS06041003_HPP
|
||||
|
||||
36
include/boost/thread/win32/interlocked_read.hpp
Normal file
36
include/boost/thread/win32/interlocked_read.hpp
Normal file
@@ -0,0 +1,36 @@
|
||||
#ifndef BOOST_THREAD_DETAIL_INTERLOCKED_READ_WIN32_HPP
|
||||
#define BOOST_THREAD_DETAIL_INTERLOCKED_READ_WIN32_HPP
|
||||
|
||||
// interlocked_read_win32.hpp
|
||||
//
|
||||
// (C) Copyright 2005-7 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <boost/detail/interlocked.hpp>
|
||||
|
||||
extern "C" void _ReadWriteBarrier(void);
|
||||
#pragma intrinsic(_ReadWriteBarrier)
|
||||
|
||||
namespace boost
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
inline long interlocked_read_acquire(long volatile* x)
|
||||
{
|
||||
long const res=*x;
|
||||
_ReadWriteBarrier();
|
||||
return res;
|
||||
}
|
||||
inline void* interlocked_read_acquire(void* volatile* x)
|
||||
{
|
||||
void* const res=*x;
|
||||
_ReadWriteBarrier();
|
||||
return res;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
201
include/boost/thread/win32/lock.hpp
Normal file
201
include/boost/thread/win32/lock.hpp
Normal file
@@ -0,0 +1,201 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06041005_HPP
|
||||
#define BOOST_THREAD_RS06041005_HPP
|
||||
|
||||
#include <boost/thread/win32/config.hpp>
|
||||
|
||||
#include <boost/utility.hpp>
|
||||
#include <boost/thread/win32/exceptions.hpp>
|
||||
|
||||
namespace boost {
|
||||
|
||||
struct xtime;
|
||||
|
||||
namespace detail { namespace thread {
|
||||
|
||||
template <typename Mutex>
|
||||
class lock_ops : private noncopyable
|
||||
{
|
||||
private:
|
||||
lock_ops() { }
|
||||
|
||||
public:
|
||||
typedef typename Mutex::cv_state lock_state;
|
||||
|
||||
static void lock(Mutex& m)
|
||||
{
|
||||
m.do_lock();
|
||||
}
|
||||
static bool trylock(Mutex& m)
|
||||
{
|
||||
return m.do_trylock();
|
||||
}
|
||||
static bool timedlock(Mutex& m, const xtime& xt)
|
||||
{
|
||||
return m.do_timedlock(xt);
|
||||
}
|
||||
static void unlock(Mutex& m)
|
||||
{
|
||||
m.do_unlock();
|
||||
}
|
||||
static void lock(Mutex& m, lock_state& state)
|
||||
{
|
||||
m.do_lock(state);
|
||||
}
|
||||
static void unlock(Mutex& m, lock_state& state)
|
||||
{
|
||||
m.do_unlock(state);
|
||||
}
|
||||
};
|
||||
|
||||
template <typename Mutex>
|
||||
class scoped_lock : private noncopyable
|
||||
{
|
||||
public:
|
||||
typedef Mutex mutex_type;
|
||||
|
||||
explicit scoped_lock(Mutex& mx, bool initially_locked=true)
|
||||
: m_mutex(mx), m_locked(false)
|
||||
{
|
||||
if (initially_locked) lock();
|
||||
}
|
||||
~scoped_lock()
|
||||
{
|
||||
if (m_locked) unlock();
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
if (m_locked) throw lock_error();
|
||||
lock_ops<Mutex>::lock(m_mutex);
|
||||
m_locked = true;
|
||||
}
|
||||
void unlock()
|
||||
{
|
||||
if (!m_locked) throw lock_error();
|
||||
lock_ops<Mutex>::unlock(m_mutex);
|
||||
m_locked = false;
|
||||
}
|
||||
|
||||
bool locked() const { return m_locked; }
|
||||
operator const void*() const { return m_locked ? this : 0; }
|
||||
|
||||
private:
|
||||
|
||||
Mutex& m_mutex;
|
||||
bool m_locked;
|
||||
};
|
||||
|
||||
template <typename TryMutex>
|
||||
class scoped_try_lock : private noncopyable
|
||||
{
|
||||
public:
|
||||
typedef TryMutex mutex_type;
|
||||
|
||||
explicit scoped_try_lock(TryMutex& mx)
|
||||
: m_mutex(mx), m_locked(false)
|
||||
{
|
||||
try_lock();
|
||||
}
|
||||
scoped_try_lock(TryMutex& mx, bool initially_locked)
|
||||
: m_mutex(mx), m_locked(false)
|
||||
{
|
||||
if (initially_locked) lock();
|
||||
}
|
||||
~scoped_try_lock()
|
||||
{
|
||||
if (m_locked) unlock();
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
if (m_locked) throw lock_error();
|
||||
lock_ops<TryMutex>::lock(m_mutex);
|
||||
m_locked = true;
|
||||
}
|
||||
bool try_lock()
|
||||
{
|
||||
if (m_locked) throw lock_error();
|
||||
return (m_locked = lock_ops<TryMutex>::trylock(m_mutex));
|
||||
}
|
||||
void unlock()
|
||||
{
|
||||
if (!m_locked) throw lock_error();
|
||||
lock_ops<TryMutex>::unlock(m_mutex);
|
||||
m_locked = false;
|
||||
}
|
||||
|
||||
bool locked() const { return m_locked; }
|
||||
operator const void*() const { return m_locked ? this : 0; }
|
||||
|
||||
private:
|
||||
|
||||
TryMutex& m_mutex;
|
||||
bool m_locked;
|
||||
};
|
||||
|
||||
template <typename TimedMutex>
|
||||
class scoped_timed_lock : private noncopyable
|
||||
{
|
||||
public:
|
||||
typedef TimedMutex mutex_type;
|
||||
|
||||
scoped_timed_lock(TimedMutex& mx, const xtime& xt)
|
||||
: m_mutex(mx), m_locked(false)
|
||||
{
|
||||
timed_lock(xt);
|
||||
}
|
||||
scoped_timed_lock(TimedMutex& mx, bool initially_locked)
|
||||
: m_mutex(mx), m_locked(false)
|
||||
{
|
||||
if (initially_locked) lock();
|
||||
}
|
||||
~scoped_timed_lock()
|
||||
{
|
||||
if (m_locked) unlock();
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
if (m_locked) throw lock_error();
|
||||
lock_ops<TimedMutex>::lock(m_mutex);
|
||||
m_locked = true;
|
||||
}
|
||||
bool try_lock()
|
||||
{
|
||||
if (m_locked) throw lock_error();
|
||||
return (m_locked = lock_ops<TimedMutex>::trylock(m_mutex));
|
||||
}
|
||||
bool timed_lock(const xtime& xt)
|
||||
{
|
||||
if (m_locked) throw lock_error();
|
||||
return (m_locked = lock_ops<TimedMutex>::timedlock(m_mutex, xt));
|
||||
}
|
||||
void unlock()
|
||||
{
|
||||
if (!m_locked) throw lock_error();
|
||||
lock_ops<TimedMutex>::unlock(m_mutex);
|
||||
m_locked = false;
|
||||
}
|
||||
|
||||
bool locked() const { return m_locked; }
|
||||
operator const void*() const { return m_locked ? this : 0; }
|
||||
|
||||
private:
|
||||
|
||||
TimedMutex& m_mutex;
|
||||
bool m_locked;
|
||||
};
|
||||
|
||||
} // namespace thread
|
||||
} // namespace detail
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_THREAD_RS06041005_HPP
|
||||
272
include/boost/thread/win32/mutex.hpp
Normal file
272
include/boost/thread/win32/mutex.hpp
Normal file
@@ -0,0 +1,272 @@
|
||||
// (C) Copyright 2005-6 Anthony Williams
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06041004_HPP
|
||||
#define BOOST_THREAD_RS06041004_HPP
|
||||
|
||||
#include <boost/thread/win32/config.hpp>
|
||||
|
||||
#include <boost/thread/win32/basic_timed_mutex.hpp>
|
||||
#include <boost/utility.hpp>
|
||||
#include <boost/thread/win32/lock.hpp>
|
||||
#include <boost/thread/win32/xtime.hpp>
|
||||
#include <boost/thread/win32/exceptions.hpp>
|
||||
|
||||
namespace boost
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
typedef ::boost::detail::basic_timed_mutex underlying_mutex;
|
||||
}
|
||||
|
||||
class mutex:
|
||||
noncopyable,
|
||||
public ::boost::detail::underlying_mutex
|
||||
{
|
||||
public:
|
||||
mutex()
|
||||
{
|
||||
initialize();
|
||||
}
|
||||
~mutex()
|
||||
{
|
||||
destroy();
|
||||
}
|
||||
|
||||
class scoped_lock
|
||||
{
|
||||
protected:
|
||||
mutex& m;
|
||||
bool is_locked;
|
||||
public:
|
||||
scoped_lock(mutex& m_):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
scoped_lock(mutex& m_,bool do_lock):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
if(do_lock)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
}
|
||||
~scoped_lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
m.unlock();
|
||||
}
|
||||
}
|
||||
void lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
m.lock();
|
||||
is_locked=true;
|
||||
}
|
||||
void unlock()
|
||||
{
|
||||
if(!locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
m.unlock();
|
||||
is_locked=false;
|
||||
}
|
||||
|
||||
operator void* () const
|
||||
{
|
||||
return is_locked?const_cast<void*>(static_cast<void const*>(this)):0;
|
||||
}
|
||||
bool locked() const
|
||||
{
|
||||
return is_locked;
|
||||
}
|
||||
};
|
||||
};
|
||||
|
||||
class try_mutex:
|
||||
noncopyable,
|
||||
protected ::boost::detail::underlying_mutex
|
||||
{
|
||||
public:
|
||||
try_mutex()
|
||||
{
|
||||
initialize();
|
||||
}
|
||||
~try_mutex()
|
||||
{
|
||||
destroy();
|
||||
}
|
||||
|
||||
class scoped_try_lock
|
||||
{
|
||||
protected:
|
||||
try_mutex& m;
|
||||
bool is_locked;
|
||||
public:
|
||||
scoped_try_lock(try_mutex& m_):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
scoped_try_lock(try_mutex& m_,bool do_lock):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
if(do_lock)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
}
|
||||
~scoped_try_lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
m.unlock();
|
||||
}
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
m.lock();
|
||||
is_locked=true;
|
||||
}
|
||||
bool try_lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
is_locked=m.try_lock();
|
||||
return is_locked;
|
||||
}
|
||||
void unlock()
|
||||
{
|
||||
if(!locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
m.unlock();
|
||||
is_locked=false;
|
||||
}
|
||||
|
||||
operator void* () const
|
||||
{
|
||||
return is_locked?const_cast<void*>(static_cast<void const*>(this)):0;
|
||||
}
|
||||
bool locked() const
|
||||
{
|
||||
return is_locked;
|
||||
}
|
||||
};
|
||||
|
||||
typedef scoped_try_lock scoped_lock;
|
||||
};
|
||||
|
||||
class timed_mutex:
|
||||
noncopyable,
|
||||
protected ::boost::detail::basic_timed_mutex
|
||||
{
|
||||
public:
|
||||
timed_mutex()
|
||||
{
|
||||
initialize();
|
||||
}
|
||||
|
||||
~timed_mutex()
|
||||
{
|
||||
destroy();
|
||||
}
|
||||
|
||||
class scoped_timed_lock
|
||||
{
|
||||
protected:
|
||||
timed_mutex& m;
|
||||
bool is_locked;
|
||||
public:
|
||||
scoped_timed_lock(timed_mutex& m_):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
scoped_timed_lock(timed_mutex& m_,::boost::xtime const& target):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
timed_lock(target);
|
||||
}
|
||||
scoped_timed_lock(timed_mutex& m_,bool do_lock):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
if(do_lock)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
}
|
||||
~scoped_timed_lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
m.unlock();
|
||||
}
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
m.lock();
|
||||
is_locked=true;
|
||||
}
|
||||
bool try_lock()
|
||||
{
|
||||
is_locked=m.try_lock();
|
||||
return is_locked;
|
||||
}
|
||||
bool timed_lock(::boost::xtime const& target)
|
||||
{
|
||||
is_locked=m.timed_lock(target);
|
||||
return is_locked;
|
||||
}
|
||||
|
||||
void unlock()
|
||||
{
|
||||
if(!locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
m.unlock();
|
||||
is_locked=false;
|
||||
}
|
||||
|
||||
operator void* () const
|
||||
{
|
||||
return is_locked?const_cast<void*>(static_cast<void const*>(this)):0;
|
||||
}
|
||||
bool locked() const
|
||||
{
|
||||
return is_locked;
|
||||
}
|
||||
};
|
||||
|
||||
typedef scoped_timed_lock scoped_try_lock;
|
||||
typedef scoped_timed_lock scoped_lock;
|
||||
};
|
||||
}
|
||||
|
||||
#endif // BOOST_THREAD_RS06041004_HPP
|
||||
114
include/boost/thread/win32/once.hpp
Normal file
114
include/boost/thread/win32/once.hpp
Normal file
@@ -0,0 +1,114 @@
|
||||
#ifndef BOOST_THREAD_WIN32_ONCE_HPP
|
||||
#define BOOST_THREAD_WIN32_ONCE_HPP
|
||||
|
||||
// once.hpp
|
||||
//
|
||||
// (C) Copyright 2005-7 Anthony Williams
|
||||
// (C) Copyright 2005 John Maddock
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <cstring>
|
||||
#include <cstddef>
|
||||
#include <boost/assert.hpp>
|
||||
#include <boost/static_assert.hpp>
|
||||
#include <boost/detail/interlocked.hpp>
|
||||
#include <boost/thread/win32/thread_primitives.hpp>
|
||||
#include <boost/thread/win32/interlocked_read.hpp>
|
||||
|
||||
#ifdef BOOST_NO_STDC_NAMESPACE
|
||||
namespace std
|
||||
{
|
||||
using ::strlen;
|
||||
using ::memcpy;
|
||||
using ::ptrdiff_t;
|
||||
}
|
||||
#endif
|
||||
|
||||
namespace boost
|
||||
{
|
||||
typedef long once_flag;
|
||||
|
||||
#define BOOST_ONCE_INIT 0
|
||||
|
||||
namespace detail
|
||||
{
|
||||
struct win32_mutex_scoped_lock
|
||||
{
|
||||
void* const mutex_handle;
|
||||
explicit win32_mutex_scoped_lock(void* mutex_handle_):
|
||||
mutex_handle(mutex_handle_)
|
||||
{
|
||||
unsigned long const res=win32::WaitForSingleObject(mutex_handle,win32::infinite);
|
||||
BOOST_ASSERT(!res);
|
||||
}
|
||||
~win32_mutex_scoped_lock()
|
||||
{
|
||||
bool const success=win32::ReleaseMutex(mutex_handle)!=0;
|
||||
BOOST_ASSERT(success);
|
||||
}
|
||||
};
|
||||
|
||||
template <class I>
|
||||
void int_to_string(I p, char* buf)
|
||||
{
|
||||
unsigned i=0;
|
||||
for(; i < sizeof(I)*2; ++i)
|
||||
{
|
||||
buf[i] = 'A' + static_cast<char>((p >> (i*4)) & 0x0f);
|
||||
}
|
||||
buf[i] = 0;
|
||||
}
|
||||
|
||||
unsigned const once_mutex_name_fixed_length=48;
|
||||
unsigned const once_mutex_name_fixed_buffer_size=once_mutex_name_fixed_length+1;
|
||||
unsigned const once_mutex_name_length=once_mutex_name_fixed_buffer_size+sizeof(void*)*2+sizeof(unsigned long)*2;
|
||||
|
||||
// create a named mutex. It doesn't really matter what this name is
|
||||
// as long as it is unique both to this process, and to the address of "flag":
|
||||
inline void* create_once_mutex(char (&mutex_name)[once_mutex_name_length],void* flag_address)
|
||||
{
|
||||
static const char fixed_mutex_name[]="{C15730E2-145C-4c5e-B005-3BC753F42475}-once-flag";
|
||||
BOOST_STATIC_ASSERT(sizeof(fixed_mutex_name) == once_mutex_name_fixed_buffer_size);
|
||||
|
||||
std::memcpy(mutex_name,fixed_mutex_name,sizeof(fixed_mutex_name));
|
||||
BOOST_ASSERT(sizeof(mutex_name) == std::strlen(mutex_name) + sizeof(void*)*2 + sizeof(unsigned long)*2 + 1);
|
||||
|
||||
BOOST_STATIC_ASSERT(sizeof(void*) == sizeof(std::ptrdiff_t));
|
||||
detail::int_to_string(reinterpret_cast<std::ptrdiff_t>(flag_address), mutex_name + once_mutex_name_fixed_length);
|
||||
detail::int_to_string(win32::GetCurrentProcessId(), mutex_name + once_mutex_name_fixed_length + sizeof(void*)*2);
|
||||
BOOST_ASSERT(sizeof(mutex_name) == std::strlen(mutex_name) + 1);
|
||||
|
||||
return win32::CreateMutexA(NULL, 0, mutex_name);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
template<typename Function>
|
||||
void call_once(once_flag& flag,Function f)
|
||||
{
|
||||
