3 /* sg_transport - SG specific functions for transport */
5 /* Copyright (c) 2004 Martin Quinson. All rights reserved. */
7 /* This program is free software; you can redistribute it and/or modify it
8 * under the terms of the license (GNU LGPL) which comes with this package. */
11 #include "gras/Transport/transport_private.h"
12 #include "gras/Virtu/virtu_sg.h"
13 #include "simix/private.h"
15 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(gras_trp);
17 /* check transport_private.h for an explanation of this variable; this just need to be defined to NULL in SG */
18 gras_socket_t _gras_lastly_selected_socket = NULL;
23 * Returns the next socket to service having a message awaiting.
25 * if timeout<0, we ought to implement the adaptative timeout (FIXME)
27 * if timeout=0, do not wait for new message, only handle the ones already there.
29 * if timeout>0 and no message there, wait at most that amount of time before giving up.
31 gras_socket_t gras_trp_select(double timeout) {
33 if (timeout>=0 && !warned) {
35 WARN0("Timed select not implemented in SG. Switching to blocking select");
37 gras_trp_procdata_t pd =
38 (gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id);
40 gras_socket_t sock_iter, active_socket;
41 gras_trp_sg_sock_data_t *active_socket_data;
46 /* FIXME: make sure that the ongoing comm is canceled&destroyed when the corresponding socket is closed */
47 xbt_assert(xbt_dynar_length(pd->sockets)==xbt_dynar_length(pd->comms));
49 /* Wait for the first terminating comm object */
50 int rank = SIMIX_network_waitany(pd->comms);
52 /* Don't wait on this socket until the comm object is recreated by gras_msg_recv */
54 xbt_dynar_set(pd->comms,rank,&comm);
56 /* Ok, got something. Open a socket back to the expeditor */
57 active_socket = xbt_dynar_get_as(pd->sockets,rank,gras_socket_t);
58 active_socket_data = (gras_trp_sg_sock_data_t *) active_socket->data;
60 /* Try to reuse an already opened socket to that expeditor */
61 DEBUG1("Open sockets size %lu", xbt_dynar_length(pd->sockets));
62 xbt_dynar_foreach(pd->sockets, cursor, sock_iter) {
63 gras_trp_sg_sock_data_t *sock_data;
64 DEBUG1("Consider %p as outgoing socket to expeditor", sock_iter);
66 if (sock_iter->meas || !sock_iter->outgoing)
68 sock_data = ((gras_trp_sg_sock_data_t *) sock_iter->data);
70 if ((sock_data->to_socket == active_socket) &&
71 (sock_data->to_host ==
72 SIMIX_process_get_host(active_socket_data->from_process))) {
73 xbt_dynar_cursor_unlock(pd->sockets);
78 /* Socket to expeditor not created yet */
79 DEBUG0("Create a socket to the expeditor");
87 gras_trp_procdata_t pd =
88 (gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id);
89 gras_trp_sg_sock_data_t *sockdata;
90 gras_trp_plugin_t trp;
91 gras_socket_t active_socket = NULL;
92 gras_trp_sg_sock_data_t *active_socket_data;
93 gras_socket_t sock_iter; /* iterating over all sockets */
96 DEBUG3("select on %s@%s with timeout=%f",
97 SIMIX_process_get_name(SIMIX_process_self()),
98 SIMIX_host_get_name(SIMIX_host_self()), timeout);
100 xbt_queue_shift_timed(pd->msg_selectable_sockets,
101 &active_socket, timeout);
103 xbt_queue_shift(pd->msg_selectable_sockets, &active_socket);
106 if (active_socket == NULL) {
108 THROW0(timeout_error, 0, "Timeout");
110 active_socket_data = (gras_trp_sg_sock_data_t *) active_socket->data;
112 /* Ok, got something. Open a socket back to the expeditor */
114 /* Try to reuse an already openned socket to that expeditor */
115 DEBUG1("Open sockets size %lu", xbt_dynar_length(pd->sockets));
116 xbt_dynar_foreach(pd->sockets, cursor, sock_iter) {
117 gras_trp_sg_sock_data_t *sock_data;
118 DEBUG1("Consider %p as outgoing socket to expeditor", sock_iter);
120 if (sock_iter->meas || !sock_iter->outgoing)
122 sock_data = ((gras_trp_sg_sock_data_t *) sock_iter->data);
124 if ((sock_data->to_socket == active_socket) &&
125 (sock_data->to_host ==
126 SIMIX_process_get_host(active_socket_data->from_process))) {
127 xbt_dynar_cursor_unlock(pd->sockets);
132 /* Socket to expeditor not created yet */
133 DEBUG0("Create a socket to the expeditor");
135 trp = gras_trp_plugin_get_by_name("sg");
137 gras_trp_socket_new(1, &res);
147 /* initialize the ports */
148 //res->peer_port = active_socket->port;
149 res->port = active_socket->peer_port;
151 /* create sockdata */
152 sockdata = xbt_new(gras_trp_sg_sock_data_t, 1);
153 sockdata->from_process = SIMIX_process_self();
154 sockdata->to_process = active_socket_data->from_process;
156 res->peer_port = ((gras_trp_procdata_t)
157 gras_libdata_by_name_from_remote("gras_trp",
158 sockdata->to_process))->
160 sockdata->to_socket = active_socket;
161 /*update the peer to_socket variable */
162 active_socket_data->to_socket = res;
163 sockdata->cond = SIMIX_cond_init();
164 sockdata->mutex = SIMIX_mutex_init();
167 SIMIX_process_get_host(active_socket_data->from_process);
169 res->data = sockdata;
170 res->peer_name = strdup(SIMIX_host_get_name(sockdata->to_host));
172 gras_trp_buf_init_sock(res);
174 DEBUG4("Create socket to process:%s(Port %d) from process: %s(Port %d)",
175 SIMIX_process_get_name(sockdata->from_process),
177 SIMIX_process_get_name(sockdata->to_process), res->port);
184 /* dummy implementations of the functions used in RL mode */
186 void gras_trp_tcp_setup(gras_trp_plugin_t plug)
188 THROW0(mismatch_error, 0, NULL);
191 void gras_trp_file_setup(gras_trp_plugin_t plug)
193 THROW0(mismatch_error, 0, NULL);
196 void gras_trp_iov_setup(gras_trp_plugin_t plug)
198 THROW0(mismatch_error, 0, NULL);
201 gras_socket_t gras_trp_buf_init_sock(gras_socket_t sock)