X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/1ab3563b9f429a75fbbdc95c6d3405fc4368d876..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 098a2355f9..0000000000 --- a/src/gras/Transport/rl_transport.c +++ /dev/null @@ -1,223 +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 "xbt/ex.h" -#include "portable.h" -#include "gras/Transport/transport_private.h" -XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(gras_trp); - -/* check transport_private.h for an explanation of this variable */ -gras_socket_t _gras_lastly_selected_socket = NULL; - -/** - * 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. - */ -gras_socket_t gras_trp_select(double timeout) { - xbt_dynar_t sockets= ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets; - 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 */ - static int fd_setsize=-1; /* FD_SETSIZE not always defined. Get this portably */ - - gras_socket_t sock_iter; /* iterating over all sockets */ - int cursor; /* iterating over all sockets */ - - /* Check whether there is more data to read from the socket we selected last time. - This can happen with tcp buffered sockets since we try to get as much data as we can for them */ - if (_gras_lastly_selected_socket && _gras_lastly_selected_socket->moredata) { - VERB0("Returning _gras_lastly_selected_socket since there is more data on it"); - return _gras_lastly_selected_socket; - } - - /* Compute FD_SETSIZE on need */ - if (fd_setsize < 0) { -#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 - } - - while (done == -1) { - if (timeout > 0) { /* did we timeout already? */ - now = gras_os_time(); - DEBUG2("wakeup=%f now=%f",wakeup, now); - if (now == -1 || now >= wakeup) { - /* didn't find anything; no need to update _gras_lastly_selected_socket since its moredata is 0 (or we would have returned it directly) */ - THROW1(timeout_error,0, - "Timeout (%f) elapsed with selecting for incomming connexions", - timeout); - } - } - - /* construct the set of socket to ear from */ - FD_ZERO(&FDS); - max_fds = -1; - xbt_dynar_foreach(sockets,cursor,sock_iter) { - if (!sock_iter->valid) - continue; - - 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); - THROW1(timeout_error,0,"No socket to select onto. Sleep %f sec instead",timeout); - } else { - DEBUG0("No socket to select onto. Return directly."); - THROW0(timeout_error,0, "No socket to select onto. Return directly."); - } - } - -#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); - tout.tv_usec = ((wakeup -now) - ((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; - } - - DEBUG2("Selecting over %d socket(s); timeout=%f", max_fds-1,timeout); - ready = select(max_fds, &FDS, NULL, NULL, p_tout); - DEBUG1("select returned %d", ready); - 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 */ - THROW3(system_error,EINVAL,"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: - THROW2(system_error,errno,"Error during select: %s (%d)", - strerror(errno),errno); - } - THROW_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; - - accepted = (sock_iter->plugin->socket_accept)(sock_iter); - DEBUG2("accepted=%p,&accepted=%p",accepted,&accepted); - accepted->meas = sock_iter->meas; - - } else if (sock_iter->recv_ok) { - /* 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); - sock_iter->valid=0; /* don't close it. User may keep references to it */ - } else { - /* Got a suited socket ! */ - XBT_OUT; - _gras_lastly_selected_socket = sock_iter; - return sock_iter; - } - - } else { - /* This is a file socket. Cannot recv() on it, but it must be alive */ - XBT_OUT; - _gras_lastly_selected_socket = sock_iter; - return sock_iter; - } - - - /* 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; - } - - } - - /* No socket found. Maybe we had timeout=0 and nothing to do */ - DEBUG0("TIMEOUT"); - THROW0(timeout_error,0,"Timeout"); -} - -void gras_trp_sg_setup(gras_trp_plugin_t plug) { - THROW0(mismatch_error,0,"No SG transport on live platforms"); -} -