// Try for a quick win: if the proceedure has already been called
|
||||
// just skip through:
|
||||
long const function_complete_flag_value=0xc15730e2;
|
||||
|
||||
if(::boost::detail::interlocked_read_acquire(&flag)!=function_complete_flag_value)
|
||||
{
|
||||
char mutex_name[::boost::detail::once_mutex_name_length];
|
||||
void* const mutex_handle(::boost::detail::create_once_mutex(mutex_name,&flag));
|
||||
BOOST_ASSERT(mutex_handle);
|
||||
detail::win32::handle_manager const closer(mutex_handle);
|
||||
detail::win32_mutex_scoped_lock const lock(mutex_handle);
|
||||
|
||||
if(flag!=function_complete_flag_value)
|
||||
{
|
||||
f();
|
||||
BOOST_INTERLOCKED_EXCHANGE(&flag,function_complete_flag_value);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
528
include/boost/thread/win32/read_write_mutex.hpp
Normal file
528
include/boost/thread/win32/read_write_mutex.hpp
Normal file
@@ -0,0 +1,528 @@
|
||||
#ifndef BOOST_THREAD_WIN32_READ_WRITE_MUTEX_HPP
|
||||
#define BOOST_THREAD_WIN32_READ_WRITE_MUTEX_HPP
|
||||
|
||||
// (C) Copyright 2006 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <boost/assert.hpp>
|
||||
#include <boost/detail/interlocked.hpp>
|
||||
#include <boost/thread/win32/thread_primitives.hpp>
|
||||
#include <boost/thread/win32/interlocked_read.hpp>
|
||||
#include <boost/static_assert.hpp>
|
||||
#include <limits.h>
|
||||
|
||||
namespace boost
|
||||
{
|
||||
class read_write_mutex
|
||||
{
|
||||
private:
|
||||
struct state_data
|
||||
{
|
||||
unsigned shared_count:10;
|
||||
unsigned shared_waiting:10;
|
||||
unsigned exclusive:1;
|
||||
unsigned upgradeable:1;
|
||||
unsigned exclusive_waiting:9;
|
||||
unsigned exclusive_waiting_blocked:1;
|
||||
|
||||
friend bool operator==(state_data const& lhs,state_data const& rhs)
|
||||
{
|
||||
return *reinterpret_cast<unsigned const*>(&lhs)==*reinterpret_cast<unsigned const*>(&rhs);
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
template<typename T>
|
||||
T interlocked_compare_exchange(T* target,T new_value,T comparand)
|
||||
{
|
||||
BOOST_STATIC_ASSERT(sizeof(T)==sizeof(long));
|
||||
long const res=BOOST_INTERLOCKED_COMPARE_EXCHANGE(reinterpret_cast<long*>(target),
|
||||
*reinterpret_cast<long*>(&new_value),
|
||||
*reinterpret_cast<long*>(&comparand));
|
||||
return *reinterpret_cast<T const*>(&res);
|
||||
}
|
||||
|
||||
state_data state;
|
||||
void* semaphores[2];
|
||||
void* &unlock_sem;
|
||||
void* &exclusive_sem;
|
||||
void* upgradeable_sem;
|
||||
|
||||
void release_waiters(state_data old_state)
|
||||
{
|
||||
if(old_state.exclusive_waiting)
|
||||
{
|
||||
bool const success=detail::win32::ReleaseSemaphore(exclusive_sem,1,NULL)!=0;
|
||||
BOOST_ASSERT(success);
|
||||
}
|
||||
|
||||
if(old_state.shared_waiting || old_state.exclusive_waiting)
|
||||
{
|
||||
bool const success=detail::win32::ReleaseSemaphore(unlock_sem,old_state.shared_waiting + (old_state.exclusive_waiting?1:0),NULL)!=0;
|
||||
BOOST_ASSERT(success);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
public:
|
||||
read_write_mutex():
|
||||
unlock_sem(semaphores[0]),
|
||||
exclusive_sem(semaphores[1])
|
||||
{
|
||||
unlock_sem=detail::win32::create_anonymous_semaphore(0,LONG_MAX);
|
||||
exclusive_sem=detail::win32::create_anonymous_semaphore(0,LONG_MAX);
|
||||
upgradeable_sem=detail::win32::create_anonymous_semaphore(0,LONG_MAX);
|
||||
state_data state_={0};
|
||||
state=state_;
|
||||
}
|
||||
|
||||
~read_write_mutex()
|
||||
{
|
||||
detail::win32::CloseHandle(upgradeable_sem);
|
||||
detail::win32::CloseHandle(unlock_sem);
|
||||
detail::win32::CloseHandle(exclusive_sem);
|
||||
}
|
||||
|
||||
bool try_lock_shareable()
|
||||
{
|
||||
state_data old_state=state;
|
||||
do
|
||||
{
|
||||
state_data new_state=old_state;
|
||||
if(!new_state.exclusive && !new_state.exclusive_waiting_blocked)
|
||||
{
|
||||
++new_state.shared_count;
|
||||
}
|
||||
|
||||
state_data const current_state=interlocked_compare_exchange(&state,new_state,old_state);
|
||||
if(current_state==old_state)
|
||||
{
|
||||
break;
|
||||
}
|
||||
old_state=current_state;
|
||||
}
|
||||
while(true);
|
||||
return !(old_state.exclusive| old_state.exclusive_waiting_blocked);
|
||||
}
|
||||
|
||||
void lock_shareable()
|
||||
{
|
||||
while(true)
|
||||
{
|
||||
state_data old_state=state;
|
||||
do
|
||||
{
|
||||
state_data new_state=old_state;
|
||||
if(new_state.exclusive || new_state.exclusive_waiting_blocked)
|
||||
{
|
||||
++new_state.shared_waiting;
|
||||
}
|
||||
else
|
||||
{
|
||||
++new_state.shared_count;
|
||||
}
|
||||
|
||||
state_data const current_state=interlocked_compare_exchange(&state,new_state,old_state);
|
||||
if(current_state==old_state)
|
||||
{
|
||||
break;
|
||||
}
|
||||
old_state=current_state;
|
||||
}
|
||||
while(true);
|
||||
|
||||
if(!(old_state.exclusive| old_state.exclusive_waiting_blocked))
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
unsigned long const res=detail::win32::WaitForSingleObject(unlock_sem,detail::win32::infinite);
|
||||
BOOST_ASSERT(res==0);
|
||||
}
|
||||
}
|
||||
|
||||
void unlock_shareable()
|
||||
{
|
||||
state_data old_state=state;
|
||||
do
|
||||
{
|
||||
state_data new_state=old_state;
|
||||
bool const last_reader=!--new_state.shared_count;
|
||||
|
||||
if(last_reader)
|
||||
{
|
||||
if(new_state.upgradeable)
|
||||
{
|
||||
new_state.upgradeable=false;
|
||||
new_state.exclusive=true;
|
||||
}
|
||||
else
|
||||
{
|
||||
if(new_state.exclusive_waiting)
|
||||
{
|
||||
--new_state.exclusive_waiting;
|
||||
new_state.exclusive_waiting_blocked=false;
|
||||
}
|
||||
new_state.shared_waiting=0;
|
||||
}
|
||||
}
|
||||
|
||||
state_data const current_state=interlocked_compare_exchange(&state,new_state,old_state);
|
||||
if(current_state==old_state)
|
||||
{
|
||||
if(last_reader)
|
||||
{
|
||||
if(old_state.upgradeable)
|
||||
{
|
||||
bool const success=detail::win32::ReleaseSemaphore(upgradeable_sem,1,NULL)!=0;
|
||||
BOOST_ASSERT(success);
|
||||
}
|
||||
else
|
||||
{
|
||||
release_waiters(old_state);
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
old_state=current_state;
|
||||
}
|
||||
while(true);
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
while(true)
|
||||
{
|
||||
state_data old_state=state;
|
||||
|
||||
do
|
||||
{
|
||||
state_data new_state=old_state;
|
||||
if(new_state.shared_count || new_state.exclusive)
|
||||
{
|
||||
++new_state.exclusive_waiting;
|
||||
new_state.exclusive_waiting_blocked=true;
|
||||
}
|
||||
else
|
||||
{
|
||||
new_state.exclusive=true;
|
||||
}
|
||||
|
||||
state_data const current_state=interlocked_compare_exchange(&state,new_state,old_state);
|
||||
if(current_state==old_state)
|
||||
{
|
||||
break;
|
||||
}
|
||||
old_state=current_state;
|
||||
}
|
||||
while(true);
|
||||
|
||||
if(!old_state.shared_count && !old_state.exclusive)
|
||||
{
|
||||
break;
|
||||
}
|
||||
bool const success2=detail::win32::WaitForMultipleObjects(2,semaphores,true,detail::win32::infinite)<2;
|
||||
BOOST_ASSERT(success2);
|
||||
}
|
||||
}
|
||||
|
||||
void unlock()
|
||||
{
|
||||
state_data old_state=state;
|
||||
do
|
||||
{
|
||||
state_data new_state=old_state;
|
||||
new_state.exclusive=false;
|
||||
if(new_state.exclusive_waiting)
|
||||
{
|
||||
--new_state.exclusive_waiting;
|
||||
new_state.exclusive_waiting_blocked=false;
|
||||
}
|
||||
new_state.shared_waiting=0;
|
||||
|
||||
state_data const current_state=interlocked_compare_exchange(&state,new_state,old_state);
|
||||
if(current_state==old_state)
|
||||
{
|
||||
break;
|
||||
}
|
||||
old_state=current_state;
|
||||
}
|
||||
while(true);
|
||||
release_waiters(old_state);
|
||||
}
|
||||
|
||||
void lock_upgradeable()
|
||||
{
|
||||
while(true)
|
||||
{
|
||||
state_data old_state=state;
|
||||
do
|
||||
{
|
||||
state_data new_state=old_state;
|
||||
if(new_state.exclusive || new_state.exclusive_waiting_blocked || new_state.upgradeable)
|
||||
{
|
||||
++new_state.shared_waiting;
|
||||
}
|
||||
else
|
||||
{
|
||||
++new_state.shared_count;
|
||||
new_state.upgradeable=true;
|
||||
}
|
||||
|
||||
state_data const current_state=interlocked_compare_exchange(&state,new_state,old_state);
|
||||
if(current_state==old_state)
|
||||
{
|
||||
break;
|
||||
}
|
||||
old_state=current_state;
|
||||
}
|
||||
while(true);
|
||||
|
||||
if(!(old_state.exclusive|| old_state.exclusive_waiting_blocked|| old_state.upgradeable))
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
unsigned long const res=detail::win32::WaitForSingleObject(unlock_sem,detail::win32::infinite);
|
||||
BOOST_ASSERT(res==0);
|
||||
}
|
||||
}
|
||||
|
||||
void unlock_upgradeable()
|
||||
{
|
||||
state_data old_state=state;
|
||||
do
|
||||
{
|
||||
state_data new_state=old_state;
|
||||
new_state.upgradeable=false;
|
||||
bool const last_reader=!--new_state.shared_count;
|
||||
|
||||
if(last_reader)
|
||||
{
|
||||
if(new_state.exclusive_waiting)
|
||||
{
|
||||
--new_state.exclusive_waiting;
|
||||
new_state.exclusive_waiting_blocked=false;
|
||||
}
|
||||
new_state.shared_waiting=0;
|
||||
}
|
||||
|
||||
state_data const current_state=interlocked_compare_exchange(&state,new_state,old_state);
|
||||
if(current_state==old_state)
|
||||
{
|
||||
if(last_reader)
|
||||
{
|
||||
release_waiters(old_state);
|
||||
}
|
||||
break;
|
||||
}
|
||||
old_state=current_state;
|
||||
}
|
||||
while(true);
|
||||
}
|
||||
|
||||
void unlock_upgradeable_and_lock()
|
||||
{
|
||||
state_data old_state=state;
|
||||
do
|
||||
{
|
||||
state_data new_state=old_state;
|
||||
bool const last_reader=!--new_state.shared_count;
|
||||
|
||||
if(last_reader)
|
||||
{
|
||||
new_state.upgradeable=false;
|
||||
new_state.exclusive=true;
|
||||
}
|
||||
|
||||
state_data const current_state=interlocked_compare_exchange(&state,new_state,old_state);
|
||||
if(current_state==old_state)
|
||||
{
|
||||
if(!last_reader)
|
||||
{
|
||||
unsigned long const res=detail::win32::WaitForSingleObject(upgradeable_sem,detail::win32::infinite);
|
||||
BOOST_ASSERT(res==0);
|
||||
}
|
||||
break;
|
||||
}
|
||||
old_state=current_state;
|
||||
}
|
||||
while(true);
|
||||
}
|
||||
|
||||
void unlock_and_lock_upgradeable()
|
||||
{
|
||||
state_data old_state=state;
|
||||
do
|
||||
{
|
||||
state_data new_state=old_state;
|
||||
new_state.exclusive=false;
|
||||
new_state.upgradeable=true;
|
||||
++new_state.shared_count;
|
||||
if(new_state.exclusive_waiting)
|
||||
{
|
||||
--new_state.exclusive_waiting;
|
||||
new_state.exclusive_waiting_blocked=false;
|
||||
}
|
||||
new_state.shared_waiting=0;
|
||||
|
||||
state_data const current_state=interlocked_compare_exchange(&state,new_state,old_state);
|
||||
if(current_state==old_state)
|
||||
{
|
||||
break;
|
||||
}
|
||||
old_state=current_state;
|
||||
}
|
||||
while(true);
|
||||
release_waiters(old_state);
|
||||
}
|
||||
|
||||
void unlock_and_lock_shareable()
|
||||
{
|
||||
state_data old_state=state;
|
||||
do
|
||||
{
|
||||
state_data new_state=old_state;
|
||||
new_state.exclusive=false;
|
||||
++new_state.shared_count;
|
||||
if(new_state.exclusive_waiting)
|
||||
{
|
||||
--new_state.exclusive_waiting;
|
||||
new_state.exclusive_waiting_blocked=false;
|
||||
}
|
||||
new_state.shared_waiting=0;
|
||||
|
||||
state_data const current_state=interlocked_compare_exchange(&state,new_state,old_state);
|
||||
if(current_state==old_state)
|
||||
{
|
||||
break;
|
||||
}
|
||||
old_state=current_state;
|
||||
}
|
||||
while(true);
|
||||
release_waiters(old_state);
|
||||
}
|
||||
|
||||
void unlock_upgradeable_and_lock_shareable()
|
||||
{
|
||||
state_data old_state=state;
|
||||
do
|
||||
{
|
||||
state_data new_state=old_state;
|
||||
new_state.upgradeable=false;
|
||||
if(new_state.exclusive_waiting)
|
||||
{
|
||||
--new_state.exclusive_waiting;
|
||||
new_state.exclusive_waiting_blocked=false;
|
||||
}
|
||||
new_state.shared_waiting=0;
|
||||
|
||||
state_data const current_state=interlocked_compare_exchange(&state,new_state,old_state);
|
||||
if(current_state==old_state)
|
||||
{
|
||||
break;
|
||||
}
|
||||
old_state=current_state;
|
||||
}
|
||||
while(true);
|
||||
release_waiters(old_state);
|
||||
}
|
||||
|
||||
class scoped_read_lock
|
||||
{
|
||||
read_write_mutex& m;
|
||||
public:
|
||||
scoped_read_lock(read_write_mutex& m_):
|
||||
m(m_)
|
||||
{
|
||||
m.lock_shareable();
|
||||
}
|
||||
~scoped_read_lock()
|
||||
{
|
||||
m.unlock_shareable();
|
||||
}
|
||||
};
|
||||
|
||||
class scoped_write_lock
|
||||
{
|
||||
read_write_mutex& m;
|
||||
bool locked;
|
||||
|
||||
public:
|
||||
scoped_write_lock(read_write_mutex& m_):
|
||||
m(m_),locked(false)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
void lock()
|
||||
{
|
||||
m.lock();
|
||||
locked=true;
|
||||
}
|
||||
|
||||
void unlock()
|
||||
{
|
||||
m.unlock();
|
||||
locked=false;
|
||||
}
|
||||
~scoped_write_lock()
|
||||
{
|
||||
if(locked)
|
||||
{
|
||||
unlock();
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
class scoped_upgradeable_lock
|
||||
{
|
||||
read_write_mutex& m;
|
||||
bool locked;
|
||||
bool upgraded;
|
||||
|
||||
public:
|
||||
scoped_upgradeable_lock(read_write_mutex& m_):
|
||||
m(m_),
|
||||
locked(false),upgraded(false)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
void lock()
|
||||
{
|
||||
m.lock_upgradeable();
|
||||
locked=true;
|
||||
}
|
||||
void upgrade()
|
||||
{
|
||||
m.unlock_upgradeable_and_lock();
|
||||
upgraded=true;
|
||||
}
|
||||
void unlock()
|
||||
{
|
||||
if(upgraded)
|
||||
{
|
||||
m.unlock();
|
||||
}
|
||||
else
|
||||
{
|
||||
m.unlock_upgradeable();
|
||||
}
|
||||
}
|
||||
~scoped_upgradeable_lock()
|
||||
{
|
||||
if(locked)
|
||||
{
|
||||
unlock();
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
#endif
|
||||
263
include/boost/thread/win32/recursive_mutex.hpp
Normal file
263
include/boost/thread/win32/recursive_mutex.hpp
Normal file
@@ -0,0 +1,263 @@
|
||||
#ifndef BOOST_RECURSIVE_MUTEX_WIN32_HPP
|
||||
#define BOOST_RECURSIVE_MUTEX_WIN32_HPP
|
||||
|
||||
// recursive_mutex.hpp
|
||||
//
|
||||
// (C) Copyright 2006 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
