// 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) #include <boost/config.hpp> #if ! defined BOOST_NO_CXX11_DECLTYPE #define BOOST_RESULT_OF_USE_DECLTYPE #endif #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/assert.hpp> #include <string> #include <iostream> #if defined BOOST_THREAD_PROVIDES_FUTURE_UNWRAP #ifdef BOOST_MSVC #pragma warning(disable: 4127) // conditional expression is constant #endif int p1() { BOOST_THREAD_LOG << "P1" << BOOST_THREAD_END_LOG; return 123; } boost::future<int> p2() { BOOST_THREAD_LOG << "<P2" << BOOST_THREAD_END_LOG; boost::future<int> f1 = boost::async(boost::launch::async, &p1); BOOST_THREAD_LOG << "P2>" << BOOST_THREAD_END_LOG; return boost::move(f1); } int main() { const int number_of_tests = 100; BOOST_THREAD_LOG << "<MAIN" << BOOST_THREAD_END_LOG; for (int i=0; i< number_of_tests; i++) try { #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES { boost::future<int> inner_future = boost::async(boost::launch::async, &p2).unwrap(); inner_future.wait(); int ii = inner_future.get(); BOOST_THREAD_LOG << "ii= "<< ii << "" << BOOST_THREAD_END_LOG; } #endif { boost::future<boost::future<int> > outer_future = boost::async(boost::launch::async, &p2); boost::future<int> inner_future = outer_future.unwrap(); inner_future.wait(); int ii = inner_future.get(); BOOST_THREAD_LOG << "ii= "<< ii << "" << BOOST_THREAD_END_LOG; } { boost::future<boost::future<int> > outer_future = boost::async(boost::launch::async, &p2); boost::future<int> inner_future = outer_future.unwrap(); int ii = inner_future.get(); BOOST_THREAD_LOG << "ii= "<< ii << "" << BOOST_THREAD_END_LOG; } } catch (std::exception& ex) { std::cout << "ERRORRRRR "<<ex.what() << "" << std::endl; BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG; return 1; } catch (...) { std::cout << " ERRORRRRR exception thrown" << std::endl; BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG; return 2; } BOOST_THREAD_LOG << "MAIN>" << BOOST_THREAD_END_LOG; return 0; } #else int main() { return 0; } #endif