+++ /dev/null
-/* $Id$ */
-
-/* rl_transport - RL specific functions for transport */
-
-/* Authors: Martin Quinson */
-/* Copyright (C) 2004 Martin Quinson. */
-
-/* This program is free software; you can redistribute it and/or modify it
- under the terms of the license (GNU LGPL) which comes with this package. */
-
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-
-#include "gras/Transport/transport_private.h"
-GRAS_LOG_EXTERNAL_CATEGORY(transport);
-GRAS_LOG_DEFAULT_CATEGORY(transport);
-
-
-
-/**
- * gras_trp_select:
- *
- * Returns the next socket to service having a message awaiting.
- *
- * if timeout<0, we ought to implement the adaptative timeout (FIXME)
- *
- * if timeout=0, do not wait for new message, only handle the ones already there.
- *
- * if timeout>0 and no message there, wait at most that amount of time before giving up.
- */
-gras_error_t
-gras_trp_select(double timeout,
- gras_socket_t **dst) {
-
- gras_error_t errcode;
- gras_dynar_t *sockets= gras_socketset_get();
- int done = -1;
- double wakeup = gras_os_time() + 1000000*timeout;
- double now = 0;
- /* nextToService used to make sure socket with high number do not starve */
- // static int nextToService = 0;
- struct timeval tout, *p_tout;
-
- int max_fds=0; /* first arg of select: number of existing sockets */
- fd_set FDS;
- int ready; /* return of select: number of socket ready to be serviced */
-
- gras_socket_t *sock_iter; /* iterating over all sockets */
- int cursor; /* iterating over all sockets */
-
- *dst=NULL;
- while (done == -1) {
- if (timeout > 0) { /* did we timeout already? */
- now = gras_os_time();
- if (now == -1 || now >= wakeup) {
- done = 0; /* didn't find anything */
- break;
- }
- }
-
- /* construct the set of socket to ear from */
- FD_ZERO(&FDS);
- gras_dynar_foreach(sockets,cursor,sock_iter) {
- if (sock_iter->incoming) {
- if (max_fds < sock_iter->sd)
- max_fds = sock_iter->sd;
- FD_SET(sock_iter->sd, &FDS);
- } else {
- DEBUG1("Not considering socket %d for select",sock_iter->sd);
- }
- }
-
- /* we cannot have more than FD_SETSIZE sockets */
- if (++max_fds > FD_SETSIZE) {
- WARN0("too many open sockets.");
- done = 0;
- break;
- }
-
- if (timeout > 0) {
- /* set the timeout */
- tout.tv_sec = (unsigned long)((wakeup - now)/1000000);
- tout.tv_usec = (unsigned long)(wakeup - now) % 1000000;
- p_tout = &tout;
- } else if (timeout == 0) {
- /* polling only */
- tout.tv_sec = 0;
- tout.tv_usec = 0;
- p_tout = &tout;
- /* we just do one loop around */
- done = 0;
- } else {
- /* no timeout: good luck! */
- p_tout = NULL;
- }
-
- DEBUG1("Selecting over %d socket(s)", max_fds-1);
- ready = select(max_fds, &FDS, NULL, NULL, p_tout);
- if (ready == -1) {
- switch (errno) {
- case EINTR: /* a signal we don't care about occured. we don't care */
- /* if we cared, we would have set an handler */
- continue;
- case EINVAL: /* invalid value */
- RAISE3(system_error,"invalid select: nb fds: %d, timeout: %d.%d",
- max_fds, (int)tout.tv_sec,(int) tout.tv_usec);
- case ENOMEM:
- RAISE_MALLOC;
- default:
- RAISE2(system_error,"Error during select: %s (%d)",
- strerror(errno),errno);
- }
- RAISE_IMPOSSIBLE;
- } else if (ready == 0) {
- continue; /* this was a timeout */
- }
-
- gras_dynar_foreach(sockets,cursor,sock_iter) {
- if(!FD_ISSET(sock_iter->sd, &FDS)) { /* this socket is not ready */
- continue;
- }
-
- /* Got a socket to serve */
- ready--;
-
- if ( sock_iter->accepting
- && sock_iter->plugin->socket_accept) {
- /* not a socket but an ear. accept on it and serve next socket */
- gras_socket_t *accepted;
-
- TRY(sock_iter->plugin->socket_accept(sock_iter,&accepted));
- accepted->raw = sock_iter->raw;
- } else {
-#if 0
- FIXME: this fails of files. quite logical
- /* Make sure the socket is still alive by reading the first byte */
- char lookahead;
- int recvd;
-
- recvd = recv(sock_iter->sd, &lookahead, 1, MSG_PEEK);
- if (recvd < 0) {
- WARN2("socket %d failed: %s", sock_iter->sd, strerror(errno));
- /* done with this socket */
- gras_socket_close(&sock_iter);
- cursor--;
- } else if (recvd == 0) {
- /* Connection reset (=closed) by peer. */
- DEBUG1("Connection %d reset by peer", sock_iter->sd);
- gras_socket_close(&sock_iter);
- cursor--;
- } else {
-#endif
- /* Got a suited socket ! */
- *dst = sock_iter;
- return no_error;
-#if 0
- }
-#endif
- }
-
-
- /* if we're here, the socket we found wasn't really ready to be served */
- if (ready == 0) /* exausted all sockets given by select. Request new ones */
- break;
- }
-
- }
-
- return timeout_error;
-}
-
-gras_error_t gras_trp_sg_setup(gras_trp_plugin_t *plug) {
- return mismatch_error;
-}