|
||||
#include <boost/thread/win32/basic_recursive_mutex.hpp>
|
||||
#include <boost/utility.hpp>
|
||||
#include <boost/thread/xtime.hpp>
|
||||
#include <boost/thread/exceptions.hpp>
|
||||
|
||||
namespace boost
|
||||
{
|
||||
class recursive_mutex:
|
||||
noncopyable,
|
||||
protected ::boost::detail::basic_recursive_mutex
|
||||
{
|
||||
public:
|
||||
recursive_mutex()
|
||||
{
|
||||
::boost::detail::basic_recursive_mutex::initialize();
|
||||
}
|
||||
~recursive_mutex()
|
||||
{
|
||||
::boost::detail::basic_recursive_mutex::destroy();
|
||||
}
|
||||
|
||||
class scoped_lock
|
||||
{
|
||||
protected:
|
||||
recursive_mutex& m;
|
||||
bool is_locked;
|
||||
public:
|
||||
scoped_lock(recursive_mutex& m_):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
scoped_lock(recursive_mutex& m_,bool do_lock):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
if(do_lock)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
}
|
||||
~scoped_lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
m.unlock();
|
||||
}
|
||||
}
|
||||
void lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
m.lock();
|
||||
is_locked=true;
|
||||
}
|
||||
void unlock()
|
||||
{
|
||||
if(!locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
m.unlock();
|
||||
is_locked=false;
|
||||
}
|
||||
|
||||
operator void* () const
|
||||
{
|
||||
return is_locked?const_cast<void*>(static_cast<void const*>(this)):0;
|
||||
}
|
||||
bool locked() const
|
||||
{
|
||||
return is_locked;
|
||||
}
|
||||
};
|
||||
};
|
||||
|
||||
class recursive_try_mutex:
|
||||
noncopyable,
|
||||
protected ::boost::detail::basic_recursive_mutex
|
||||
{
|
||||
public:
|
||||
recursive_try_mutex()
|
||||
{
|
||||
::boost::detail::basic_recursive_mutex::initialize();
|
||||
}
|
||||
~recursive_try_mutex()
|
||||
{
|
||||
::boost::detail::basic_recursive_mutex::destroy();
|
||||
}
|
||||
class scoped_try_lock
|
||||
{
|
||||
protected:
|
||||
recursive_try_mutex& m;
|
||||
bool is_locked;
|
||||
public:
|
||||
scoped_try_lock(recursive_try_mutex& m_):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
scoped_try_lock(recursive_try_mutex& m_,bool do_lock):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
if(do_lock)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
}
|
||||
~scoped_try_lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
m.unlock();
|
||||
}
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
m.lock();
|
||||
is_locked=true;
|
||||
}
|
||||
bool try_lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
is_locked=m.try_lock();
|
||||
return is_locked;
|
||||
}
|
||||
void unlock()
|
||||
{
|
||||
if(!locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
m.unlock();
|
||||
is_locked=false;
|
||||
}
|
||||
|
||||
operator void* () const
|
||||
{
|
||||
return is_locked?const_cast<void*>(static_cast<void const*>(this)):0;
|
||||
}
|
||||
bool locked() const
|
||||
{
|
||||
return is_locked;
|
||||
}
|
||||
};
|
||||
|
||||
typedef scoped_try_lock scoped_lock;
|
||||
};
|
||||
|
||||
class recursive_timed_mutex:
|
||||
noncopyable,
|
||||
protected ::boost::detail::basic_recursive_timed_mutex
|
||||
{
|
||||
public:
|
||||
recursive_timed_mutex()
|
||||
{
|
||||
::boost::detail::basic_recursive_timed_mutex::initialize();
|
||||
}
|
||||
~recursive_timed_mutex()
|
||||
{
|
||||
::boost::detail::basic_recursive_timed_mutex::destroy();
|
||||
}
|
||||
|
||||
class scoped_timed_lock
|
||||
{
|
||||
protected:
|
||||
recursive_timed_mutex& m;
|
||||
bool is_locked;
|
||||
public:
|
||||
scoped_timed_lock(recursive_timed_mutex& m_):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
scoped_timed_lock(recursive_timed_mutex& m_,::boost::xtime const& target):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
timed_lock(target);
|
||||
}
|
||||
scoped_timed_lock(recursive_timed_mutex& m_,bool do_lock):
|
||||
m(m_),is_locked(false)
|
||||
{
|
||||
if(do_lock)
|
||||
{
|
||||
lock();
|
||||
}
|
||||
}
|
||||
~scoped_timed_lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
m.unlock();
|
||||
}
|
||||
}
|
||||
|
||||
void lock()
|
||||
{
|
||||
if(locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
m.lock();
|
||||
is_locked=true;
|
||||
}
|
||||
bool try_lock()
|
||||
{
|
||||
is_locked=m.try_lock();
|
||||
return is_locked;
|
||||
}
|
||||
bool timed_lock(::boost::xtime const& target)
|
||||
{
|
||||
is_locked=m.timed_lock(target);
|
||||
return is_locked;
|
||||
}
|
||||
|
||||
void unlock()
|
||||
{
|
||||
if(!locked())
|
||||
{
|
||||
throw boost::lock_error();
|
||||
}
|
||||
m.unlock();
|
||||
is_locked=false;
|
||||
}
|
||||
|
||||
operator void* () const
|
||||
{
|
||||
return is_locked?const_cast<void*>(static_cast<void const*>(this)):0;
|
||||
}
|
||||
bool locked() const
|
||||
{
|
||||
return is_locked;
|
||||
}
|
||||
};
|
||||
|
||||
typedef scoped_timed_lock scoped_try_lock;
|
||||
typedef scoped_timed_lock scoped_lock;
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
#endif
|
||||
77
include/boost/thread/win32/thread.hpp
Normal file
77
include/boost/thread/win32/thread.hpp
Normal file
@@ -0,0 +1,77 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06041007_HPP
|
||||
#define BOOST_THREAD_RS06041007_HPP
|
||||
|
||||
#include <boost/thread/win32/config.hpp>
|
||||
|
||||
|
||||
#include <boost/utility.hpp>
|
||||
#include <boost/function.hpp>
|
||||
|
||||
#include <boost/thread/win32/mutex.hpp>
|
||||
#include <list>
|
||||
#include <memory>
|
||||
|
||||
namespace boost {
|
||||
|
||||
struct xtime;
|
||||
|
||||
// disable warnings about non dll import
|
||||
// see: http://www.boost.org/more/separate_compilation.html#dlls
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(push)
|
||||
# pragma warning(disable: 4251 4231 4660 4275)
|
||||
#endif
|
||||
|
||||
class BOOST_THREAD_DECL thread : private noncopyable
|
||||
{
|
||||
public:
|
||||
thread();
|
||||
explicit thread(const function0<void>& threadfunc);
|
||||
~thread();
|
||||
|
||||
bool operator==(const thread& other) const;
|
||||
bool operator!=(const thread& other) const;
|
||||
|
||||
void join();
|
||||
|
||||
static void sleep(const xtime& xt);
|
||||
static void yield();
|
||||
|
||||
private:
|
||||
void* m_thread;
|
||||
unsigned int m_id;
|
||||
bool m_joinable;
|
||||
};
|
||||
|
||||
class BOOST_THREAD_DECL thread_group : private noncopyable
|
||||
{
|
||||
public:
|
||||
thread_group();
|
||||
~thread_group();
|
||||
|
||||
thread* create_thread(const function0<void>& threadfunc);
|
||||
void add_thread(thread* thrd);
|
||||
void remove_thread(thread* thrd);
|
||||
void join_all();
|
||||
int size();
|
||||
|
||||
private:
|
||||
std::list<thread*> m_threads;
|
||||
mutex m_mutex;
|
||||
};
|
||||
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(pop)
|
||||
#endif
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_THREAD_RS06041007_HPP
|
||||
198
include/boost/thread/win32/thread_primitives.hpp
Normal file
198
include/boost/thread/win32/thread_primitives.hpp
Normal file
@@ -0,0 +1,198 @@
|
||||
#ifndef BOOST_WIN32_THREAD_PRIMITIVES_HPP
|
||||
#define BOOST_WIN32_THREAD_PRIMITIVES_HPP
|
||||
|
||||
// win32_thread_primitives.hpp
|
||||
//
|
||||
// (C) Copyright 2005-6 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <boost/config.hpp>
|
||||
#include <boost/assert.hpp>
|
||||
#include <boost/thread/exceptions.hpp>
|
||||
|
||||
#if defined( BOOST_USE_WINDOWS_H )
|
||||
# include <windows.h>
|
||||
namespace boost
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
namespace win32
|
||||
{
|
||||
typedef ULONG_PTR ulong_ptr;
|
||||
typedef HANDLE handle;
|
||||
unsigned const infinite=INFINITE;
|
||||
unsigned const timeout=WAIT_TIMEOUT;
|
||||
|
||||
using ::CreateMutexA;
|
||||
using ::CreateEventA;
|
||||
using ::CreateSemaphoreA;
|
||||
using ::CloseHandle;
|
||||
using ::ReleaseMutex;
|
||||
using ::ReleaseSemaphore;
|
||||
using ::SetEvent;
|
||||
using ::ResetEvent;
|
||||
using ::WaitForMultipleObjects;
|
||||
using ::WaitForSingleObject;
|
||||
using ::GetCurrentProcessId;
|
||||
using ::GetCurrentThreadId;
|
||||
using ::GetCurrentThread;
|
||||
using ::GetCurrentProcess;
|
||||
using ::DuplicateHandle;
|
||||
using ::SleepEx;
|
||||
using ::QueueUserAPC;
|
||||
}
|
||||
}
|
||||
}
|
||||
#elif defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ )
|
||||
namespace boost
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
namespace win32
|
||||
{
|
||||
|
||||
# ifdef _WIN64
|
||||
typedef unsigned __int64 ulong_ptr;
|
||||
# else
|
||||
typedef unsigned long ulong_ptr;
|
||||
# endif
|
||||
typedef void* handle;
|
||||
unsigned const infinite=~0U;
|
||||
unsigned const timeout=258U;
|
||||
|
||||
extern "C"
|
||||
{
|
||||
struct _SECURITY_ATTRIBUTES;
|
||||
__declspec(dllimport) void* __stdcall CreateMutexA(_SECURITY_ATTRIBUTES*,int,char const*);
|
||||
__declspec(dllimport) void* __stdcall CreateSemaphoreA(_SECURITY_ATTRIBUTES*,long,long,char const*);
|
||||
__declspec(dllimport) void* __stdcall CreateEventA(_SECURITY_ATTRIBUTES*,int,int,char const*);
|
||||
__declspec(dllimport) int __stdcall CloseHandle(void*);
|
||||
__declspec(dllimport) int __stdcall ReleaseMutex(void*);
|
||||
__declspec(dllimport) unsigned long __stdcall GetCurrentProcessId();
|
||||
__declspec(dllimport) unsigned long __stdcall GetCurrentThreadId();
|
||||
__declspec(dllimport) unsigned long __stdcall WaitForSingleObject(void*,unsigned long);
|
||||
__declspec(dllimport) int __stdcall ReleaseSemaphore(void*,long,long*);
|
||||
__declspec(dllimport) void* __stdcall GetCurrentThread();
|
||||
__declspec(dllimport) void* __stdcall GetCurrentProcess();
|
||||
__declspec(dllimport) int __stdcall DuplicateHandle(void*,void*,void*,void**,unsigned long,int,unsigned long);
|
||||
__declspec(dllimport) unsigned long __stdcall SleepEx(unsigned long,int);
|
||||
typedef void (__stdcall *queue_user_apc_callback_function)(ulong_ptr);
|
||||
__declspec(dllimport) unsigned long __stdcall QueueUserAPC(queue_user_apc_callback_function,void*,ulong_ptr);
|
||||
__declspec(dllimport) int __stdcall SetEvent(void*);
|
||||
__declspec(dllimport) int __stdcall ResetEvent(void*);
|
||||
__declspec(dllimport) unsigned long __stdcall WaitForMultipleObjects(unsigned long nCount,void* const * lpHandles,int bWaitAll,unsigned long dwMilliseconds);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#else
|
||||
# error "Win32 functions not available"
|
||||
#endif
|
||||
|
||||
namespace boost
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
namespace win32
|
||||
{
|
||||
enum event_type
|
||||
{
|
||||
auto_reset_event=false,
|
||||
manual_reset_event=true
|
||||
};
|
||||
|
||||
enum initial_event_state
|
||||
{
|
||||
event_initially_reset=false,
|
||||
event_initially_set=true
|
||||
};
|
||||
|
||||
inline handle create_anonymous_event(event_type type,initial_event_state state)
|
||||
{
|
||||
handle const res=CreateEventA(0,type,state,0);
|
||||
return res?res:throw thread_resource_error();
|
||||
}
|
||||
|
||||
inline handle create_anonymous_semaphore(long initial_count,long max_count)
|
||||
{
|
||||
handle const res=CreateSemaphoreA(NULL,initial_count,max_count,NULL);
|
||||
return res?res:throw thread_resource_error();
|
||||
}
|
||||
|
||||
inline handle duplicate_handle(handle source)
|
||||
{
|
||||
handle const current_process=GetCurrentProcess();
|
||||
long const same_access_flag=2;
|
||||
handle new_handle=0;
|
||||
bool const success=DuplicateHandle(current_process,source,current_process,&new_handle,0,false,same_access_flag)!=0;
|
||||
return success?new_handle:throw thread_resource_error();
|
||||
}
|
||||
|
||||
inline void release_semaphore(handle semaphore,long count)
|
||||
{
|
||||
bool const success=ReleaseSemaphore(semaphore,count,0)!=0;
|
||||
BOOST_ASSERT(success);
|
||||
}
|
||||
|
||||
class handle_manager
|
||||
{
|
||||
private:
|
||||
handle handle_to_manage;
|
||||
handle_manager(handle_manager&);
|
||||
handle_manager& operator=(handle_manager&);
|
||||
|
||||
void cleanup()
|
||||
{
|
||||
if(handle_to_manage)
|
||||
{
|
||||
unsigned long result=CloseHandle(handle_to_manage);
|
||||
BOOST_ASSERT(result);
|
||||
}
|
||||
}
|
||||
|
||||
public:
|
||||
explicit handle_manager(handle handle_to_manage_):
|
||||
handle_to_manage(handle_to_manage_)
|
||||
{}
|
||||
handle_manager():
|
||||
handle_to_manage(0)
|
||||
{}
|
||||
|
||||
handle_manager& operator=(handle new_handle)
|
||||
{
|
||||
cleanup();
|
||||
handle_to_manage=new_handle;
|
||||
}
|
||||
|
||||
operator handle() const
|
||||
{
|
||||
return handle_to_manage;
|
||||
}
|
||||
|
||||
handle release()
|
||||
{
|
||||
handle const res=handle_to_manage;
|
||||
handle_to_manage=0;
|
||||
return res;
|
||||
}
|
||||
|
||||
bool operator!() const
|
||||
{
|
||||
return !handle_to_manage;
|
||||
}
|
||||
|
||||
~handle_manager()
|
||||
{
|
||||
cleanup();
|
||||
}
|
||||
};
|
||||
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#endif
|
||||
106
include/boost/thread/win32/tss.hpp
Normal file
106
include/boost/thread/win32/tss.hpp
Normal file
@@ -0,0 +1,106 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Copyright (C) 2006 Roland Schwarz
|
||||
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_TSS_RS06092305_HPP
|
||||
#define BOOST_TSS_RS06092305_HPP
|
||||
|
||||
#include <boost/thread/win32/config.hpp>
|
||||
|
||||
#include <boost/utility.hpp>
|
||||
#include <boost/function.hpp>
|
||||
#include <boost/thread/win32/exceptions.hpp>
|
||||
|
||||
namespace boost {
|
||||
|
||||
// disable warnings about non dll import
|
||||
// see: http://www.boost.org/more/separate_compilation.html#dlls
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(push)
|
||||
# pragma warning(disable: 4251 4231 4660 4275)
|
||||
#endif
|
||||
|
||||
namespace detail {
|
||||
|
||||
class BOOST_THREAD_DECL tss : private noncopyable
|
||||
{
|
||||
public:
|
||||
tss(boost::function1<void, void*>* pcleanup) {
|
||||
if (pcleanup == 0) throw boost::thread_resource_error();
|
||||
try
|
||||
{
|
||||
init(pcleanup);
|
||||
}
|
||||
catch (...)
