X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/02305db551e2a0804a3fd7b24622be6b12285572..187ba0c05f9fbe51175179b9f637b6554f947468:/src/gras/Transport/rl_transport.c diff --git a/src/gras/Transport/rl_transport.c b/src/gras/Transport/rl_transport.c deleted file mode 100644 index 244960158c..0000000000 --- a/src/gras/Transport/rl_transport.c +++ /dev/null @@ -1,208 +0,0 @@ -/* $Id$ */ - -/* rl_transport - RL specific functions for transport */ - -/* Copyright (c) 2004 Martin Quinson. All rights reserved. */ - -/* 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 "portable.h" -#include "gras/Transport/transport_private.h" -XBT_LOG_EXTERNAL_CATEGORY(transport); -XBT_LOG_DEFAULT_CATEGORY(transport); - -/** - * gras_trp_select: - * - * Returns the next socket to service because it receives a message. - * - * 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. - */ -xbt_error_t -gras_trp_select(double timeout, - gras_socket_t *dst) { - - xbt_error_t errcode; - xbt_dynar_t sockets= gras_socketset_get(); - int done = -1; - double wakeup = gras_os_time() + 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 */ - /* but accept() of winsock returns sockets bigger than the limit, so don't bother - with this tiny optimisation on BillWare */ - fd_set FDS; - int ready; /* return of select: number of socket ready to be serviced */ - int fd_setsize; /* FD_SETSIZE not always defined. Get this portably */ - - gras_socket_t sock_iter; /* iterating over all sockets */ - int cursor; /* iterating over all sockets */ - - - /* Compute FD_SETSIZE */ -#ifdef HAVE_SYSCONF - fd_setsize = sysconf( _SC_OPEN_MAX ); -#else -# ifdef HAVE_GETDTABLESIZE - fd_setsize = getdtablesize(); -# else - fd_setsize = FD_SETSIZE; -# endif /* !USE_SYSCONF */ -#endif - - *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); - max_fds = -1; - xbt_dynar_foreach(sockets,cursor,sock_iter) { - if (sock_iter->incoming) { - DEBUG1("Considering socket %d for select",sock_iter->sd); -#ifndef HAVE_WINSOCK_H - if (max_fds < sock_iter->sd) - max_fds = sock_iter->sd; -#endif - FD_SET(sock_iter->sd, &FDS); - } else { - DEBUG1("Not considering socket %d for select",sock_iter->sd); - } - } - - if (max_fds == -1) { - if (timeout > 0) { - DEBUG1("No socket to select onto. Sleep %f sec instead.",timeout); - gras_os_sleep(timeout); - return timeout_error; - } else { - DEBUG0("No socket to select onto. Return directly."); - return timeout_error; - } - } - -#ifndef HAVE_WINSOCK_H - /* we cannot have more than FD_SETSIZE sockets - ... but with WINSOCK which returns sockets higher than the limit (killing this optim) */ - if (++max_fds > fd_setsize && fd_setsize > 0) { - WARN1("too many open sockets (%d).",max_fds); - done = 0; - break; - } -#else - max_fds = fd_setsize; -#endif - - 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: - xbt_assert0(0,"Malloc error during the select"); - default: - RAISE2(system_error,"Error during select: %s (%d)", - strerror(errno),errno); - } - RAISE_IMPOSSIBLE; - } else if (ready == 0) { - continue; /* this was a timeout */ - } - - xbt_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=NULL; - - TRYOLD((sock_iter->plugin->socket_accept)(sock_iter,&accepted)); - DEBUG2("accepted=%p,&accepted=%p",accepted,&accepted); - accepted->meas = sock_iter->meas; - } 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; - XBT_OUT; - 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; - } - - } - - XBT_OUT; - return timeout_error; -} - -xbt_error_t gras_trp_sg_setup(gras_trp_plugin_t plug) { - return mismatch_error; -} -