#include "xbt/ex.h"
#include "gras/Transport/transport_private.h"
-#include "msg/msg.h"
#include "gras/Virtu/virtu_sg.h"
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_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 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 active_socket;
+ gras_socket_t sock_iter; /* iterating over all sockets */
+ int cursor;
+
+ DEBUG0("Trying to get the lock pd, trp_select");
+ SIMIX_mutex_lock(pd->mutex);
+ DEBUG3("select on %s@%s with timeout=%f",
+ SIMIX_process_get_name(SIMIX_process_self()),
+ SIMIX_host_get_name(SIMIX_host_self()),
+ timeout);
+
+ if (xbt_fifo_size(pd->active_socket) == 0) {
+ /* message didn't arrive yet, wait */
+ SIMIX_cond_wait_timeout(pd->cond,pd->mutex,timeout);
+ }
- gras_socket_t sock_iter; /* iterating over all sockets */
- int cursor,cpt;
+ if (xbt_fifo_size(pd->active_socket) == 0) {
+ DEBUG0("TIMEOUT");
+ SIMIX_mutex_unlock(pd->mutex);
+ THROW0(timeout_error,0,"Timeout");
+ }
+ active_socket = xbt_fifo_shift(pd->active_socket);
+
+ /* 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) {
+ DEBUG1("Consider %p as outgoing socket to expeditor",sock_iter);
+
+ if (sock_iter->meas || !sock_iter->outgoing)
+ continue;
+ /*
+ if ((sock_iter->peer_port == active_socket->port) &&
+ (((gras_trp_sg_sock_data_t*)sock_iter->data)->to_host == SIMIX_process_get_host(((gras_trp_sg_sock_data_t*)active_socket->data)->from_process))) {
+ */
+ if ( (((gras_trp_sg_sock_data_t*)sock_iter->data)->to_socket == active_socket) && (((gras_trp_sg_sock_data_t*)sock_iter->data)->to_host == SIMIX_process_get_host(((gras_trp_sg_sock_data_t*)active_socket->data)->from_process)) ) {
+ SIMIX_mutex_unlock(pd->mutex);
+ return sock_iter;
+ }
+ }
- gras_sg_portrec_t pr; /* iterating to find the chanel of expeditor */
+ /* Socket to expeditor not created yet */
+ DEBUG0("Create a socket to the expeditor");
- int r_pid;
- gras_hostdata_t *remote_hd;
+ trp = gras_trp_plugin_get_by_name("sg");
- DEBUG3("select on %s@%s with timeout=%f",
- MSG_process_get_name(MSG_process_self()),
- MSG_host_get_name(MSG_host_self()),
- timeout);
+ gras_trp_socket_new(1,&res);
+ res->plugin = trp;
- 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;
+ 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 = ((gras_trp_sg_sock_data_t*)(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 */
+ ((gras_trp_sg_sock_data_t*)active_socket->data)->to_socket = res;
+ sockdata->cond = SIMIX_cond_init();
+ sockdata->mutex = SIMIX_mutex_init();
+
+ sockdata->to_host = SIMIX_process_get_host(((gras_trp_sg_sock_data_t*)(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);
+
+ SIMIX_mutex_unlock(pd->mutex);
+ return res;
}