|
||||
{
|
||||
delete pcleanup;
|
||||
throw boost::thread_resource_error();
|
||||
}
|
||||
}
|
||||
|
||||
void* get() const;
|
||||
void set(void* value);
|
||||
void cleanup(void* p);
|
||||
|
||||
private:
|
||||
unsigned int m_slot; //This is a "pseudo-slot", not a native slot
|
||||
|
||||
void init(boost::function1<void, void*>* pcleanup);
|
||||
};
|
||||
|
||||
template <typename T>
|
||||
struct tss_adapter
|
||||
{
|
||||
template <typename F>
|
||||
tss_adapter(const F& cleanup) : m_cleanup(cleanup) { }
|
||||
void operator()(void* p) { m_cleanup(static_cast<T*>(p)); }
|
||||
boost::function1<void, T*> m_cleanup;
|
||||
};
|
||||
|
||||
} // namespace detail
|
||||
|
||||
template <typename T>
|
||||
class thread_specific_ptr : private noncopyable
|
||||
{
|
||||
public:
|
||||
thread_specific_ptr()
|
||||
: m_tss(new boost::function1<void, void*>(
|
||||
boost::detail::tss_adapter<T>(
|
||||
&thread_specific_ptr<T>::cleanup)))
|
||||
{
|
||||
}
|
||||
thread_specific_ptr(void (*clean)(T*))
|
||||
: m_tss(new boost::function1<void, void*>(
|
||||
boost::detail::tss_adapter<T>(clean)))
|
||||
{
|
||||
}
|
||||
~thread_specific_ptr() { reset(); }
|
||||
|
||||
T* get() const { return static_cast<T*>(m_tss.get()); }
|
||||
T* operator->() const { return get(); }
|
||||
T& operator*() const { return *get(); }
|
||||
T* release() { T* temp = get(); if (temp) m_tss.set(0); return temp; }
|
||||
void reset(T* p=0)
|
||||
{
|
||||
T* cur = get();
|
||||
if (cur == p) return;
|
||||
m_tss.set(p);
|
||||
if (cur) m_tss.cleanup(cur);
|
||||
}
|
||||
|
||||
private:
|
||||
static void cleanup(T* p) { delete p; }
|
||||
detail::tss m_tss;
|
||||
};
|
||||
|
||||
#ifdef BOOST_MSVC
|
||||
# pragma warning(pop)
|
||||
#endif
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif //BOOST_TSS_RS06092305_HPP
|
||||
74
include/boost/thread/win32/tss_hooks.hpp
Normal file
74
include/boost/thread/win32/tss_hooks.hpp
Normal file
@@ -0,0 +1,74 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Copyright (C) Michael Glassford 2004.
|
||||
// Copyright (C) 2006 Roland Schwarz
|
||||
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_TLS_HOOKS_RS06092306_HPP
|
||||
#define BOOST_TLS_HOOKS_RS06092306_HPP
|
||||
|
||||
#include <boost/thread/win32/config.hpp>
|
||||
|
||||
typedef void (__cdecl *thread_exit_handler)(void);
|
||||
|
||||
extern "C" BOOST_THREAD_DECL int at_thread_exit(
|
||||
thread_exit_handler exit_handler
|
||||
);
|
||||
//Add a function to the list of functions that will
|
||||
//be called when a thread is about to exit.
|
||||
//Currently only implemented for Win32, but should
|
||||
//later be implemented for all platforms.
|
||||
//Used by Win32 implementation of Boost.Threads
|
||||
//tss to perform cleanup.
|
||||
//Like the C runtime library atexit() function,
|
||||
//which it mimics, at_thread_exit() returns
|
||||
//zero if successful and a nonzero
|
||||
//value if an error occurs.
|
||||
|
||||
extern "C" BOOST_THREAD_DECL void on_process_enter(void);
|
||||
//Function to be called when the exe or dll
|
||||
//that uses Boost.Threads first starts
|
||||
//or is first loaded.
|
||||
//Should be called only before the first call to
|
||||
//on_thread_enter().
|
||||
//Called automatically by Boost.Threads when
|
||||
//a method for doing so has been discovered.
|
||||
//May be omitted; may be called multiple times.
|
||||
|
||||
extern "C" BOOST_THREAD_DECL void on_process_exit(void);
|
||||
//Function to be called when the exe or dll
|
||||
//that uses Boost.Threads first starts
|
||||
//or is first loaded.
|
||||
//Should be called only after the last call to
|
||||
//on_exit_thread().
|
||||
//Called automatically by Boost.Threads when
|
||||
//a method for doing so has been discovered.
|
||||
//Must not be omitted; may be called multiple times.
|
||||
|
||||
extern "C" BOOST_THREAD_DECL void on_thread_enter(void);
|
||||
//Function to be called just after a thread starts
|
||||
//in an exe or dll that uses Boost.Threads.
|
||||
//Must be called in the context of the thread
|
||||
//that is starting.
|
||||
//Called automatically by Boost.Threads when
|
||||
//a method for doing so has been discovered.
|
||||
//May be omitted; may be called multiple times.
|
||||
|
||||
extern "C" BOOST_THREAD_DECL void on_thread_exit(void);
|
||||
//Function to be called just be fore a thread ends
|
||||
//in an exe or dll that uses Boost.Threads.
|
||||
//Must be called in the context of the thread
|
||||
//that is ending.
|
||||
//Called automatically by Boost.Threads when
|
||||
//a method for doing so has been discovered.
|
||||
//Must not be omitted; may be called multiple times.
|
||||
|
||||
extern "C" void tss_cleanup_implemented(void);
|
||||
//Dummy function used both to detect whether tss cleanup
|
||||
//cleanup has been implemented and to force
|
||||
//it to be linked into the Boost.Threads library.
|
||||
|
||||
#endif //BOOST_TLS_HOOKS_RS06092306_HPP
|
||||
56
include/boost/thread/win32/xtime.hpp
Normal file
56
include/boost/thread/win32/xtime.hpp
Normal file
@@ -0,0 +1,56 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06041006_HPP
|
||||
#define BOOST_THREAD_RS06041006_HPP
|
||||
|
||||
#include <boost/thread/win32/config.hpp>
|
||||
|
||||
#include <boost/cstdint.hpp>
|
||||
|
||||
namespace boost {
|
||||
|
||||
enum xtime_clock_types
|
||||
{
|
||||
TIME_UTC=1
|
||||
// TIME_TAI,
|
||||
// TIME_MONOTONIC,
|
||||
// TIME_PROCESS,
|
||||
// TIME_THREAD,
|
||||
// TIME_LOCAL,
|
||||
// TIME_SYNC,
|
||||
// TIME_RESOLUTION
|
||||
};
|
||||
|
||||
struct xtime
|
||||
{
|
||||
#if defined(BOOST_NO_INT64_T)
|
||||
typedef int_fast32_t xtime_sec_t; //INT_FAST32_MIN <= sec <= INT_FAST32_MAX
|
||||
#else
|
||||
typedef int_fast64_t xtime_sec_t; //INT_FAST64_MIN <= sec <= INT_FAST64_MAX
|
||||
#endif
|
||||
|
||||
typedef int_fast32_t xtime_nsec_t; //0 <= xtime.nsec < NANOSECONDS_PER_SECOND
|
||||
|
||||
xtime_sec_t sec;
|
||||
xtime_nsec_t nsec;
|
||||
};
|
||||
|
||||
int BOOST_THREAD_DECL xtime_get(struct xtime* xtp, int clock_type);
|
||||
|
||||
inline int xtime_cmp(const xtime& xt1, const xtime& xt2)
|
||||
{
|
||||
if (xt1.sec == xt2.sec)
|
||||
return (int)(xt1.nsec - xt2.nsec);
|
||||
else
|
||||
return (xt1.sec > xt2.sec) ? 1 : -1;
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif //BOOST_THREAD_RS06041006_HPP
|
||||
85
include/boost/thread/win32/xtime_utils.hpp
Normal file
85
include/boost/thread/win32/xtime_utils.hpp
Normal file
@@ -0,0 +1,85 @@
|
||||
#ifndef BOOST_THREAD_DETAIL_XTIME_UTILS_HPP
|
||||
#define BOOST_THREAD_DETAIL_XTIME_UTILS_HPP
|
||||
|
||||
// xtime_utils.hpp
|
||||
//
|
||||
// (C) Copyright 2005 Anthony Williams
|
||||
//
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
#include <boost/thread/win32/xtime.hpp>
|
||||
#include <limits>
|
||||
|
||||
namespace boost
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
inline ::boost::xtime get_xtime_sentinel()
|
||||
{
|
||||
boost::xtime const sentinel={
|
||||
(std::numeric_limits<boost::xtime::xtime_sec_t>::max)(),
|
||||
(std::numeric_limits<boost::xtime::xtime_nsec_t>::max)()
|
||||
};
|
||||
return sentinel;
|
||||
|
||||
}
|
||||
|
||||
// get the number of milliseconds from now to target
|
||||
// if target is in the past, return 0
|
||||
// if target cannot be represented as unsigned long, return
|
||||
// the maximum instead
|
||||
// 2006-08-04 <roland>
|
||||
inline unsigned long get_milliseconds_until_time(::boost::xtime target)
|
||||
{
|
||||
if(!boost::xtime_cmp(target,get_xtime_sentinel()))
|
||||
{
|
||||
return (std::numeric_limits<unsigned long>::max)();
|
||||
}
|
||||
|
||||
boost::xtime now;
|
||||
boost::xtime_get(&now, boost::TIME_UTC);
|
||||
|
||||
if (target.sec < now.sec)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
boost::xtime::xtime_nsec_t const nanoseconds_per_second=1000000000;
|
||||
boost::xtime::xtime_nsec_t const milliseconds_per_second=1000;
|
||||
boost::xtime::xtime_nsec_t const nanoseconds_per_millisecond=nanoseconds_per_second/milliseconds_per_second;
|
||||
if (target.nsec < now.nsec)
|
||||
{
|
||||
if (target.sec == now.sec)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
target.nsec += nanoseconds_per_second - now.nsec;
|
||||
target.sec -= now.sec + 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
target.nsec -= now.nsec;
|
||||
target.sec -= now.sec;
|
||||
}
|
||||
// we are throwing away some bits, but one second after having
|
||||
// waited for 49 years does not really matter ...
