#include <future>
#include <iostream>
#include <boost/fiber/all.hpp>

int main()
{
	const int N = 2;
	
	for (int i = 0; i < N; ++i)
		auto f = std::async([]
		{
			while (true)
			{
				std::cout << "hola, soy "
				          << boost::this_fiber::get_id()
				          << std::endl;
				boost::this_fiber::yield();
			}
		});
}