#include <cstdlib>
#include <iostream>
#include <stdexcept>
#include <string>

#include <boost/fiber/all.hpp>

typedef boost::fibers::buffered_channel< std::string >	channel_t;

inline
void foo( channel_t & chan1, channel_t & chan2, std::string const& msg)
{
    boost::fibers::fiber::id id( boost::this_fiber::get_id() );
	chan1.push( msg);
    std::string value{ chan2.value_pop() };
    std::cout << "fiber " <<  id << ": " <<  value << " received" << std::endl;
	chan1.push( msg);
    value = chan2.value_pop();
    std::cout << "fiber " <<  id << ": " << value << " received" << std::endl;
	chan1.push( msg);
    value = chan2.value_pop();
    std::cout << "fiber " <<  id << ": " << value << " received" << std::endl;
}

int main()
{
	try
	{
        channel_t chan1{ 2 }, chan2{ 2 };

        boost::fibers::fiber f1( & foo, std::ref( chan1), std::ref( chan2), std::string("ping") );
        boost::fibers::fiber f2( & foo, std::ref( chan2), std::ref( chan1), std::string("pong") );

        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;
}