|
||||
if (target.sec < (std::numeric_limits<unsigned long>::max)()/milliseconds_per_second)
|
||||
{
|
||||
return static_cast<unsigned long>(
|
||||
target.sec*milliseconds_per_second +
|
||||
(target.nsec+nanoseconds_per_millisecond/2)/nanoseconds_per_millisecond);
|
||||
}
|
||||
else
|
||||
{
|
||||
return (std::numeric_limits<unsigned long>::max)();
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#endif
|
||||
16
include/boost/thread/xtime.hpp
Normal file
16
include/boost/thread/xtime.hpp
Normal file
@@ -0,0 +1,16 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#ifndef BOOST_THREAD_RS06040712_HPP
|
||||
#define BOOST_THREAD_RS06040712_HPP
|
||||
|
||||
#include <boost/thread/detail/platform.hpp>
|
||||
#include BOOST_THREAD_PLATFORM(xtime.hpp)
|
||||
|
||||
#endif // BOOST_THREAD_RS06040712_HPP
|
||||
|
||||
8
index.html
Normal file
8
index.html
Normal file
@@ -0,0 +1,8 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0; URL=doc/index.html">
|
||||
</head>
|
||||
<body>
|
||||
Automatic redirection failed, please go to <a href="doc/index.html">doc/index.html</a>
|
||||
</body>
|
||||
</html>
|
||||
98
src/pthread/condition.cpp
Normal file
98
src/pthread/condition.cpp
Normal file
@@ -0,0 +1,98 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
#include <boost/thread/pthread/condition.hpp>
|
||||
|
||||
#include <boost/thread/pthread/xtime.hpp>
|
||||
#include <boost/thread/pthread/thread.hpp>
|
||||
#include <boost/thread/exceptions.hpp>
|
||||
|
||||
#include <boost/limits.hpp>
|
||||
#include <cassert>
|
||||
#include <limits>
|
||||
|
||||
#include <errno.h>
|
||||
|
||||
namespace boost {
|
||||
|
||||
namespace detail {
|
||||
|
||||
condition_impl::condition_impl()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_cond_init(&m_condition, 0);
|
||||
if (res != 0)
|
||||
throw thread_resource_error();
|
||||
}
|
||||
|
||||
condition_impl::~condition_impl()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_cond_destroy(&m_condition);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void condition_impl::notify_one()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_cond_signal(&m_condition);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void condition_impl::notify_all()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_cond_broadcast(&m_condition);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void condition_impl::do_wait(pthread_mutex_t* pmutex)
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_cond_wait(&m_condition, pmutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
bool condition_impl::do_timed_wait(const xtime& xt, pthread_mutex_t* pmutex)
|
||||
{
|
||||
boost::xtime t;
|
||||
// normalize, in case user has specified nsec only
|
||||
if (xt.nsec > 999999999)
|
||||
{
|
||||
t.sec = xt.nsec / 1000000000;
|
||||
t.nsec = xt.nsec % 1000000000;
|
||||
}
|
||||
else
|
||||
{
|
||||
t.sec = t.nsec = 0;
|
||||
}
|
||||
|
||||
timespec ts;
|
||||
if (xt.sec < std::numeric_limits<time_t>::max() - t.sec) // avoid overflow
|
||||
{
|
||||
ts.tv_sec = static_cast<time_t>(xt.sec + t.sec);
|
||||
ts.tv_nsec = static_cast<long>(t.nsec);
|
||||
}
|
||||
else
|
||||
{ // saturate to avoid overflow
|
||||
ts.tv_sec = std::numeric_limits<time_t>::max();
|
||||
ts.tv_nsec = 999999999; // this should not overflow, or tv_nsec is odd anyways...
|
||||
}
|
||||
// to_timespec(xt, ts);
|
||||
|
||||
int res = 0;
|
||||
res = pthread_cond_timedwait(&m_condition, pmutex, &ts);
|
||||
assert(res == 0 || res == ETIMEDOUT);
|
||||
|
||||
return res != ETIMEDOUT;
|
||||
}
|
||||
|
||||
} // namespace detail
|
||||
|
||||
} // namespace boost
|
||||
150
src/pthread/exceptions.cpp
Normal file
150
src/pthread/exceptions.cpp
Normal file
@@ -0,0 +1,150 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
#include <boost/thread/pthread/exceptions.hpp>
|
||||
#include <cstring>
|
||||
#include <string>
|
||||
|
||||
# ifdef BOOST_NO_STDC_NAMESPACE
|
||||
namespace std { using ::strerror; }
|
||||
# endif
|
||||
|
||||
#include <errno.h> // for POSIX error codes
|
||||
|
||||
namespace
|
||||
{
|
||||
|
||||
std::string system_message(int sys_err_code)
|
||||
{
|
||||
std::string str;
|
||||
str += std::strerror(errno);
|
||||
return str;
|
||||
}
|
||||
|
||||
} // unnamed namespace
|
||||
|
||||
namespace boost {
|
||||
|
||||
thread_exception::thread_exception()
|
||||
: m_sys_err(0)
|
||||
{
|
||||
}
|
||||
|
||||
thread_exception::thread_exception(int sys_err_code)
|
||||
: m_sys_err(sys_err_code)
|
||||
{
|
||||
}
|
||||
|
||||
thread_exception::~thread_exception() throw()
|
||||
{
|
||||
}
|
||||
|
||||
int thread_exception::native_error() const
|
||||
{
|
||||
return m_sys_err;
|
||||
}
|
||||
|
||||
const char* thread_exception::message() const
|
||||
{
|
||||
if (m_sys_err != 0)
|
||||
return system_message(m_sys_err).c_str();
|
||||
return what();
|
||||
}
|
||||
|
||||
lock_error::lock_error()
|
||||
{
|
||||
}
|
||||
|
||||
lock_error::lock_error(int sys_err_code)
|
||||
: thread_exception(sys_err_code)
|
||||
{
|
||||
}
|
||||
|
||||
lock_error::~lock_error() throw()
|
||||
{
|
||||
}
|
||||
|
||||
const char* lock_error::what() const throw()
|
||||
{
|
||||
return "boost::lock_error";
|
||||
}
|
||||
|
||||
thread_resource_error::thread_resource_error()
|
||||
{
|
||||
}
|
||||
|
||||
thread_resource_error::thread_resource_error(int sys_err_code)
|
||||
: thread_exception(sys_err_code)
|
||||
{
|
||||
}
|
||||
|
||||
thread_resource_error::~thread_resource_error() throw()
|
||||
{
|
||||
}
|
||||
|
||||
const char* thread_resource_error::what() const throw()
|
||||
{
|
||||
return "boost::thread_resource_error";
|
||||
}
|
||||
|
||||
unsupported_thread_option::unsupported_thread_option()
|
||||
{
|
||||
}
|
||||
|
||||
unsupported_thread_option::unsupported_thread_option(int sys_err_code)
|
||||
: thread_exception(sys_err_code)
|
||||
{
|
||||
}
|
||||
|
||||
unsupported_thread_option::~unsupported_thread_option() throw()
|
||||
{
|
||||
}
|
||||
|
||||
const char* unsupported_thread_option::what() const throw()
|
||||
{
|
||||
return "boost::unsupported_thread_option";
|
||||
}
|
||||
|
||||
invalid_thread_argument::invalid_thread_argument()
|
||||
{
|
||||
}
|
||||
|
||||
invalid_thread_argument::invalid_thread_argument(int sys_err_code)
|
||||
: thread_exception(sys_err_code)
|
||||
{
|
||||
}
|
||||
|
||||
invalid_thread_argument::~invalid_thread_argument() throw()
|
||||
{
|
||||
}
|
||||
|
||||
const char* invalid_thread_argument::what() const throw()
|
||||
{
|
||||
return "boost::invalid_thread_argument";
|
||||
}
|
||||
|
||||
thread_permission_error::thread_permission_error()
|
||||
{
|
||||
}
|
||||
|
||||
thread_permission_error::thread_permission_error(int sys_err_code)
|
||||
: thread_exception(sys_err_code)
|
||||
{
|
||||
}
|
||||
|
||||
thread_permission_error::~thread_permission_error() throw()
|
||||
{
|
||||
}
|
||||
|
||||
const char* thread_permission_error::what() const throw()
|
||||
{
|
||||
return "boost::thread_permission_error";
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
278
src/pthread/mutex.cpp
Normal file
278
src/pthread/mutex.cpp
Normal file
@@ -0,0 +1,278 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
#include <boost/thread/pthread/mutex.hpp>
|
||||
|
||||
#include <boost/thread/pthread/xtime.hpp>
|
||||
#include <boost/thread/pthread/thread.hpp>
|
||||
#include <boost/thread/exceptions.hpp>
|
||||
#include <boost/limits.hpp>
|
||||
#include <string>
|
||||
#include <stdexcept>
|
||||
#include <cassert>
|
||||
#include <limits>
|
||||
|
||||
#include <errno.h>
|
||||
|
||||
namespace boost {
|
||||
|
||||
mutex::mutex()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_init(&m_mutex, 0);
|
||||
if (res != 0)
|
||||
throw thread_resource_error();
|
||||
}
|
||||
|
||||
mutex::~mutex()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_destroy(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void mutex::do_lock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
if (res == EDEADLK) throw lock_error();
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void mutex::do_unlock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
if (res == EPERM) throw lock_error();
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void mutex::do_lock(cv_state&)
|
||||
{
|
||||
}
|
||||
|
||||
void mutex::do_unlock(cv_state& state)
|
||||
{
|
||||
state.pmutex = &m_mutex;
|
||||
}
|
||||
|
||||
try_mutex::try_mutex()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_init(&m_mutex, 0);
|
||||
if (res != 0)
|
||||
throw thread_resource_error();
|
||||
}
|
||||
|
||||
try_mutex::~try_mutex()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_destroy(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void try_mutex::do_lock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
if (res == EDEADLK) throw lock_error();
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
bool try_mutex::do_trylock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_trylock(&m_mutex);
|
||||
if (res == EDEADLK) throw lock_error();
|
||||
assert(res == 0 || res == EBUSY);
|
||||
return res == 0;
|
||||
}
|
||||
|
||||
void try_mutex::do_unlock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
if (res == EPERM) throw lock_error();
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void try_mutex::do_lock(cv_state&)
|
||||
{
|
||||
}
|
||||
|
||||
void try_mutex::do_unlock(cv_state& state)
|
||||
{
|
||||
state.pmutex = &m_mutex;
|
||||
}
|
||||
|
||||
timed_mutex::timed_mutex()
|
||||
: m_locked(false)
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_init(&m_mutex, 0);
|
||||
if (res != 0)
|
||||
throw thread_resource_error();
|
||||
|
||||
res = pthread_cond_init(&m_condition, 0);
|
||||
if (res != 0)
|
||||
{
|
||||
pthread_mutex_destroy(&m_mutex);
|
||||
throw thread_resource_error();
|
||||
}
|
||||
}
|
||||
|
||||
timed_mutex::~timed_mutex()
|
||||
{
|
||||
assert(!m_locked);
|
||||
int res = 0;
|
||||
res = pthread_mutex_destroy(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
res = pthread_cond_destroy(&m_condition);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void timed_mutex::do_lock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
while (m_locked)
|
||||
{
|
||||
res = pthread_cond_wait(&m_condition, &m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
assert(!m_locked);
|
||||
m_locked = true;
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
bool timed_mutex::do_trylock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
bool ret = false;
|
||||
if (!m_locked)
|
||||
{
|
||||
m_locked = true;
|
||||
ret = true;
|
||||
}
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
return ret;
|
||||
}
|
||||
|
||||
bool timed_mutex::do_timedlock(const xtime& xt)
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
boost::xtime t;
|
||||
// normalize, in case user has specified nsec only
|
||||
if (xt.nsec > 999999999)
|
||||
{
|
||||
t.sec = xt.nsec / 1000000000;
|
||||
t.nsec = xt.nsec % 1000000000;
|
||||
}
|
||||
else
|
||||
{
|
||||
t.sec = t.nsec = 0;
|
||||
}
|
||||
|
||||
timespec ts;
|
||||
if (xt.sec < std::numeric_limits<time_t>::max() - t.sec) // avoid overflow
|
||||
{
|
||||
ts.tv_sec = static_cast<time_t>(xt.sec + t.sec);
|
||||
ts.tv_nsec = static_cast<long>(t.nsec);
|
||||
}
|
||||
else
|
||||
{ // saturate to avoid overflow
|
||||
ts.tv_sec = std::numeric_limits<time_t>::max();
|
||||
ts.tv_nsec = 999999999; // this should not overflow, or tv_nsec is odd anyways...
