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