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546362b425
for returning a C++11 std::future from an asynchronous operation's
initiating function.
To use asio::use_future, pass it to an asynchronous operation instead of
a normal completion handler. For example:
std::future<std::size_t> length =
my_socket.async_read_some(my_buffer, asio::use_future);
Where a completion handler signature has the form:
void handler(error_code ec, result_type result);
the initiating function returns a std::future templated on result_type.
In the above example, this is std::size_t. If the asynchronous operation
fails, the error_code is converted into a system_error exception and
passed back to the caller through the future.
Where a completion handler signature has the form:
void handler(error_code ec);
the initiating function returns std::future<void>. As above, an error
is passed back in the future as a system_error exception.
[SVN r84313]
39 lines
854 B
Plaintext
39 lines
854 B
Plaintext
#
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# Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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#
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# Distributed under the Boost Software License, Version 1.0. (See accompanying
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# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#
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import os ;
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if [ os.name ] = SOLARIS
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{
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lib socket ;
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lib nsl ;
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}
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else if [ os.name ] = NT
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{
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lib ws2_32 ;
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lib mswsock ;
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}
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else if [ os.name ] = HPUX
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{
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lib ipv6 ;
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}
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exe server
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: daytime_client.cpp
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/boost/system//boost_system
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: <define>BOOST_ALL_NO_LIB=1
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<threading>multi
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<os>SOLARIS:<library>socket
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<os>SOLARIS:<library>nsl
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<os>NT:<define>_WIN32_WINNT=0x0501
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<os>NT,<toolset>gcc:<library>ws2_32
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<os>NT,<toolset>gcc:<library>mswsock
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<os>NT,<toolset>gcc-cygwin:<define>__USE_W32_SOCKETS
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<os>HPUX,<toolset>gcc:<define>_XOPEN_SOURCE_EXTENDED
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<os>HPUX:<library>ipv6
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;
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