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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
#define BOOST_THREAD_PROVIDES_EXECUTORS
#include <boost/thread/experimental/task_region.hpp>
#include <iostream>
#if ! defined BOOST_NO_CXX11_RANGE_BASED_FOR && ! defined BOOST_NO_CXX11_LAMBDAS
int fib_task_region(int n)
{
using boost::experimental::parallel::task_region;
using boost::experimental::parallel::task_region_handle;
if (n == 0) return 0;
if (n == 1) return 1;
int n1;
int n2;
task_region([&](task_region_handle& trh)
{
trh.run([&]
{
n1 = fib_task_region(n - 1);
});
n2 = fib_task_region(n - 2);
});
return n1 + n2;
}
#if defined BOOST_THREAD_PROVIDES_EXECUTORS
template <class Ex>
int fib_task_region_gen( Ex& ex, int n)
{
using boost::experimental::parallel::task_region;
using boost::experimental::parallel::task_region_handle_gen;
if (n == 0) return 0;
if (n == 1) return 1;
int n1;
int n2;
task_region(ex, [&](task_region_handle_gen<Ex>& trh)
{
trh.run([&]
{
n1 = fib_task_region(n - 1);
});
n2 = fib_task_region(n - 2);
});
return n1 + n2;
}
#endif
int main()
{
for (int i = 0; i<10; ++i) {
std::cout << fib_task_region(i) << " ";
}
std::cout << std::endl;
#if defined BOOST_THREAD_PROVIDES_EXECUTORS
boost::basic_thread_pool tp;
for (int i = 0; i<10; ++i) {
std::cout << fib_task_region_gen(tp,i) << " ";
}
std::cout << std::endl;
#endif
return 0;
}
#else
int main()
{
return 0;
}
#endif
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