|
||||
}
|
||||
// to_timespec(xt, ts);
|
||||
|
||||
while (m_locked)
|
||||
{
|
||||
res = pthread_cond_timedwait(&m_condition, &m_mutex, &ts);
|
||||
assert(res == 0 || res == ETIMEDOUT);
|
||||
|
||||
if (res == ETIMEDOUT)
|
||||
break;
|
||||
}
|
||||
|
||||
bool ret = false;
|
||||
if (!m_locked)
|
||||
{
|
||||
m_locked = true;
|
||||
ret = true;
|
||||
}
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
return ret;
|
||||
}
|
||||
|
||||
void timed_mutex::do_unlock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
assert(m_locked);
|
||||
m_locked = false;
|
||||
|
||||
res = pthread_cond_signal(&m_condition);
|
||||
assert(res == 0);
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void timed_mutex::do_lock(cv_state&)
|
||||
{
|
||||
int res = 0;
|
||||
while (m_locked)
|
||||
{
|
||||
res = pthread_cond_wait(&m_condition, &m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
assert(!m_locked);
|
||||
m_locked = true;
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void timed_mutex::do_unlock(cv_state& state)
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
assert(m_locked);
|
||||
m_locked = false;
|
||||
|
||||
res = pthread_cond_signal(&m_condition);
|
||||
assert(res == 0);
|
||||
|
||||
state.pmutex = &m_mutex;
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
|
||||
589
src/pthread/recursive_mutex.cpp
Normal file
589
src/pthread/recursive_mutex.cpp
Normal file
@@ -0,0 +1,589 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Copyright (C) 2006 Roland Schwarz
|
||||
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
#include <boost/thread/pthread/recursive_mutex.hpp>
|
||||
|
||||
#include <boost/thread/pthread/xtime.hpp>
|
||||
#include <boost/thread/pthread/thread.hpp>
|
||||
|
||||
#include <boost/limits.hpp>
|
||||
#include <string>
|
||||
#include <stdexcept>
|
||||
#include <cassert>
|
||||
#include <limits>
|
||||
|
||||
#include <errno.h>
|
||||
|
||||
namespace boost {
|
||||
|
||||
recursive_mutex::recursive_mutex()
|
||||
: m_count(0)
|
||||
#if !defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
, m_valid_id(false)
|
||||
#endif
|
||||
{
|
||||
pthread_mutexattr_t attr;
|
||||
int res = pthread_mutexattr_init(&attr);
|
||||
assert(res == 0);
|
||||
|
||||
#if defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
res = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
|
||||
assert(res == 0);
|
||||
#endif
|
||||
|
||||
res = pthread_mutex_init(&m_mutex, &attr);
|
||||
{
|
||||
# ifndef NDEBUG
|
||||
int res =
|
||||
# endif
|
||||
pthread_mutexattr_destroy(&attr);
|
||||
assert(res == 0);
|
||||
}
|
||||
if (res != 0)
|
||||
throw thread_resource_error();
|
||||
|
||||
#if !defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
res = pthread_cond_init(&m_unlocked, 0);
|
||||
if (res != 0)
|
||||
{
|
||||
pthread_mutex_destroy(&m_mutex);
|
||||
throw thread_resource_error();
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
recursive_mutex::~recursive_mutex()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_destroy(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
#if !defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
res = pthread_cond_destroy(&m_unlocked);
|
||||
assert(res == 0);
|
||||
#endif
|
||||
}
|
||||
|
||||
void recursive_mutex::do_lock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
#if defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
if (++m_count > 1)
|
||||
{
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
#else
|
||||
pthread_t tid = pthread_self();
|
||||
if (m_valid_id && pthread_equal(m_thread_id, tid))
|
||||
++m_count;
|
||||
else
|
||||
{
|
||||
while (m_valid_id)
|
||||
{
|
||||
res = pthread_cond_wait(&m_unlocked, &m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
m_thread_id = tid;
|
||||
m_valid_id = true;
|
||||
m_count = 1;
|
||||
}
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
#endif
|
||||
}
|
||||
|
||||
void recursive_mutex::do_unlock()
|
||||
{
|
||||
#if defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
if (--m_count == 0)
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
#else
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
pthread_t tid = pthread_self();
|
||||
if (m_valid_id && !pthread_equal(m_thread_id, tid))
|
||||
{
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
throw lock_error();
|
||||
}
|
||||
|
||||
if (--m_count == 0)
|
||||
{
|
||||
assert(m_valid_id);
|
||||
m_valid_id = false;
|
||||
|
||||
res = pthread_cond_signal(&m_unlocked);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
#endif
|
||||
}
|
||||
|
||||
void recursive_mutex::do_lock(cv_state& state)
|
||||
{
|
||||
#if defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
m_count = state.count;
|
||||
#else
|
||||
int res = 0;
|
||||
|
||||
while (m_valid_id)
|
||||
{
|
||||
res = pthread_cond_wait(&m_unlocked, &m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
m_thread_id = pthread_self();
|
||||
m_valid_id = true;
|
||||
m_count = state.count;
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
#endif
|
||||
}
|
||||
|
||||
void recursive_mutex::do_unlock(cv_state& state)
|
||||
{
|
||||
#if !defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
assert(m_valid_id);
|
||||
m_valid_id = false;
|
||||
|
||||
res = pthread_cond_signal(&m_unlocked);
|
||||
assert(res == 0);
|
||||
#endif
|
||||
|
||||
state.pmutex = &m_mutex;
|
||||
state.count = m_count;
|
||||
m_count = 0;
|
||||
}
|
||||
|
||||
recursive_try_mutex::recursive_try_mutex()
|
||||
: m_count(0)
|
||||
#if !defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
, m_valid_id(false)
|
||||
#endif
|
||||
{
|
||||
pthread_mutexattr_t attr;
|
||||
int res = pthread_mutexattr_init(&attr);
|
||||
assert(res == 0);
|
||||
|
||||
#if defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
res = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
|
||||
assert(res == 0);
|
||||
#endif
|
||||
|
||||
res = pthread_mutex_init(&m_mutex, &attr);
|
||||
{
|
||||
# ifndef NDEBUG
|
||||
int res =
|
||||
# endif
|
||||
pthread_mutexattr_destroy(&attr);
|
||||
assert(res == 0);
|
||||
}
|
||||
if (res != 0)
|
||||
throw thread_resource_error();
|
||||
|
||||
#if !defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
res = pthread_cond_init(&m_unlocked, 0);
|
||||
if (res != 0)
|
||||
{
|
||||
pthread_mutex_destroy(&m_mutex);
|
||||
throw thread_resource_error();
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
recursive_try_mutex::~recursive_try_mutex()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_destroy(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
#if !defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
res = pthread_cond_destroy(&m_unlocked);
|
||||
assert(res == 0);
|
||||
#endif
|
||||
}
|
||||
|
||||
void recursive_try_mutex::do_lock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
#if defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
if (++m_count > 1)
|
||||
{
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
#else
|
||||
pthread_t tid = pthread_self();
|
||||
if (m_valid_id && pthread_equal(m_thread_id, tid))
|
||||
++m_count;
|
||||
else
|
||||
{
|
||||
while (m_valid_id)
|
||||
{
|
||||
res = pthread_cond_wait(&m_unlocked, &m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
m_thread_id = tid;
|
||||
m_valid_id = true;
|
||||
m_count = 1;
|
||||
}
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
#endif
|
||||
}
|
||||
|
||||
bool recursive_try_mutex::do_trylock()
|
||||
{
|
||||
#if defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
int res = 0;
|
||||
res = pthread_mutex_trylock(&m_mutex);
|
||||
assert(res == 0 || res == EBUSY);
|
||||
|
||||
if (res == 0)
|
||||
{
|
||||
if (++m_count > 1)
|
||||
{
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
#else
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
bool ret = false;
|
||||
pthread_t tid = pthread_self();
|
||||
if (m_valid_id && pthread_equal(m_thread_id, tid))
|
||||
{
|
||||
++m_count;
|
||||
ret = true;
|
||||
}
|
||||
else if (!m_valid_id)
|
||||
{
|
||||
m_thread_id = tid;
|
||||
m_valid_id = true;
|
||||
m_count = 1;
|
||||
ret = true;
|
||||
}
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
return ret;
|
||||
#endif
|
||||
}
|
||||
|
||||
void recursive_try_mutex::do_unlock()
|
||||
{
|
||||
#if defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
if (--m_count == 0)
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
#else
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
pthread_t tid = pthread_self();
|
||||
if (m_valid_id && !pthread_equal(m_thread_id, tid))
|
||||
{
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
throw lock_error();
|
||||
}
|
||||
|
||||
if (--m_count == 0)
|
||||
{
|
||||
assert(m_valid_id);
|
||||
m_valid_id = false;
|
||||
|
||||
res = pthread_cond_signal(&m_unlocked);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
#endif
|
||||
}
|
||||
|
||||
void recursive_try_mutex::do_lock(cv_state& state)
|
||||
{
|
||||
#if defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
m_count = state.count;
|
||||
#else
|
||||
int res = 0;
|
||||
|
||||
while (m_valid_id)
|
||||
{
|
||||
res = pthread_cond_wait(&m_unlocked, &m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
m_thread_id = pthread_self();
|
||||
m_valid_id = true;
|
||||
m_count = state.count;
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
#endif
|
||||
}
|
||||
|
||||
void recursive_try_mutex::do_unlock(cv_state& state)
|
||||
{
|
||||
#if !defined(BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE)
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
assert(m_valid_id);
|
||||
m_valid_id = false;
|
||||
|
||||
res = pthread_cond_signal(&m_unlocked);
|
||||
assert(res == 0);
|
||||
#endif
|
||||
|
||||
state.pmutex = &m_mutex;
|
||||
state.count = m_count;
|
||||
m_count = 0;
|
||||
}
|
||||
|
||||
recursive_timed_mutex::recursive_timed_mutex()
|
||||
: m_valid_id(false), m_count(0)
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_init(&m_mutex, 0);
|
||||
if (res != 0)
|
||||
throw thread_resource_error();
|
||||
|
||||
res = pthread_cond_init(&m_unlocked, 0);
|
||||
if (res != 0)
|
||||
{
|
||||
pthread_mutex_destroy(&m_mutex);
|
||||
throw thread_resource_error();
|
||||
}
|
||||
}
|
||||
|
||||
recursive_timed_mutex::~recursive_timed_mutex()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_destroy(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
res = pthread_cond_destroy(&m_unlocked);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void recursive_timed_mutex::do_lock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
pthread_t tid = pthread_self();
|
||||
if (m_valid_id && pthread_equal(m_thread_id, tid))
|
||||
++m_count;
|
||||
else
|
||||
{
|
||||
while (m_valid_id)
|
||||
{
|
||||
res = pthread_cond_wait(&m_unlocked, &m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
m_thread_id = tid;
|
||||
m_valid_id = true;
|
||||
m_count = 1;
|
||||
}
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
bool recursive_timed_mutex::do_trylock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
bool ret = false;
|
||||
pthread_t tid = pthread_self();
|
||||
if (m_valid_id && pthread_equal(m_thread_id, tid))
|
||||
{
|
||||
++m_count;
|
||||
ret = true;
|
||||
}
|
||||
else if (!m_valid_id)
|
||||
{
|
||||
m_thread_id = tid;
|
||||
m_valid_id = true;
|
||||
m_count = 1;
|
||||
ret = true;
|
||||
}
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
return ret;
|
||||
}
|
||||
|
||||
bool recursive_timed_mutex::do_timedlock(const xtime& xt)
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
bool ret = false;
|
||||
pthread_t tid = pthread_self();
|
||||
if (m_valid_id && pthread_equal(m_thread_id, tid))
|
||||
{
|
||||
++m_count;
|
||||
ret = true;
|
||||
}
|
||||
else
|
||||
{
|
||||
boost::xtime t;
|
||||
// normalize, in case user has specified nsec only
|
||||
if (xt.nsec > 999999999)
|
||||
{
|
||||
t.sec = xt.nsec / 1000000000;
|
||||
t.nsec = xt.nsec % 1000000000;
|
||||
}
|
||||
else
|
||||
{
|
||||
t.sec = t.nsec = 0;
|
||||
}
|
||||
|
||||
timespec ts;
|
||||
if (xt.sec < std::numeric_limits<time_t>::max() - t.sec) // avoid overflow
|
||||
{
|
||||
ts.tv_sec = static_cast<time_t>(xt.sec + t.sec);
|
||||
ts.tv_nsec = static_cast<long>(t.nsec);
|
||||
}
|
||||
else
|
||||
{
|
||||
ts.tv_sec = std::numeric_limits<time_t>::max();
|
||||
ts.tv_nsec = 999999999; // this should not overflow, or tv_nsec is odd anyways...
|
||||
}
|
||||
// to_timespec(xt, ts);
|
||||
|
||||
while (m_valid_id)
|
||||
{
|
||||
res = pthread_cond_timedwait(&m_unlocked, &m_mutex, &ts);
|
||||
if (res == ETIMEDOUT)
|
||||
break;
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
if (!m_valid_id)
|
||||
{
|
||||
m_thread_id = tid;
|
||||
m_valid_id = true;
|
||||
m_count = 1;
|
||||
ret = true;
|
||||
}
|
||||
}
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
return ret;
|
||||
}
|
||||
|
||||
void recursive_timed_mutex::do_unlock()
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
pthread_t tid = pthread_self();
|
||||
if (m_valid_id && !pthread_equal(m_thread_id, tid))
|
||||
{
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
throw lock_error();
|
||||
}
|
||||
|
||||
if (--m_count == 0)
|
||||
{
|
||||
assert(m_valid_id);
|
||||
m_valid_id = false;
|
||||
|
||||
res = pthread_cond_signal(&m_unlocked);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void recursive_timed_mutex::do_lock(cv_state& state)
|
||||
{
|
||||
int res = 0;
|
||||
|
||||
while (m_valid_id)
|
||||
{
|
||||
res = pthread_cond_wait(&m_unlocked, &m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
m_thread_id = pthread_self();
|
||||
m_valid_id = true;
|
||||
m_count = state.count;
|
||||
|
||||
res = pthread_mutex_unlock(&m_mutex);
|
||||
assert(res == 0);
|
||||
}
|
||||
|
||||
void recursive_timed_mutex::do_unlock(cv_state& state)
|
||||
{
|
||||
int res = 0;
|
||||
res = pthread_mutex_lock(&m_mutex);
|
||||
assert(res == 0);
|
||||
|
||||
assert(m_valid_id);
|
||||
m_valid_id = false;
|
||||
|
||||
res = pthread_cond_signal(&m_unlocked);
|
||||
assert(res == 0);
|
||||
|
||||
state.pmutex = &m_mutex;
|
||||
state.count = m_count;
|
||||
m_count = 0;
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
288
src/pthread/thread.cpp
Normal file
288
src/pthread/thread.cpp
Normal file
@@ -0,0 +1,288 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
|
||||
#include <boost/thread/pthread/thread.hpp>
|
||||
|
||||
#include <boost/thread/pthread/xtime.hpp>
|
||||
#include <boost/thread/pthread/condition.hpp>
|
||||
#include <cassert>
|
||||
#include <limits>
|
||||
|
||||
namespace {
|
||||
|
||||
class thread_param
|
||||
{
|
||||
public:
|
||||
thread_param(const boost::function0<void>& threadfunc)
|
||||
: m_threadfunc(threadfunc), m_started(false)
|
||||
{
|
||||
}
|
||||
void wait()
|
||||
{
|
||||
boost::mutex::scoped_lock scoped_lock(m_mutex);
|
||||
while (!m_started)
|
||||
m_condition.wait(scoped_lock);
|
||||
}
|
||||
void started()
|
||||
{
|
||||
boost::mutex::scoped_lock scoped_lock(m_mutex);
|
||||
m_started = true;
|
||||
m_condition.notify_one();
|
||||
}
|
||||
|
||||
boost::mutex m_mutex;
|
||||
boost::condition m_condition;
|
||||
const boost::function0<void>& m_threadfunc;
|
||||
bool m_started;
|
||||
};
|
||||
|
||||
// I am not using a constant for the following, to avoid
|
||||
// the need to specify a type, which might be to small
|
||||
// to hold the value.
|
||||
#ifndef NANOSECONDS_PER_SECOND
|
||||
#define NANOSECONDS_PER_SECOND 1000000000
|
||||
#endif
|
||||
|
||||
inline void to_timespec_duration(const boost::xtime& xt, timespec& ts)
|
||||
{
|
||||
boost::xtime cur, t;
|
||||
int res = 0;
|
||||
res = boost::xtime_get(&cur, boost::TIME_UTC);
|
||||
assert(res == boost::TIME_UTC);
|
||||
|
||||
if (xt.sec < cur.sec)
|
||||
{
|
||||
ts.tv_sec = 0;
|
||||
ts.tv_nsec = 0;
|
||||
return;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (xt.nsec < cur.nsec)
|
||||
{
|
||||
if (xt.sec == cur.sec)
|
||||
{
|
||||
ts.tv_sec = 0;
|
||||
ts.tv_nsec = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
t.nsec = xt.nsec + NANOSECONDS_PER_SECOND - cur.nsec;
|
||||
t.sec = xt.sec - cur.sec + 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
t.nsec = xt.nsec - cur.nsec;
|
||||
t.sec = xt.sec - cur.sec;
|
||||
// guard against wrong user nsec spec.
|
||||
t.sec += t.nsec / NANOSECONDS_PER_SECOND;
|
||||
t.nsec %= NANOSECONDS_PER_SECOND;
|
||||
}
|
||||
|
||||
if (t.sec < std::numeric_limits<time_t>::max())
|
||||
{
|
||||
// the following casts are safe
|
||||
ts.tv_sec = static_cast<time_t>(t.sec);
|
||||
ts.tv_nsec = static_cast<long>(t.nsec);
|
||||
}
|
||||
else
|
||||
{
|
||||
// on overflow return maximum possible
|
||||
// (very unlikely case though)
|
||||
ts.tv_sec = std::numeric_limits<time_t>::max();
|
||||
ts.tv_nsec = std::numeric_limits<long>::max();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
} // unnamed namespace
|
||||
|
||||
extern "C" {
|
||||
static void* thread_proxy(void* param)
|
||||
{
|
||||
try
|
||||
{
|
||||
thread_param* p = static_cast<thread_param*>(param);
|
||||
boost::function0<void> threadfunc = p->m_threadfunc;
|
||||
p->started();
|
||||
threadfunc();
|
||||
}
|
||||
catch (...)
|
||||
{
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
namespace boost {
|
||||
|
||||
thread::thread()
|
||||
: m_joinable(false)
|
||||
{
|
||||
m_thread = pthread_self();
|
||||
}
|
||||
|
||||
thread::thread(const function0<void>& threadfunc)
|
||||
: m_joinable(true)
|
||||
{
|
||||
thread_param param(threadfunc);
|
||||
int res = 0;
|
||||
res = pthread_create(&m_thread, 0, &thread_proxy, ¶m);
|
||||
if (res != 0)
|
||||
throw thread_resource_error();
|
||||
param.wait();
|
||||
}
|
||||
|
||||
thread::~thread()
|
||||
{
|
||||
if (m_joinable)
|
||||
{
|
||||
pthread_detach(m_thread);
|
||||
}
|
||||
}
|
||||
|
||||
bool thread::operator==(const thread& other) const
|
||||
{
|
||||
return pthread_equal(m_thread, other.m_thread) != 0;
|
||||
}
|
||||
|
||||
bool thread::operator!=(const thread& other) const
|
||||
{
|
||||
return !operator==(other);
|
||||
}
|
||||
|
||||
void thread::join()
|
||||
{
|
||||
assert(m_joinable); //See race condition comment below
|
||||
int res = 0;
|
||||
res = pthread_join(m_thread, 0);
|
||||
assert(res == 0);
|
||||
// This isn't a race condition since any race that could occur would
|
||||
// have us in undefined behavior territory any way.
