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fix minimum/default stacksize for POSIX

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This commit is contained in:
Oliver Kowalke
2017-06-15 18:06:11 +02:00
parent ae8f6547b8
commit e038a7402c
3 changed files with 42 additions and 12 deletions
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4
example/Jamfile.v2
View File

@@ -26,6 +26,10 @@ project boost/context/example
<threading>multi
;
exe stack
: stack.cpp
;
exe jump_void
: jump_void.cpp
;

25
example/stack.cpp Normal file
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@@ -0,0 +1,25 @@
// Copyright Oliver Kowalke 2016.
// 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 <cstdlib>
#include <iostream>
#include <boost/context/continuation.hpp>
namespace ctx = boost::context;
int main() {
std::cout << "minimum stack size: " << ctx::stack_traits::minimum_size() << " byte\n";
std::cout << "default stack size: " << ctx::stack_traits::default_size() << " byte\n";
std::cout << "maximum stack size: ";
if ( ctx::stack_traits::is_unbounded() ) {
std::cout << "unlimited\n";
} else {
std::cout << ctx::stack_traits::maximum_size() << " byte\n";
}
std::cout << "main: done" << std::endl;
return EXIT_SUCCESS;
}

25
src/posix/stack_traits.cpp
View File

@@ -27,10 +27,15 @@ extern "C" {
#endif
#if !defined (SIGSTKSZ)
# define SIGSTKSZ (8 * 1024)
# define SIGSTKSZ (32768) // 32kb minimum allowable stack
# define UDEF_SIGSTKSZ
#endif
#if !defined (MINSIGSTKSZ)
# define MINSIGSTKSZ (131072) // 128kb recommended stack size
# define UDEF_MINSIGSTKSZ
#endif
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
@@ -88,20 +93,12 @@ stack_traits::page_size() BOOST_NOEXCEPT_OR_NOTHROW {
std::size_t
stack_traits::default_size() BOOST_NOEXCEPT_OR_NOTHROW {
const std::size_t size = 64 * 1024;
if ( is_unbounded() ) {
return size;
}
BOOST_ASSERT( maximum_size() >= minimum_size() );
return maximum_size() == size
? size
: (std::min)( size, maximum_size() );
return SIGSTKSZ;
}
std::size_t
stack_traits::minimum_size() BOOST_NOEXCEPT_OR_NOTHROW {
return SIGSTKSZ;
return MINSIGSTKSZ;
}
std::size_t
@@ -117,5 +114,9 @@ stack_traits::maximum_size() BOOST_NOEXCEPT_OR_NOTHROW {
#endif
#ifdef UDEF_SIGSTKSZ
# undef SIGSTKSZ
# undef SIGSTKSZ;
#endif
#ifdef UDEF_MINSIGSTKSZ
# undef MINSIGSTKSZ
#endif