/* 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 "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:
*
* Returns the next socket to service having a message awaiting.
*
* 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;
- double startTime=gras_os_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;
-
- gras_socket_t *sock_iter; /* iterating over all sockets */
- int cursor,cpt;
-
- gras_sg_portrec_t pr; /* iterating to find the chanel of expeditor */
-
- int r_pid;
- gras_hostdata_t *remote_hd;
+ gras_trp_plugin_t trp;
+ gras_socket_t active_socket = NULL;
+ gras_trp_sg_sock_data_t *active_socket_data;
+ gras_socket_t sock_iter; /* iterating over all sockets */
+ int cursor;
DEBUG3("select on %s@%s with timeout=%f",
- MSG_process_get_name(MSG_process_self()),
- MSG_host_get_name(MSG_host_self()),
+ SIMIX_process_get_name(SIMIX_process_self()),
+ SIMIX_host_get_name(SIMIX_host_self()),
timeout);
- do {
- r_pid = MSG_task_probe_from((m_channel_t) pd->chan);
- if (r_pid >= 0) {
- /* Try to reuse an already openned socket to that expeditor */
- gras_dynar_foreach(pd->sockets,cursor,sock_iter) {
- DEBUG1("Consider %p as outgoing socket to expeditor",sock_iter);
- sockdata = sock_iter->data;
-
- if (sock_iter->raw || !sock_iter->outgoing)
- continue;
-
- if (sockdata->from_PID == r_pid) {
- *dst=sock_iter;
- return no_error;
- }
- }
-
- /* Socket to expeditor not created yet */
- DEBUG0("Create a socket to the expeditor");
-
- TRY(gras_trp_plugin_get_by_name("sg",&trp));
-
- TRY(gras_trp_socket_new(1,dst));
- (*dst)->plugin = trp;
-
- (*dst)->incoming = 1;
- (*dst)->outgoing = 1;
- (*dst)->accepting = 0;
- (*dst)->sd = -1;
-
- (*dst)->port = -1;
-
- if (!(sockdata = malloc(sizeof(gras_trp_sg_sock_data_t))))
- RAISE_MALLOC;
-
- 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));
- (*dst)->data = sockdata;
-
- (*dst)->peer_name = strdup(MSG_host_get_name(sockdata->to_host));
-
- remote_hd=(gras_hostdata_t *)MSG_host_get_data(sockdata->to_host);
- gras_assert0(remote_hd,"Run gras_process_init!!");
-
- sockdata->to_chan = -1;
- (*dst)->peer_port = -10;
- for (cursor=0; cursor<GRAS_MAX_CHANNEL; cursor++) {
- if (remote_hd->proc[cursor] == r_pid) {
- sockdata->to_chan = cursor;
- DEBUG2("Chan %d on %s is for my pal",
- cursor,(*dst)->peer_name);
-
- gras_dynar_foreach(remote_hd->ports, cpt, pr) {
- if (sockdata->to_chan == pr.tochan) {
- if (pr.raw) {
- DEBUG0("Damn, it's raw");
- continue;
- }
-
- (*dst)->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 ((*dst)->peer_port == -10) {
- /* was raw */
- sockdata->to_chan = -1;
- } else {
- /* found it, don't let it override by raw */
- break;
- }
- }
- }
- gras_assert0(sockdata->to_chan != -1,
- "Got a message from a process without channel");
-
- return no_error;
- } else {
- /*
- DEBUG2("Select on %s@%s did not find anything yet",
- MSG_process_get_name(MSG_process_self()),
- MSG_host_get_name(MSG_host_self()));
- */
- // MSG_process_sleep(1);
- MSG_process_sleep(0.01);
+ if (timeout>=0) {
+ xbt_queue_shift_timed(pd->msg_selectable_sockets,
+ &active_socket, timeout);
+ } else {
+ xbt_queue_shift(pd->msg_selectable_sockets, &active_socket);
+ }
+
+ if (active_socket == NULL) {
+ DEBUG0("TIMEOUT");
+ THROW0(timeout_error,0,"Timeout");
+ }
+ active_socket_data = (gras_trp_sg_sock_data_t*)active_socket->data;
+
+ /* Ok, got something. Open a socket back to the expeditor */
+
+ /* Try to reuse an already openned socket to that expeditor */
+ DEBUG1("Open sockets size %lu",xbt_dynar_length(pd->sockets));
+ xbt_dynar_foreach(pd->sockets,cursor,sock_iter) {
+ gras_trp_sg_sock_data_t *sock_data;
+ DEBUG1("Consider %p as outgoing socket to expeditor",sock_iter);
+
+ if (sock_iter->meas || !sock_iter->outgoing)
+ continue;
+ sock_data = ((gras_trp_sg_sock_data_t*)sock_iter->data);
+
+ if ( (sock_data->to_socket == active_socket) &&
+ (sock_data->to_host == SIMIX_process_get_host(active_socket_data->from_process)) ) {
+ xbt_dynar_cursor_unlock(pd->sockets);
+ return sock_iter;
}
- } while (gras_os_time()-startTime < timeout
- || MSG_task_Iprobe((m_channel_t) pd->chan));
+ }
+
+ /* Socket to expeditor not created yet */
+ DEBUG0("Create a socket to the expeditor");
- return timeout_error;
+ 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;
+
+ /* initialize the ports */
+ //res->peer_port = active_socket->port;
+ res->port = active_socket->peer_port;
+
+ /* create sockdata */
+ sockdata = xbt_new(gras_trp_sg_sock_data_t,1);
+ sockdata->from_process = SIMIX_process_self();
+ sockdata->to_process = active_socket_data->from_process;
+
+ res->peer_port =
+ ((gras_trp_procdata_t)gras_libdata_by_name_from_remote("gras_trp",sockdata->to_process))->myport;
+ sockdata->to_socket = active_socket;
+ /*update the peer to_socket variable */
+ active_socket_data->to_socket = res;
+ sockdata->cond = SIMIX_cond_init();
+ sockdata->mutex = SIMIX_mutex_init();
+
+ sockdata->to_host = SIMIX_process_get_host(active_socket_data->from_process);
+
+ res->data = sockdata;
+ res->peer_name = strdup(SIMIX_host_get_name(sockdata->to_host));
+
+ gras_trp_buf_init_sock(res);
+
+ DEBUG4("Create socket to process:%s(Port %d) from process: %s(Port %d)",
+ SIMIX_process_get_name(sockdata->from_process),
+ res->peer_port,
+ SIMIX_process_get_name(sockdata->to_process), res->port);
+
+ 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;}
+
