Function select_wait

src/remote/inet.cpp:2241–2408

}

static bool select_wait( rem_port* main_port, Select* selct)
{
/**************************************
 *
 *	s e l e c t _ w a i t
 *
 **************************************
 *
 * Functional description
 *	Select interesting descriptors from
 *	port blocks and wait for something
 *	to read from them.
 *
 **************************************/
	struct timeval timeout;
	bool checkPorts = false;

	for (;;)
	{
		selct->clear();
		bool found = false;

		// Use the time interval between select() calls to expire
		// keepalive timers on all ports.

		time_t delta_time;
		if (selct->slct_time)
		{
			delta_time = time(NULL) - selct->slct_time;
			selct->slct_time += delta_time;
		}
		else
		{
			delta_time = 0;
			selct->slct_time = time(NULL);
		}

		{ // port_mutex scope
			MutexLockGuard guard(port_mutex, FB_FUNCTION);

			while (ports_to_close->hasData())
			{
				SOCKET s = ports_to_close->pop();
				SOCLOSE(s);
			}

			for (rem_port* port = main_port; port; port = port->port_next)
			{
				if (port->port_state == rem_port::PENDING &&
					// don't wait on still listening (not connected) async port
					!(port->port_handle == INVALID_SOCKET && (port->port_flags & PORT_async)))
 				{
					// Adjust down the port's keepalive timer.

					if (port->port_dummy_packet_interval)
					{
						port->port_dummy_timeout -= delta_time;
					}