|
||||
m_joinable = false;
|
||||
}
|
||||
|
||||
void thread::sleep(const xtime& xt)
|
||||
{
|
||||
for (int foo=0; foo < 5; ++foo)
|
||||
{
|
||||
# if defined(BOOST_HAS_PTHREAD_DELAY_NP)
|
||||
timespec ts;
|
||||
to_timespec_duration(xt, ts);
|
||||
int res = 0;
|
||||
res = pthread_delay_np(&ts);
|
||||
assert(res == 0);
|
||||
# elif defined(BOOST_HAS_NANOSLEEP)
|
||||
timespec ts;
|
||||
to_timespec_duration(xt, ts);
|
||||
|
||||
// nanosleep takes a timespec that is an offset, not
|
||||
// an absolute time.
|
||||
nanosleep(&ts, 0);
|
||||
# else
|
||||
mutex mx;
|
||||
mutex::scoped_lock lock(mx);
|
||||
condition cond;
|
||||
cond.timed_wait(lock, xt);
|
||||
# endif
|
||||
xtime cur;
|
||||
xtime_get(&cur, TIME_UTC);
|
||||
if (xtime_cmp(xt, cur) <= 0)
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
void thread::yield()
|
||||
{
|
||||
# if defined(BOOST_HAS_SCHED_YIELD)
|
||||
int res = 0;
|
||||
res = sched_yield();
|
||||
assert(res == 0);
|
||||
# elif defined(BOOST_HAS_PTHREAD_YIELD)
|
||||
int res = 0;
|
||||
res = pthread_yield();
|
||||
assert(res == 0);
|
||||
# else
|
||||
xtime xt;
|
||||
xtime_get(&xt, TIME_UTC);
|
||||
sleep(xt);
|
||||
# endif
|
||||
}
|
||||
|
||||
thread_group::thread_group()
|
||||
{
|
||||
}
|
||||
|
||||
thread_group::~thread_group()
|
||||
{
|
||||
// We shouldn't have to scoped_lock here, since referencing this object
|
||||
// from another thread while we're deleting it in the current thread is
|
||||
// going to lead to undefined behavior any way.
|
||||
for (std::list<thread*>::iterator it = m_threads.begin();
|
||||
it != m_threads.end(); ++it)
|
||||
{
|
||||
delete (*it);
|
||||
}
|
||||
}
|
||||
|
||||
thread* thread_group::create_thread(const function0<void>& threadfunc)
|
||||
{
|
||||
// No scoped_lock required here since the only "shared data" that's
|
||||
// modified here occurs inside add_thread which does scoped_lock.
|
||||
std::auto_ptr<thread> thrd(new thread(threadfunc));
|
||||
add_thread(thrd.get());
|
||||
return thrd.release();
|
||||
}
|
||||
|
||||
void thread_group::add_thread(thread* thrd)
|
||||
{
|
||||
mutex::scoped_lock scoped_lock(m_mutex);
|
||||
|
||||
// For now we'll simply ignore requests to add a thread object multiple
|
||||
// times. Should we consider this an error and either throw or return an
|
||||
// error value?
|
||||
std::list<thread*>::iterator it = std::find(m_threads.begin(),
|
||||
m_threads.end(), thrd);
|
||||
assert(it == m_threads.end());
|
||||
if (it == m_threads.end())
|
||||
m_threads.push_back(thrd);
|
||||
}
|
||||
|
||||
void thread_group::remove_thread(thread* thrd)
|
||||
{
|
||||
mutex::scoped_lock scoped_lock(m_mutex);
|
||||
|
||||
// For now we'll simply ignore requests to remove a thread object that's
|
||||
// not in the group. Should we consider this an error and either throw or
|
||||
// return an error value?
|
||||
std::list<thread*>::iterator it = std::find(m_threads.begin(),
|
||||
m_threads.end(), thrd);
|
||||
assert(it != m_threads.end());
|
||||
if (it != m_threads.end())
|
||||
m_threads.erase(it);
|
||||
}
|
||||
|
||||
void thread_group::join_all()
|
||||
{
|
||||
mutex::scoped_lock scoped_lock(m_mutex);
|
||||
for (std::list<thread*>::iterator it = m_threads.begin();
|
||||
it != m_threads.end(); ++it)
|
||||
{
|
||||
(*it)->join();
|
||||
}
|
||||
}
|
||||
|
||||
int thread_group::size()
|
||||
{
|
||||
return m_threads.size();
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
|
||||
128
src/pthread/timeconv.inl
Normal file
128
src/pthread/timeconv.inl
Normal file
@@ -0,0 +1,128 @@
|
||||
// Copyright (C) 2001-2003
|
||||
// William E. Kempf
|
||||
//
|
||||
// Permission to use, copy, modify, distribute and sell this software
|
||||
// and its documentation for any purpose is hereby granted without fee,
|
||||
// provided that the above copyright notice appear in all copies and
|
||||
// that both that copyright notice and this permission notice appear
|
||||
// in supporting documentation. William E. Kempf makes no representations
|
||||
// about the suitability of this software for any purpose.
|
||||
// It is provided "as is" without express or implied warranty.
|
||||
|
||||
namespace {
|
||||
const int MILLISECONDS_PER_SECOND = 1000;
|
||||
const int NANOSECONDS_PER_SECOND = 1000000000;
|
||||
const int NANOSECONDS_PER_MILLISECOND = 1000000;
|
||||
|
||||
const int MICROSECONDS_PER_SECOND = 1000000;
|
||||
const int NANOSECONDS_PER_MICROSECOND = 1000;
|
||||
|
||||
inline void to_time(int milliseconds, boost::xtime& xt)
|
||||
{
|
||||
int res = 0;
|
||||
res = boost::xtime_get(&xt, boost::TIME_UTC);
|
||||
assert(res == boost::TIME_UTC);
|
||||
|
||||
xt.sec += (milliseconds / MILLISECONDS_PER_SECOND);
|
||||
xt.nsec += ((milliseconds % MILLISECONDS_PER_SECOND) *
|
||||
NANOSECONDS_PER_MILLISECOND);
|
||||
|
||||
if (xt.nsec >= NANOSECONDS_PER_SECOND)
|
||||
{
|
||||
++xt.sec;
|
||||
xt.nsec -= NANOSECONDS_PER_SECOND;
|
||||
}
|
||||
}
|
||||
|
||||
#if defined(BOOST_HAS_PTHREADS)
|
||||
inline void to_timespec(const boost::xtime& xt, timespec& ts)
|
||||
{
|
||||
ts.tv_sec = static_cast<int>(xt.sec);
|
||||
ts.tv_nsec = static_cast<int>(xt.nsec);
|
||||
if(ts.tv_nsec >= NANOSECONDS_PER_SECOND)
|
||||
{
|
||||
ts.tv_sec += ts.tv_nsec / NANOSECONDS_PER_SECOND;
|
||||
ts.tv_nsec %= NANOSECONDS_PER_SECOND;
|
||||
}
|
||||
}
|
||||
|
||||
inline void to_time(int milliseconds, timespec& ts)
|
||||
{
|
||||
boost::xtime xt;
|
||||
to_time(milliseconds, xt);
|
||||
to_timespec(xt, ts);
|
||||
}
|
||||
|
||||
inline void to_timespec_duration(const boost::xtime& xt, timespec& ts)
|
||||
{
|
||||
boost::xtime cur;
|
||||
int res = 0;
|
||||
res = boost::xtime_get(&cur, boost::TIME_UTC);
|
||||
assert(res == boost::TIME_UTC);
|
||||
|
||||
if (boost::xtime_cmp(xt, cur) <= 0)
|
||||
{
|
||||
ts.tv_sec = 0;
|
||||
ts.tv_nsec = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
ts.tv_sec = xt.sec - cur.sec;
|
||||
ts.tv_nsec = xt.nsec - cur.nsec;
|
||||
|
||||
if( ts.tv_nsec < 0 )
|
||||
{
|
||||
ts.tv_sec -= 1;
|
||||
ts.tv_nsec += NANOSECONDS_PER_SECOND;
|
||||
}
|
||||
if(ts.tv_nsec >= NANOSECONDS_PER_SECOND)
|
||||
{
|
||||
ts.tv_sec += ts.tv_nsec / NANOSECONDS_PER_SECOND;
|
||||
ts.tv_nsec %= NANOSECONDS_PER_SECOND;
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
inline void to_duration(boost::xtime xt, int& milliseconds)
|
||||
{
|
||||
boost::xtime cur;
|
||||
int res = 0;
|
||||
res = boost::xtime_get(&cur, boost::TIME_UTC);
|
||||
assert(res == boost::TIME_UTC);
|
||||
|
||||
if (boost::xtime_cmp(xt, cur) <= 0)
|
||||
milliseconds = 0;
|
||||
else
|
||||
{
|
||||
if (cur.nsec > xt.nsec)
|
||||
{
|
||||
xt.nsec += NANOSECONDS_PER_SECOND;
|
||||
--xt.sec;
|
||||
}
|
||||
milliseconds = (int)((xt.sec - cur.sec) * MILLISECONDS_PER_SECOND) +
|
||||
(((xt.nsec - cur.nsec) + (NANOSECONDS_PER_MILLISECOND/2)) /
|
||||
NANOSECONDS_PER_MILLISECOND);
|
||||
}
|
||||
}
|
||||
|
||||
inline void to_microduration(const boost::xtime& xt, int& microseconds)
|
||||
{
|
||||
boost::xtime cur;
|
||||
int res = 0;
|
||||
res = boost::xtime_get(&cur, boost::TIME_UTC);
|
||||
assert(res == boost::TIME_UTC);
|
||||
|
||||
if (boost::xtime_get(&cur, boost::TIME_UTC) <= 0)
|
||||
microseconds = 0;
|
||||
else
|
||||
{
|
||||
microseconds = (int)((xt.sec - cur.sec) * MICROSECONDS_PER_SECOND) +
|
||||
(((xt.nsec - cur.nsec) + (NANOSECONDS_PER_MICROSECOND/2)) /
|
||||
NANOSECONDS_PER_MICROSECOND);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Change Log:
|
||||
// 1 Jun 01 Initial creation.
|
||||
150
src/pthread/tss.cpp
Normal file
150
src/pthread/tss.cpp
Normal file
@@ -0,0 +1,150 @@
|
||||
// Copyright (C) 2001-2003 William E. Kempf
|
||||
// Copyright (C) 2006 Roland Schwarz
|
||||
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
|
||||
#include <boost/thread/pthread/tss.hpp>
|
||||
#ifndef BOOST_THREAD_NO_TSS_CLEANUP
|
||||
|
||||
#include <boost/thread/pthread/once.hpp>
|
||||
#include <boost/thread/pthread/mutex.hpp>
|
||||
#include <boost/thread/pthread/exceptions.hpp>
|
||||
#include <vector>
|
||||
#include <string>
|
||||
#include <stdexcept>
|
||||
#include <cassert>
|
||||
|
||||
namespace {
|
||||
|
||||
typedef std::vector<void*> tss_slots;
|
||||
|
||||
struct tss_data_t
|
||||
{
|
||||
boost::mutex mutex;
|
||||
std::vector<boost::function1<void, void*>*> cleanup_handlers;
|
||||
pthread_key_t native_key;
|
||||
};
|
||||
|
||||
tss_data_t* tss_data = 0;
|
||||
boost::once_flag tss_data_once = BOOST_ONCE_INIT;
|
||||
|
||||
extern "C" void cleanup_slots(void* p)
|
||||
{
|
||||
tss_slots* slots = static_cast<tss_slots*>(p);
|
||||
for (tss_slots::size_type i = 0; i < slots->size(); ++i)
|
||||
{
|
||||
boost::mutex::scoped_lock lock(tss_data->mutex);
|
||||
(*tss_data->cleanup_handlers[i])((*slots)[i]);
|
||||
(*slots)[i] = 0;
|
||||
}
|
||||
delete slots;
|
||||
}
|
||||
|
||||
void init_tss_data()
|
||||
{
|
||||
std::auto_ptr<tss_data_t> temp(new tss_data_t);
|
||||
|
||||
int res = pthread_key_create(&temp->native_key, &cleanup_slots);
|
||||
if (res != 0)
|
||||
return;
|
||||
|
||||
// Intentional memory "leak"
|
||||
// This is the only way to ensure the mutex in the global data
|
||||
// structure is available when cleanup handlers are run, since the
|
||||
// execution order of cleanup handlers is unspecified on any platform
|
||||
// with regards to C++ destructor ordering rules.
|
||||
tss_data = temp.release();
|
||||
}
|
||||
|
||||
tss_slots* get_slots(bool alloc)
|
||||
{
|
||||
tss_slots* slots = 0;
|
||||
|
||||
slots = static_cast<tss_slots*>(
|
||||
pthread_getspecific(tss_data->native_key));
|
||||
|
||||
if (slots == 0 && alloc)
|
||||
{
|
||||
std::auto_ptr<tss_slots> temp(new tss_slots);
|
||||
|
||||
if (pthread_setspecific(tss_data->native_key, temp.get()) != 0)
|
||||
return 0;
|
||||
|
||||
slots = temp.release();
|
||||
}
|
||||
|
||||
return slots;
|
||||
}
|
||||
|
||||
} // namespace
|
||||
|
||||
namespace boost {
|
||||
|
||||
namespace detail {
|
||||
void tss::init(boost::function1<void, void*>* pcleanup)
|
||||
{
|
||||
boost::call_once(&init_tss_data, tss_data_once);
|
||||
if (tss_data == 0)
|
||||
throw thread_resource_error();
|
||||
boost::mutex::scoped_lock lock(tss_data->mutex);
|
||||
try
|
||||
{
|
||||
tss_data->cleanup_handlers.push_back(pcleanup);
|
||||
m_slot = tss_data->cleanup_handlers.size() - 1;
|
||||
}
|
||||
catch (...)
|
||||
{
|
||||
throw thread_resource_error();
|
||||
}
|
||||
}
|
||||
|
||||
void* tss::get() const
|
||||
{
|
||||
tss_slots* slots = get_slots(false);
|
||||
|
||||
if (!slots)
|
||||
return 0;
|
||||
|
||||
if (m_slot >= slots->size())
|
||||
return 0;
|
||||
|
||||
return (*slots)[m_slot];
|
||||
}
|
||||
|
||||
void tss::set(void* value)
|
||||
{
|
||||
tss_slots* slots = get_slots(true);
|
||||
|
||||
if (!slots)
|
||||
throw boost::thread_resource_error();
|
||||
|
||||
if (m_slot >= slots->size())
|
||||
{
|
||||
try
|
||||
{
|
||||
slots->resize(m_slot + 1);
|
||||
}
|
||||
catch (...)
