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- // Copyright (C) 2012-2013 Vicente Botet
- //
- // 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)
- // <boost/thread/future.hpp>
- // class future<R>
- // template<typename F>
- // auto then(F&& func) -> future<decltype(func(*this))>;
- #define BOOST_THREAD_VERSION 4
- //#define BOOST_THREAD_USES_LOG
- #define BOOST_THREAD_USES_LOG_THREAD_ID
- #include <boost/thread/detail/log.hpp>
- #include <boost/thread/future.hpp>
- #include <boost/detail/lightweight_test.hpp>
- #if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
- int p1()
- {
- BOOST_THREAD_LOG << "p1 < " << BOOST_THREAD_END_LOG;
- boost::this_thread::sleep_for(boost::chrono::milliseconds(500));
- BOOST_THREAD_LOG << "p1 >" << BOOST_THREAD_END_LOG;
- return 1;
- }
- int p2(boost::future<int> f)
- {
- BOOST_THREAD_LOG << "p2 <" << &f << BOOST_THREAD_END_LOG;
- BOOST_TEST(f.valid());
- int i = f.get();
- boost::this_thread::sleep_for(boost::chrono::milliseconds(500));
- BOOST_THREAD_LOG << "p2 <" << &f << BOOST_THREAD_END_LOG;
- return 2 * i;
- }
- void p3(boost::future<int> f)
- {
- BOOST_THREAD_LOG << "p3 <" << &f << BOOST_THREAD_END_LOG;
- BOOST_TEST(f.valid());
- int i = f.get();
- boost::this_thread::sleep_for(boost::chrono::milliseconds(500));
- BOOST_THREAD_LOG << "p3 <" << &f << " " <<i << BOOST_THREAD_END_LOG;
- return;
- }
- int main()
- {
- BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
- {
- try
- {
- boost::future<int> f1 = boost::async(boost::launch::deferred, &p1);
- BOOST_TEST(f1.valid());
- {
- boost::future<int> f2 = f1.then(&p2);
- BOOST_TEST(f2.valid());
- }
- BOOST_TEST(! f1.valid());
- }
- catch (std::exception& ex)
- {
- BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG;
- BOOST_TEST(false);
- }
- catch (...)
- {
- BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG;
- BOOST_TEST(false);
- }
- }
- BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
- {
- boost::future<int> f1 = boost::async(boost::launch::deferred, &p1);
- BOOST_TEST(f1.valid());
- boost::future<int> f2 = f1.then(&p2);
- BOOST_TEST(f2.valid());
- BOOST_TEST(! f1.valid());
- try
- {
- BOOST_TEST(f2.get()==2);
- }
- catch (std::exception& ex)
- {
- BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG;
- BOOST_TEST(false);
- }
- catch (...)
- {
- BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG;
- BOOST_TEST(false);
- }
- }
- BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
- {
- boost::future<int> f1 = boost::async(boost::launch::deferred, &p1);
- BOOST_TEST(f1.valid());
- boost::future<void> f2 = f1.then(&p3);
- BOOST_TEST(f2.valid());
- try
- {
- f2.wait();
- }
- catch (std::exception& ex)
- {
- BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG;
- BOOST_TEST(false);
- }
- catch (...)
- {
- BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG;
- BOOST_TEST(false);
- }
- }
- BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
- {
- boost::future<int> f2 = boost::async(boost::launch::deferred, p1).then(&p2);
- BOOST_TEST(f2.get()==2);
- }
- BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
- {
- boost::future<int> f1 = boost::async(boost::launch::deferred, p1);
- boost::future<int> f21 = f1.then(&p2);
- boost::future<int> f2= f21.then(&p2);
- BOOST_TEST(f2.get()==4);
- }
- BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
- {
- boost::future<int> f1 = boost::async(boost::launch::deferred, p1);
- boost::future<int> f2= f1.then(&p2).then(&p2);
- BOOST_TEST(f2.get()==4);
- }
- BOOST_THREAD_LOG << BOOST_THREAD_END_LOG;
- {
- boost::future<int> f2 = boost::async(boost::launch::deferred, p1).then(&p2).then(&p2);
- BOOST_TEST(f2.get()==4);
- }
- return boost::report_errors();
- }
- #else
- int main()
- {
- return 0;
- }
- #endif
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