C++ io_service::poll方法代码示例

int main()
{
	SerialPort port(
		"/dev/tty.usbmodemfa1311",
		// "/dev/tty.usbmodemfa141",
		57600, iosrv,
			[](std::vector<uint8_t>& data) { on_serial_data_receive(data); });

	ba::deadline_timer timer(iosrv, boost::posix_time::seconds(1));

	std::function<void(boost::system::error_code const&)> on_timeout;
	auto relauch_timer = [&]() { timer.async_wait(on_timeout); };
	on_timeout = [&](boost::system::error_code const&)
		{
			on_timer(port);
			timer.expires_from_now(period);
			relauch_timer();
		};

	relauch_timer();

	while(true)
	{
		iosrv.poll();
	}

	return 0;
}

	void run_event_loop_until_connect()
	{
		while (!last_error && !is_connected) {
			service.poll();
			service.reset();
			check_if_timed_out();
		}
	}

	void run_event_loop_until_frame_received()
	{
		using boost::bind;
		have_frame = false;
		buffer.consume(buffer.size());
		last_error = boost::system::error_code();
		boost::asio::async_read_until(socket,
									  buffer,
									  "END\r\n",
									  bind(&TimedSessionBase::handle_frame_reception,
										   this,
										   boost::asio::placeholders::error,
										   boost::asio::placeholders::bytes_transferred));
		service.reset();
		while (!last_error && !have_frame) {
			service.poll();
			service.reset();
			check_if_timed_out();
		}
	}

// MsgWaitForMultipleObjectsEx 集成进去.
static inline void avloop_run_gui(boost::asio::io_service& io_service)
{
	using namespace ::detail;

	boost::asio::io_service::work work(io_service);

	if (!boost::asio::has_service<IdleService>(io_service))
		boost::asio::add_service(io_service, new IdleService(io_service));

	if (!boost::asio::has_service<Win32MsgLoopService>(io_service))
		boost::asio::add_service(io_service, new Win32MsgLoopService(io_service));

	while (!io_service.stopped())
	{
		// 首先处理 asio 的消息.
		while (io_service.poll())
		{
			// 然后执行 gui 循环，看有没有 gui 事件.
			if (boost::asio::use_service<Win32MsgLoopService>(io_service).has_message())
			{
				// 执行以下.
				boost::asio::use_service<Win32MsgLoopService>(io_service).poll_one();
			}
		}
		// 然后执行 gui 循环，看有没有 gui 事件.
		while(boost::asio::use_service<Win32MsgLoopService>(io_service).has_message())
		{
			// 执行以下.
			boost::asio::use_service<Win32MsgLoopService>(io_service).poll_one();
		}

		// 执行 idle handler!
		if (boost::asio::use_service<IdleService>(io_service).has_idle())
			boost::asio::use_service<IdleService>(io_service).poll_one();

		// 都没有事件了，执行 一次 1ms 的超时等待.
		auto ret = MsgWaitForMultipleObjectsEx(0, nullptr, 1, QS_ALLEVENTS, MWMO_WAITALL|MWMO_ALERTABLE | MWMO_INPUTAVAILABLE);
		// 可能是有 gui 消息了， 呵呵， 从头来吧.
	}
}

static inline void avloop_run(boost::asio::io_service& io_service)
{
	using namespace ::detail;

	if (!boost::asio::has_service<IdleService>(io_service))
		boost::asio::add_service(io_service, new IdleService(io_service));

	while (!io_service.stopped())
	{
		if(!boost::asio::use_service<IdleService>(io_service).has_idle())
		{
			if (!io_service.run_one())
				break;
		}
		else
		{
			while (io_service.poll());
			// 执行 idle handler!
			boost::asio::use_service<IdleService>(io_service).poll_one();
		}
	}
}

        service( boost::asio::io_service & io_svc) :
            boost::asio::io_service::service( io_svc),
            work_{ new boost::asio::io_service::work( io_svc) } {
            io_svc.post([&io_svc](){
//]
//[asio_rr_service_lambda
                while ( ! io_svc.stopped() ) {
                    if ( boost::fibers::has_ready_fibers() ) {
                        // run all pending handlers in round_robin
                        while ( io_svc.poll() );
                        // run pending (ready) fibers
                        this_fiber::yield();
                    } else {
                        // run one handler inside io_service
                        // if no handler available, block this thread
                        if ( ! io_svc.run_one() ) {
                            break;
                        }
                    }
                }
//]
//[asio_rr_service_bottom
            });
        }

//---------------------------------------------------------
void run_01(boost::asio::io_service& io_service, boost::thread::id id)
{
	io_service.post(boost::bind(check_thread_id_01, id));
	io_service.post(boost::bind(check_thread_id_00, boost::this_thread::get_id()));
	io_service.poll();
}

 void poll()
 {
   io_service_.poll();
 }

void Connection::Poll()
{
	netservice.poll();
}

Connection::~Connection()
{
	sock.close();
	netservice.poll();
	netservice.reset();
}