|
||||
{
|
||||
throw boost::thread_resource_error();
|
||||
}
|
||||
}
|
||||
|
||||
(*slots)[m_slot] = value;
|
||||
}
|
||||
|
||||
void tss::cleanup(void* value)
|
||||
{
|
||||
boost::mutex::scoped_lock lock(tss_data->mutex);
|
||||
(*tss_data->cleanup_handlers[m_slot])(value);
|
||||
}
|
||||
|
||||
} // namespace detail
|
||||
} // namespace boost
|
||||
|
||||
#endif //BOOST_THREAD_NO_TSS_CLEANUP
|
||||
48
src/pthread/xtime.cpp
Normal file
48
src/pthread/xtime.cpp
Normal file
@@ -0,0 +1,48 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#include <boost/thread/pthread/config.hpp>
|
||||
#include <boost/thread/pthread/xtime.hpp>
|
||||
|
||||
// TODO: xtime possible should be replaced by boost date time
|
||||
#if defined(BOOST_HAS_GETTIMEOFDAY)
|
||||
# include <sys/time.h>
|
||||
#elif ! defined (BOOST_HAS_CLOCK_GETTIME)
|
||||
# include <time.h>
|
||||
#endif
|
||||
|
||||
namespace boost {
|
||||
|
||||
int xtime_get(struct xtime* xtp, int clock_type)
|
||||
{
|
||||
if (clock_type == TIME_UTC)
|
||||
{
|
||||
#if defined(BOOST_HAS_GETTIMEOFDAY)
|
||||
struct timeval tv;
|
||||
gettimeofday(&tv, 0);
|
||||
xtp->sec = tv.tv_sec;
|
||||
xtp->nsec = tv.tv_usec * 1000;
|
||||
return clock_type;
|
||||
#elif defined(BOOST_HAS_CLOCK_GETTIME)
|
||||
timespec ts;
|
||||
clock_gettime(CLOCK_REALTIME, &ts);
|
||||
xtp->sec = ts.tv_sec;
|
||||
xtp->nsec = ts.tv_nsec;
|
||||
return clock_type;
|
||||
#else
|
||||
time_t t;
|
||||
time(&t);
|
||||
xtp->sec = t;
|
||||
xtp->nsec = 0;
|
||||
return clock_type;
|
||||
#endif
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
166
src/win32/exceptions.cpp
Normal file
166
src/win32/exceptions.cpp
Normal file
@@ -0,0 +1,166 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#include <boost/thread/win32/config.hpp>
|
||||
#include <boost/thread/win32/exceptions.hpp>
|
||||
#include <cstring>
|
||||
#include <string>
|
||||
|
||||
# ifdef BOOST_NO_STDC_NAMESPACE
|
||||
namespace std { using ::strerror; }
|
||||
# endif
|
||||
|
||||
#include "windows.h"
|
||||
|
||||
namespace
|
||||
{
|
||||
|
||||
std::string system_message(int sys_err_code)
|
||||
{
|
||||
std::string str;
|
||||
LPVOID lpMsgBuf;
|
||||
::FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
|
||||
FORMAT_MESSAGE_FROM_SYSTEM |
|
||||
FORMAT_MESSAGE_IGNORE_INSERTS,
|
||||
NULL,
|
||||
sys_err_code,
|
||||
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
|
||||
(LPSTR)&lpMsgBuf,
|
||||
0,
|
||||
NULL);
|
||||
str += static_cast<LPCSTR>(lpMsgBuf);
|
||||
::LocalFree(lpMsgBuf); // free the buffer
|
||||
while (str.size() && (str[str.size()-1] == '\n' ||
|
||||
str[str.size()-1] == '\r'))
|
||||
{
|
||||
str.erase(str.size()-1);
|
||||
}
|
||||
return str;
|
||||
}
|
||||
|
||||
} // unnamed namespace
|
||||
|
||||
namespace boost {
|
||||
|
||||
thread_exception::thread_exception()
|
||||
: m_sys_err(0)
|
||||
{
|
||||
}
|
||||
|
||||
thread_exception::thread_exception(int sys_err_code)
|
||||
: m_sys_err(sys_err_code)
|
||||
{
|
||||
}
|
||||
|
||||
thread_exception::~thread_exception() throw()
|
||||
{
|
||||
}
|
||||
|
||||
int thread_exception::native_error() const
|
||||
{
|
||||
return m_sys_err;
|
||||
}
|
||||
|
||||
const char* thread_exception::message() const
|
||||
{
|
||||
if (m_sys_err != 0)
|
||||
return system_message(m_sys_err).c_str();
|
||||
return what();
|
||||
}
|
||||
|
||||
lock_error::lock_error()
|
||||
{
|
||||
}
|
||||
|
||||
lock_error::lock_error(int sys_err_code)
|
||||
: thread_exception(sys_err_code)
|
||||
{
|
||||
}
|
||||
|
||||
lock_error::~lock_error() throw()
|
||||
{
|
||||
}
|
||||
|
||||
const char* lock_error::what() const throw()
|
||||
{
|
||||
return "boost::lock_error";
|
||||
}
|
||||
|
||||
thread_resource_error::thread_resource_error()
|
||||
{
|
||||
}
|
||||
|
||||
thread_resource_error::thread_resource_error(int sys_err_code)
|
||||
: thread_exception(sys_err_code)
|
||||
{
|
||||
}
|
||||
|
||||
thread_resource_error::~thread_resource_error() throw()
|
||||
{
|
||||
}
|
||||
|
||||
const char* thread_resource_error::what() const throw()
|
||||
{
|
||||
return "boost::thread_resource_error";
|
||||
}
|
||||
|
||||
unsupported_thread_option::unsupported_thread_option()
|
||||
{
|
||||
}
|
||||
|
||||
unsupported_thread_option::unsupported_thread_option(int sys_err_code)
|
||||
: thread_exception(sys_err_code)
|
||||
{
|
||||
}
|
||||
|
||||
unsupported_thread_option::~unsupported_thread_option() throw()
|
||||
{
|
||||
}
|
||||
|
||||
const char* unsupported_thread_option::what() const throw()
|
||||
{
|
||||
return "boost::unsupported_thread_option";
|
||||
}
|
||||
|
||||
invalid_thread_argument::invalid_thread_argument()
|
||||
{
|
||||
}
|
||||
|
||||
invalid_thread_argument::invalid_thread_argument(int sys_err_code)
|
||||
: thread_exception(sys_err_code)
|
||||
{
|
||||
}
|
||||
|
||||
invalid_thread_argument::~invalid_thread_argument() throw()
|
||||
{
|
||||
}
|
||||
|
||||
const char* invalid_thread_argument::what() const throw()
|
||||
{
|
||||
return "boost::invalid_thread_argument";
|
||||
}
|
||||
|
||||
thread_permission_error::thread_permission_error()
|
||||
{
|
||||
}
|
||||
|
||||
thread_permission_error::thread_permission_error(int sys_err_code)
|
||||
: thread_exception(sys_err_code)
|
||||
{
|
||||
}
|
||||
|
||||
thread_permission_error::~thread_permission_error() throw()
|
||||
{
|
||||
}
|
||||
|
||||
const char* thread_permission_error::what() const throw()
|
||||
{
|
||||
return "boost::thread_permission_error";
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
247
src/win32/thread.cpp
Normal file
247
src/win32/thread.cpp
Normal file
@@ -0,0 +1,247 @@
|
||||
// Copyright 2006 Roland Schwarz.
|
||||
// Distributed under the Boost Software License, Version 1.0. (See
|
||||
// accompanying file LICENSE_1_0.txt or copy at
|
||||
// http://www.boost.org/LICENSE_1_0.txt)
|
||||
//
|
||||
// This work is a reimplementation along the design and ideas
|
||||
// of William E. Kempf.
|
||||
|
||||
#include <boost/thread/win32/config.hpp>
|
||||
|
||||
#include <boost/thread/win32/thread.hpp>
|
||||
#include <boost/thread/win32/xtime.hpp>
|
||||
#include <boost/thread/win32/condition.hpp>
|
||||
#include <cassert>
|
||||
|
||||
|
||||
#include <windows.h>
|
||||
#if !defined(BOOST_NO_THREADEX)
|
||||
# include <process.h>
|
||||
#endif
|
||||
|
||||
#include "timeconv.inl"
|
||||
|
||||
//#include "boost/thread/win32/tss_hooks.hpp"
|
||||
|
||||
namespace {
|
||||
|
||||
#if defined(BOOST_NO_THREADEX)
|
||||
// Windows CE doesn't define _beginthreadex
|
||||
|
||||
struct ThreadProxyData
|
||||
{
|
||||
typedef unsigned (__stdcall* func)(void*);
|
||||
func start_address_;
|
||||
void* arglist_;
|
||||
ThreadProxyData(func start_address,void* arglist) : start_address_(start_address), arglist_(arglist) {}
|
||||
};
|
||||
|
||||
DWORD WINAPI ThreadProxy(LPVOID args)
|
||||
{
|
||||
ThreadProxyData* data=reinterpret_cast<ThreadProxyData*>(args);
|
||||
DWORD ret=data->start_address_(data->arglist_);
|
||||
delete data;
|
||||
return ret;
|
||||
}
|
||||
|
||||
inline unsigned _beginthreadex(void* security, unsigned stack_size, unsigned (__stdcall* start_address)(void*),
|
||||
void* arglist, unsigned initflag,unsigned* thrdaddr)
|
||||
{
|
||||
DWORD threadID;
|
||||
HANDLE hthread=CreateThread(static_cast<LPSECURITY_ATTRIBUTES>(security),stack_size,ThreadProxy,
|
||||
new ThreadProxyData(start_address,arglist),initflag,&threadID);
|
||||
if (hthread!=0)
|
||||
*thrdaddr=threadID;
|
||||
return reinterpret_cast<unsigned>(hthread);
|
||||
}
|
||||
#endif
|
||||
|
||||
class thread_param
|
||||
{
|
||||
public:
|
||||
thread_param(const boost::function0<void>& threadfunc)
|
||||
: m_threadfunc(threadfunc), m_started(false)
|
||||
{
|
||||
}
|
||||
void wait()
|
||||
{
|
||||
boost::mutex::scoped_lock scoped_lock(m_mutex);
|
||||
while (!m_started)
|
||||
m_condition.wait(scoped_lock);
|
||||
}
|
||||
void started()
|
||||
{
|
||||
boost::mutex::scoped_lock scoped_lock(m_mutex);
|
||||
m_started = true;
|
||||
m_condition.notify_one();
|
||||
}
|
||||
|
||||
boost::mutex m_mutex;
|
||||
boost::condition m_condition;
|
||||
const boost::function0<void>& m_threadfunc;
|
||||
bool m_started;
|
||||
};
|
||||
|
||||
} // unnamed namespace
|
||||
|
||||
extern "C" {
|
||||
unsigned __stdcall thread_proxy(void* param)
|
||||
{
|
||||
try
|
||||
{
|
||||
thread_param* p = static_cast<thread_param*>(param);
|
||||
boost::function0<void> threadfunc = p->m_threadfunc;
|
||||
p->started();
|
||||
threadfunc();
|
||||
// on_thread_exit();
|
||||
}
|
||||
catch (...)
|
||||
{
|
||||
// on_thread_exit();
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
namespace boost {
|
||||
|
||||
thread::thread()
|
||||
: m_joinable(false)
|
||||
{
|
||||
m_thread = reinterpret_cast<void*>(GetCurrentThread());
|
||||
m_id = GetCurrentThreadId();
|
||||
}
|
||||
|
||||
thread::thread(const function0<void>& threadfunc)
|
||||
: m_joinable(true)
|
||||
{
|
||||
thread_param param(threadfunc);
|
||||
m_thread = reinterpret_cast<void*>(_beginthreadex(0, 0, &thread_proxy,
|
||||
¶m, 0, &m_id));
|
||||
if (!m_thread)
|
||||
throw thread_resource_error();
|
||||
param.wait();
|
||||
}
|
||||
|
||||
thread::~thread()
|
||||
{
|
||||
if (m_joinable)
|
||||
{
|
||||
int res = 0;
|
||||
res = CloseHandle(reinterpret_cast<HANDLE>(m_thread));
|
||||
assert(res);
|
||||
}
|
||||
}
|
||||
|
||||
bool thread::operator==(const thread& other) const
|
||||
{
|
||||
return other.m_id == m_id;
|
||||
}
|
||||
|
||||
bool thread::operator!=(const thread& other) const
|
||||
{
|
||||
return !operator==(other);
|
||||
}
|
||||
|
||||
void thread::join()
|
||||
{
|
||||
assert(m_joinable); //See race condition comment below
|
||||
int res = 0;
|
||||
res = WaitForSingleObject(reinterpret_cast<HANDLE>(m_thread), INFINITE);
|
||||
assert(res == WAIT_OBJECT_0);
|
||||
res = CloseHandle(reinterpret_cast<HANDLE>(m_thread));
|
||||
assert(res);
|
||||
// This isn't a race condition since any race that could occur would
|
||||
// have us in undefined behavior territory any way.
|
||||
m_joinable = false;
|
||||
}
|
||||
|
||||
void thread::sleep(const xtime& xt)
|
||||
{
|
||||
for (int foo=0; foo < 5; ++foo)
|
||||
{
|
||||
int milliseconds;
|
||||
to_duration(xt, milliseconds);
|
||||
Sleep(milliseconds);
|
||||
xtime cur;
|
||||
xtime_get(&cur, TIME_UTC);
|
||||
if (xtime_cmp(xt, cur) <= 0)
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
void thread::yield()
|
||||
{
|
||||
Sleep(0);
|
||||
}
|
||||
|
||||
thread_group::thread_group()
|
||||
{
|
||||
}
|
||||
|
||||
thread_group::~thread_group()
|
||||
{
|
||||
// We shouldn't have to scoped_lock here, since referencing this object
|
||||
// from another thread while we're deleting it in the current thread is
|
||||
// going to lead to undefined behavior any way.
|
||||
for (std::list<thread*>::iterator it = m_threads.begin();
|
||||
it != m_threads.end(); ++it)
|
||||
{
|
||||
delete (*it);
|
||||
}
|
||||
}
|
||||
|
||||
thread* thread_group::create_thread(const function0<void>& threadfunc)
|
||||
{
|
||||
// No scoped_lock required here since the only "shared data" that's
|
||||
// modified here occurs inside add_thread which does scoped_lock.
|
||||
std::auto_ptr<thread> thrd(new thread(threadfunc));
|
||||
add_thread(thrd.get());
|
||||
return thrd.release();
|
||||
}
|
||||
|
||||
void thread_group::add_thread(thread* thrd)
|
||||
{
|
||||
mutex::scoped_lock scoped_lock(m_mutex);
|
||||
|
||||
// For now we'll simply ignore requests to add a thread object multiple
|
||||
// times. Should we consider this an error and either throw or return an
|
||||
// error value?
|
||||
std::list<thread*>::iterator it = std::find(m_threads.begin(),
|
||||
m_threads.end(), thrd);
|
||||
assert(it == m_threads.end());
|
||||
if (it == m_threads.end())
|
||||
m_threads.push_back(thrd);
|
||||
}
|
||||
|
||||
void thread_group::remove_thread(thread* thrd)
|
||||
{
|
||||
mutex::scoped_lock scoped_lock(m_mutex);
|
||||
|
||||
// For now we'll simply ignore requests to remove a thread object that's
|
||||
// not in the group. Should we consider this an error and either throw or
|
||||
// return an error value?
|
||||
std::list<thread*>::iterator it = std::find(m_threads.begin(),
|
||||
m_threads.end(), thrd);
|
||||
assert(it != m_threads.end());
|
||||
if (it != m_threads.end())
|
||||
m_threads.erase(it);
|
||||
}
|
||||
|
||||
void thread_group::join_all()
|
||||
{
|
||||
mutex::scoped_lock scoped_lock(m_mutex);
|
||||
for (std::list<thread*>::iterator it = m_threads.begin();
|
||||
it != m_threads.end(); ++it)
|
||||
{
|
||||
(*it)->join();
|
||||
}
|
||||
}
|
||||
|
||||
int thread_group::size()
|
||||
{
|
||||
return m_threads.size();
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
Some files were not shown because too many files have changed in this diff Show More
Reference in New Issue
Block a user