service.c

			/* having drained the rxflow buffer, can rearm POLLIN */
#ifdef LWS_NO_SERVER
			n =
#endif
			_lws_rx_flow_control(wsi);
			/* n ignored, needed for NO_SERVER case */
		}

		break;
#ifdef LWS_WITH_CGI
	case LWSCM_CGI: /* we exist to handle a cgi's stdin/out/err data...
			 * do the callback on our master wsi
			 */
		{
			struct lws_cgi_args args;

			if (wsi->cgi_channel >= LWS_STDOUT &&
			    !(pollfd->revents & pollfd->events & LWS_POLLIN))
				break;
			if (wsi->cgi_channel == LWS_STDIN &&
			    !(pollfd->revents & pollfd->events & LWS_POLLOUT))
				break;

			if (wsi->cgi_channel == LWS_STDIN)
				if (lws_change_pollfd(wsi, LWS_POLLOUT, 0)) {
					lwsl_info("failed at set pollfd\n");
					return 1;
				}

			args.ch = wsi->cgi_channel;
			args.stdwsi = &wsi->parent->cgi->stdwsi[0];
			args.hdr_state = wsi->hdr_state;

			//lwsl_err("CGI LWS_STDOUT waiting wsi %p mode %d state %d\n",
			//	 wsi->parent, wsi->parent->mode, wsi->parent->state);

			if (user_callback_handle_rxflow(
					wsi->parent->protocol->callback,
					wsi->parent, LWS_CALLBACK_CGI,
					wsi->parent->user_space,
					(void *)&args, 0))
				return 1;

			break;
		}
#endif
	default:
#ifdef LWS_NO_CLIENT
		break;
#else
		n = lws_client_socket_service(context, wsi, pollfd);
		if (n)
			return 1;
		goto handled;
#endif
	}

	n = 0;
	goto handled;

close_and_handled:
	lwsl_debug("Close and handled\n");
	lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS);
	/*
	 * pollfd may point to something else after the close
	 * due to pollfd swapping scheme on delete on some platforms
	 * we can't clear revents now because it'd be the wrong guy's revents
	 */
	return 1;

handled:
	pollfd->revents = 0;
	return n;
}

LWS_VISIBLE int
lws_service_fd(struct lws_context *context, struct lws_pollfd *pollfd)
{
	return lws_service_fd_tsi(context, pollfd, 0);
}

/**
 * lws_service() - Service any pending websocket activity
 * @context:	Websocket context
 * @timeout_ms:	Timeout for poll; 0 means return immediately if nothing needed
 *		service otherwise block and service immediately, returning
 *		after the timeout if nothing needed service.
 *
 *	This function deals with any pending websocket traffic, for three
 *	kinds of event.  It handles these events on both server and client
 *	types of connection the same.
 *
 *	1) Accept new connections to our context's server
 *
 *	2) Call the receive callback for incoming frame data received by
 *	    server or client connections.
 *
 *	You need to call this service function periodically to all the above
 *	functions to happen; if your application is single-threaded you can
 *	just call it in your main event loop.
 *
 *	Alternatively you can fork a new process that asynchronously handles
 *	calling this service in a loop.  In that case you are happy if this
 *	call blocks your thread until it needs to take care of something and
 *	would call it with a large nonzero timeout.  Your loop then takes no
 *	CPU while there is nothing happening.
 *
 *	If you are calling it in a single-threaded app, you don't want it to
 *	wait around blocking other things in your loop from happening, so you
 *	would call it with a timeout_ms of 0, so it returns immediately if
 *	nothing is pending, or as soon as it services whatever was pending.
 */

LWS_VISIBLE int
lws_service(struct lws_context *context, int timeout_ms)
{
	return lws_plat_service(context, timeout_ms);
}

LWS_VISIBLE int
lws_service_tsi(struct lws_context *context, int timeout_ms, int tsi)
{
	return lws_plat_service_tsi(context, timeout_ms, tsi);
}