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make_future.cpp
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154 lines (141 loc) · 4.11 KB
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// Copyright (C) 2012 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
#include <boost/thread/future.hpp>
#include <iostream>
namespace boost
{
template <typename T>
exception_ptr make_exception_ptr(T v)
{
return copy_exception(v);
}
}
int p1() { return 5; }
int& p1r() { static int i=0; return i; }
void p() { }
#if defined BOOST_THREAD_USES_MOVE
boost::future<void> void_compute()
{
return BOOST_THREAD_MAKE_RV_REF(boost::make_ready_future());
}
#endif
boost::future<int> compute(int x)
{
if (x == 0) return boost::make_ready_future(0);
#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
if (x < 0) return boost::make_exceptional_future<int>(std::logic_error("Error"));
#else
if (x < 0) return boost::make_exceptional(std::logic_error("Error"));
#endif
//boost::future<int> f1 = boost::async([]() { return x+1; });
boost::future<int> f1 = boost::async(p1);
return boost::move(f1);
}
boost::future<int&> compute_ref(int x)
{
static int i = 0;
//if (x == 0) return boost::make_ready_future<int&>(i); //This must not compile as the type is deduced as boost::future<int>
if (x == 0) return boost::make_ready_no_decay_future<int&>(i);
#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
if (x < 0) return boost::make_exceptional_future<int&>(std::logic_error("Error"));
#else
if (x < 0) return boost::make_exceptional(std::logic_error("Error"));
#endif
boost::future<int&> f1 = boost::async(p1r);
return boost::move(f1);
}
boost::shared_future<int> shared_compute(int x)
{
if (x == 0) return boost::make_ready_future(0).share();
#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
if (x < 0) return boost::make_exceptional_future<int>(std::logic_error("Error")).share();
#else
if (x < 0) return boost::make_exceptional(std::logic_error("Error"));
#endif
//boost::future<int> f1 = boost::async([]() { return x+1; });
boost::shared_future<int> f1 = boost::async(&p1).share();
return f1;
}
int main()
{
const int number_of_tests = 100;
for (int i=0; i< number_of_tests; i++)
try
{
// {
// std::cout << __FILE__ << " "<<__LINE__ << std::endl;
// boost::future<int> f = boost::async(boost::launch::async, p1);
// std::cout << i << " "<<f.get() << std::endl;
// }
#if defined BOOST_THREAD_USES_MOVE
{
std::cout << __FILE__ << " "<< __LINE__ << std::endl;
boost::future<void> f = void_compute();
f.get();
}
#endif
{
std::cout << __FILE__ << " "<< __LINE__ << std::endl;
boost::future<int> f = compute(-1);
f.wait();
}
{
std::cout << __FILE__ << " "<< __LINE__ << std::endl;
boost::future<int> f = compute(0);
std::cout << f.get() << std::endl;
}
{
std::cout << __FILE__ << " "<< __LINE__ << std::endl;
boost::future<int&> f = compute_ref(0);
std::cout << f.get() << std::endl;
}
#if __cplusplus > 201103L
{
std::cout << __FILE__ << " "<< __LINE__ << std::endl;
int i = 0;
boost::future<int&> f = boost::make_ready_future(std::ref(i));
std::cout << f.get() << std::endl;
}
#endif
{
std::cout << __FILE__ << " "<< __LINE__ << std::endl;
int i = 0;
boost::future<int&> f = boost::make_ready_future(boost::ref(i));
std::cout << f.get() << std::endl;
}
{
std::cout << __FILE__ << " "<< __LINE__ << std::endl;
const int i = 0;
boost::future<int const&> f = boost::make_ready_future(boost::cref(i));
std::cout << f.get() << std::endl;
}
{
std::cout << __FILE__ << " "<< __LINE__ << std::endl;
boost::future<int> f = compute(2);
std::cout << f.get() << std::endl;
}
{
std::cout << __FILE__ << " "<< __LINE__ << std::endl;
boost::shared_future<int> f = shared_compute(0);
std::cout << f.get() << std::endl;
}
}
catch (std::exception& ex)
{
std::cout << "ERRORRRRR "<<ex.what() << "" << std::endl;
return 1;
}
catch (...)
{
std::cout << "ERRORRRRR "<<"ERRORRRRR exception thrown" << std::endl;
return 2;
}
return 0;
}