/* 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 <msg.h>
-#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:
*
* 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; cursor<XBT_MAX_CHANNEL; cursor++) {
+ if (remote_hd->proc[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;}
+
