X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/de6fe5331b6bca5f67584856912729a0814118ef..778f65057da68465382593cd036b6ee59ada54e9:/src/gras/Transport/sg_transport.c diff --git a/src/gras/Transport/sg_transport.c b/src/gras/Transport/sg_transport.c index bf56bc557a..e11b1166be 100644 --- a/src/gras/Transport/sg_transport.c +++ b/src/gras/Transport/sg_transport.c @@ -2,18 +2,20 @@ /* sg_transport - SG specific functions for transport */ -/* Authors: Martin Quinson */ -/* Copyright (C) 2004 Martin Quinson. */ +/* 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. */ + * under the terms of the license (GNU LGPL) which comes with this package. */ -#include "Transport/transport_private.h" -#include -#include "Virtu/virtu_sg.h" +#include "xbt/ex.h" +#include "gras/Transport/transport_private.h" +#include "msg/msg.h" +#include "gras/Virtu/virtu_sg.h" -GRAS_LOG_EXTERNAL_CATEGORY(transport); -GRAS_LOG_DEFAULT_CATEGORY(transport); +XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(gras_trp); + +/* check transport_private.h for an explanation of this variable; this just need to be defined to NULL in SG */ +gras_socket_t _gras_lastly_selected_socket = NULL; /** * gras_trp_select: @@ -26,57 +28,121 @@ GRAS_LOG_DEFAULT_CATEGORY(transport); * * 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) { - - double startTime=gras_time(); - gras_procdata_t *pd=gras_procdata_get(); +gras_socket_t gras_trp_select(double timeout) { + + gras_socket_t res; + gras_trp_procdata_t pd = + (gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id); gras_trp_sg_sock_data_t *sockdata; + gras_trp_plugin_t trp; - int r_pid, cpt; - m_process_t remote; - gras_hostdata_t *remote_hd; - - do { - r_pid = MSG_task_probe_from((m_channel_t) pd->chan); - if (r_pid >= 0) { - *dst = pd->sock; - sockdata = (*dst)->data; - - remote = MSG_process_from_PID(r_pid); - sockdata->from_PID = r_pid; - sockdata->to_PID = MSG_process_self_PID(); - sockdata->to_host = MSG_process_get_host(remote); - - remote_hd=(gras_hostdata_t *)MSG_host_get_data(sockdata->to_host); - gras_assert0(remote_hd,"Run gras_process_init!!"); - - sockdata->to_chan = -1; - for (cpt=0; cpt< GRAS_MAX_CHANNEL; cpt++) - if (r_pid == remote_hd->proc[cpt]) - sockdata->to_chan = cpt; - - gras_assert0(sockdata->to_chan>0, - "Got a message from a process without channel"); - - return no_error; - } else { - MSG_process_sleep(0.01); - } - } while (gras_time()-startTime < timeout - || MSG_task_Iprobe((m_channel_t) pd->chan)); + gras_socket_t sock_iter; /* iterating over all sockets */ + int cursor,cpt; - return timeout_error; + gras_sg_portrec_t pr; /* iterating to find the chanel of expeditor */ -} + int r_pid; + gras_hostdata_t *remote_hd; + DEBUG3("select on %s@%s with timeout=%f", + MSG_process_get_name(MSG_process_self()), + MSG_host_get_name(MSG_host_self()), + timeout); + + MSG_channel_select_from((m_channel_t) pd->chan, timeout, &r_pid); + + if (r_pid < 0) { + DEBUG0("TIMEOUT"); + THROW0(timeout_error,0,"Timeout"); + } + + /* Ok, got something. Open a socket back to the expeditor */ + + /* Try to reuse an already openned socket to that expeditor */ + xbt_dynar_foreach(pd->sockets,cursor,sock_iter) { + DEBUG1("Consider %p as outgoing socket to expeditor",sock_iter); + + if (sock_iter->meas || !sock_iter->outgoing) + continue; + + sockdata = sock_iter->data; + if (sockdata->to_PID == r_pid) { + return sock_iter; + } + } + + /* Socket to expeditor not created yet */ + DEBUG0("Create a socket to the expeditor"); + + trp = gras_trp_plugin_get_by_name("sg"); + + gras_trp_socket_new(1,&res); + res->plugin = trp; + + res->incoming = 1; + res->outgoing = 1; + res->accepting = 0; + res->sd = -1; + + res->port = -1; + + sockdata = xbt_new(gras_trp_sg_sock_data_t,1); + sockdata->from_PID = MSG_process_self_PID(); + sockdata->to_PID = r_pid; + sockdata->to_host = MSG_process_get_host(MSG_process_from_PID(r_pid)); + res->data = sockdata; + gras_trp_buf_init_sock(res); + + res->peer_name = strdup(MSG_host_get_name(sockdata->to_host)); + + remote_hd=(gras_hostdata_t *)MSG_host_get_data(sockdata->to_host); + xbt_assert0(remote_hd,"Run gras_process_init!!"); + + sockdata->to_chan = -1; + res->peer_port = -10; + for (cursor=0; cursorproc[cursor] == r_pid) { + sockdata->to_chan = cursor; + DEBUG2("Chan %d on %s is for my pal", + cursor,res->peer_name); + + xbt_dynar_foreach(remote_hd->ports, cpt, pr) { + if (sockdata->to_chan == pr.tochan) { + if (pr.meas) { + DEBUG0("Damn, it's for measurement"); + continue; + } + + res->peer_port = pr.port; + DEBUG1("Cool, it points to port %d", pr.port); + break; + } else { + DEBUG2("Wrong port (tochan=%d, looking for %d)\n", + pr.tochan,sockdata->to_chan); + } + } + if (res->peer_port == -10) { + /* was for measurement */ + sockdata->to_chan = -1; + } else { + /* found it, don't let it override by meas */ + break; + } + } + } + res->peer_port = ((gras_trp_procdata_t) gras_libdata_by_name_from_remote("gras_trp",MSG_process_from_PID(r_pid)))->myport; + xbt_assert0(sockdata->to_chan != -1, + "Got a message from a process without channel"); + + return res; +} + /* dummy implementations of the functions used in RL mode */ -gras_error_t gras_trp_tcp_setup(gras_trp_plugin_t *plug) { - return mismatch_error; -} -gras_error_t gras_trp_file_setup(gras_trp_plugin_t *plug) { - return mismatch_error; -} +void gras_trp_tcp_setup(gras_trp_plugin_t plug) { THROW0(mismatch_error,0,NULL); } +void gras_trp_file_setup(gras_trp_plugin_t plug){ THROW0(mismatch_error,0,NULL); } +void gras_trp_iov_setup(gras_trp_plugin_t plug) { THROW0(mismatch_error,0,NULL); } + +gras_socket_t gras_trp_buf_init_sock(gras_socket_t sock) { return sock;} +