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- // Copyright (C) 2014 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)
- #define BOOST_THREAD_VERSION 4
- #include <boost/config.hpp>
- #if ! defined BOOST_NO_CXX11_DECLTYPE
- #define BOOST_RESULT_OF_USE_DECLTYPE
- #endif
- #include <boost/thread/future.hpp>
- #include <boost/thread/thread.hpp>
- #include <thread>
- int main()
- {
- {
- boost::promise<int> promise;
- boost::future<int> future = promise.get_future();
- boost::future<int> result =
- future.then
- (
- boost::launch::deferred,
- [](boost::future<int> && f)
- {
- std::cout << std::this_thread::get_id() << ": callback" << std::endl;
- std::cout << "The value is: " << f.get() << std::endl;
- return f.get();
- }
- );
- // We could not reach here.
- std::cout << std::this_thread::get_id() << ": function" << std::endl;
- promise.set_value(0);
- }
- {
- boost::promise<int> promise;
- boost::shared_future<int> future = promise.get_future().share();
- boost::future<int> result =
- future.then
- (
- boost::launch::deferred,
- [](boost::shared_future<int> && f)
- {
- std::cout << std::this_thread::get_id() << ": callback" << std::endl;
- std::cout << "The value is: " << f.get() << std::endl;
- return f.get();
- }
- );
- // We could not reach here.
- std::cout << std::this_thread::get_id() << ": function" << std::endl;
- promise.set_value(0);
- }
- return 0;
- }
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