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// Copyright Oliver Kowalke 2013.
// 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 <cstdlib>
#include <functional>
#include <iostream>
#include <stdexcept>
#include <boost/assert.hpp>
#include <boost/fiber/all.hpp>
int value1 = 0;
int value2 = 0;
inline
void fn1( boost::fibers::barrier & b)
{
boost::fibers::fiber::id id = boost::this_fiber::get_id();
std::cout << "fiber " << id << ": fn1 entered" << std::endl;
++value1;
std::cout << "fiber " << id << ": incremented value1: " << value1 << std::endl;
boost::this_fiber::yield();
std::cout << "fiber " << id << ": waits for barrier" << std::endl;
b.wait();
std::cout << "fiber " << id << ": passed barrier" << std::endl;
++value1;
std::cout << "fiber " << id << ": incremented value1: " << value1 << std::endl;
boost::this_fiber::yield();
++value1;
std::cout << "fiber " << id << ": incremented value1: " << value1 << std::endl;
boost::this_fiber::yield();
++value1;
std::cout << "fiber " << id << ": incremented value1: " << value1 << std::endl;
boost::this_fiber::yield();
std::cout << "fiber " << id << ": fn1 returns" << std::endl;
}
inline
void fn2( boost::fibers::barrier & b)
{
boost::fibers::fiber::id id = boost::this_fiber::get_id();
std::cout << "fiber " << id << ": fn2 entered" << std::endl;
++value2;
std::cout << "fiber " << id << ": incremented value2: " << value2 << std::endl;
boost::this_fiber::yield();
++value2;
std::cout << "fiber " << id << ": incremented value2: " << value2 << std::endl;
boost::this_fiber::yield();
++value2;
std::cout << "fiber " << id << ": incremented value2: " << value2 << std::endl;
boost::this_fiber::yield();
std::cout << "fiber " << id << ": waits for barrier" << std::endl;
b.wait();
std::cout << "fiber " << id << ": passed barrier" << std::endl;
++value2;
std::cout << "fiber " << id << ": incremented value2: " << value2 << std::endl;
boost::this_fiber::yield();
std::cout << "fiber " << id << ": fn2 returns" << std::endl;
}
int main()
{
try
{
boost::fibers::barrier fb( 2);
boost::fibers::fiber f1( & fn1, std::ref( fb) );
boost::fibers::fiber f2( & fn2, std::ref( fb) );
f1.join();
f2.join();
std::cout << "done." << std::endl;
return EXIT_SUCCESS;
}
catch ( std::exception const& e)
{ std::cerr << "exception: " << e.what() << std::endl; }
catch (...)
{ std::cerr << "unhandled exception" << std::endl; }
return EXIT_FAILURE;
}
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