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92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
// Copyright (C) 2011 Vicente J. Botet Escriba
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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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// <boost/thread/future.hpp>
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// class future<R>
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// template<typename F>
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// auto then(F&& func) -> future<decltype(func(*this))>;
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#define BOOST_THREAD_VERSION 4
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#define BOOST_THREAD_DONT_PROVIDE_FUTURE_INVALID_AFTER_GET
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//#define BOOST_THREAD_USES_LOG
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#define BOOST_THREAD_USES_LOG_THREAD_ID
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#include <boost/thread/detail/log.hpp>
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#include <boost/thread/future.hpp>
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#include <boost/detail/lightweight_test.hpp>
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#if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION
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int p1()
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{
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return 1;
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}
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int p2(boost::future<int>& f)
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{
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return 2 * f.get();
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}
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int main()
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{
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BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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boost::future<int> f1 = boost::async(boost::launch::async, p1);
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BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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boost::future<int> f2 = f1.then(p2);
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BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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try
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{
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BOOST_TEST(f2.get()==2);
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BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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}
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catch (std::exception& ex)
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{
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BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG;
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BOOST_ASSERT(false);
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}
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catch (...)
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{
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BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG;
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BOOST_ASSERT(false);
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}
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BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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// {
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// BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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// boost::future<int> f2 = boost::async(p1).then(p2);
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// BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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// BOOST_TEST(f2.get()==2);
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// BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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// }
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// {
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// BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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// boost::future<int> f1 = boost::async(p1);
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// BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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// boost::future<int> f2 = f1.then(p2).then(p2);
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// BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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// BOOST_TEST(f2.get()==4);
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// BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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// }
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// {
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// BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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// boost::future<int> f2 = boost::async(p1).then(p2).then(p2);
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// BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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// BOOST_TEST(f2.get()==4);
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// BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
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// }
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return boost::report_errors();
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}
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#else
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int main()
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{
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return 0;
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}
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#endif
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