62 lines
1.3 KiB
C++
62 lines
1.3 KiB
C++
// Copyright (C) 2013 Vicente Botet
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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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#define BOOST_THREAD_VERSION 4
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#include <iostream>
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#include <functional>
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//#include <future>
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#include <boost/thread.hpp>
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#include <boost/shared_ptr.hpp>
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int f()
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{
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return 42;
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}
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boost::packaged_task<int()>* schedule(boost::function<int ()> const& fn)
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{
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// Normally, the pointer to the packaged task is stored in a queue
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// for execution on a separate thread, and the schedule function
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// would return just a future<T>
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boost::function<int ()> copy(fn);
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boost::packaged_task<int()>* result = new boost::packaged_task<int()>(copy);
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return result;
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}
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struct MyFunc
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{
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MyFunc(MyFunc const&) = delete;
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MyFunc& operator=(MyFunc const&) = delete;
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MyFunc() {};
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MyFunc(MyFunc &&) {};
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MyFunc& operator=(MyFunc &&) { return *this;};
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void operator()()const {}
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};
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int main()
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{
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boost::packaged_task<int()>* p(schedule(f));
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(*p)();
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boost::future<int> fut = p->get_future();
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std::cout << "The answer to the ultimate question: " << fut.get() << std::endl;
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{
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boost::function<void()> f;
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MyFunc mf;
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boost::packaged_task<void()> t1(f);
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boost::packaged_task<void()> t2(boost::move(mf));
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}
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return 0;
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}
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