boost 对称协程symmetric_coroutine

#include "boost_1_60_0/boost/coroutine/coroutine.hpp"

int main()
{
	using   Coroutine_t = boost::coroutines::symmetric_coroutine<int>;

	Coroutine_t::call_type coro_recv(
		[&](Coroutine_t::yield_type& yield) {
		//loop for recv
		for (;;)
		{
			std::cout << yield.get() << " recv" << endl;
			yield(); //give up time  slice and jump back to starting context
		}
	});

	Coroutine_t::call_type coro_send(
		[&](Coroutine_t::yield_type& yield) {
		//loop for send
		for (;;)
		{
			yield.get();
			std::cout << yield.get() << " send" << endl;
			yield(); 
		}
	});


	while (true)
	{
		coro_recv(1); //recv

		coro_send(1); // send

	}

	system("pause");

	return 0;
}

此外可以用ASIO 的 定时器 和协程 来完成 定时任务

#include "boost_1_60_0/boost/asio/steady_timer.hpp"
#include "boost_1_60_0/boost/asio/spawn.hpp"
int main()
{
	boost::asio::io_service io;

	boost::asio::steady_timer timer(io);
	using namespace boost::asio;


	//协程1
	spawn(io, [&](yield_context yield) {
		while (true)
		{
			boost::asio::steady_timer timer(io);
			timer.expires_from_now(std::chrono::seconds(1));
			timer.async_wait(yield);
	 
			cout << "1111111111" << endl;;
		}
	});

	//协程2
	spawn(io, [&](yield_context yield) {
		while (true)
		{
			boost::asio::steady_timer timer(io);
			timer.expires_from_now(std::chrono::milliseconds(500));
			timer.async_wait(yield);
		
			cout << "22222222222"<<endl;
		}
	});
		

	io.run();//



	while (true)
	{
		Sleep(100);
	}


	system("pause");

	return 0;
}