3 /* sg_transport - SG specific functions for transport */
5 /* Authors: Martin Quinson */
6 /* Copyright (C) 2004 Martin Quinson. */
8 /* This program is free software; you can redistribute it and/or modify it
9 under the terms of the license (GNU LGPL) which comes with this package. */
11 #include "Transport/transport_private.h"
13 #include "Virtu/virtu_sg.h"
15 GRAS_LOG_EXTERNAL_CATEGORY(transport);
16 GRAS_LOG_DEFAULT_CATEGORY(transport);
21 * Returns the next socket to service having a message awaiting.
23 * if timeout<0, we ought to implement the adaptative timeout (FIXME)
25 * if timeout=0, do not wait for new message, only handle the ones already there.
27 * if timeout>0 and no message there, wait at most that amount of time before giving up.
30 gras_trp_select(double timeout,
31 gras_socket_t **dst) {
34 double startTime=gras_os_time();
35 gras_procdata_t *pd=gras_procdata_get();
36 gras_trp_sg_sock_data_t *sockdata;
37 gras_trp_plugin_t *trp;
39 gras_socket_t *sock_iter; /* iterating over all sockets */
42 gras_sg_portrec_t pr; /* iterating to find the chanel of expeditor */
45 gras_hostdata_t *remote_hd;
47 DEBUG3("select on %s@%s with timeout=%d",
48 MSG_process_get_name(MSG_process_self()),
49 MSG_host_get_name(MSG_host_self()),
52 r_pid = MSG_task_probe_from((m_channel_t) pd->chan);
54 /* Try to reuse an already openned socket to that expeditor */
55 gras_dynar_foreach(pd->sockets,cursor,sock_iter) {
56 DEBUG1("Consider %p as outgoing socket to expeditor",sock_iter);
57 sockdata = sock_iter->data;
59 if (sock_iter->raw || !sock_iter->outgoing)
62 if (sockdata->from_PID == r_pid) {
68 /* Socket to expeditor not created yet */
69 DEBUG0("Create a socket to the expeditor");
71 TRY(gras_trp_plugin_get_by_name("sg",&trp));
73 TRY(gras_trp_socket_new(1,dst));
78 (*dst)->accepting = 0;
83 if (!(sockdata = malloc(sizeof(gras_trp_sg_sock_data_t))))
86 sockdata->from_PID = MSG_process_self_PID();
87 sockdata->to_PID = r_pid;
88 sockdata->to_host = MSG_process_get_host(MSG_process_from_PID(r_pid));
89 (*dst)->data = sockdata;
91 (*dst)->peer_name = strdup(MSG_host_get_name(sockdata->to_host));
93 remote_hd=(gras_hostdata_t *)MSG_host_get_data(sockdata->to_host);
94 gras_assert0(remote_hd,"Run gras_process_init!!");
96 sockdata->to_chan = -1;
97 (*dst)->peer_port = -10;
98 for (cursor=0; cursor<GRAS_MAX_CHANNEL; cursor++) {
99 if (remote_hd->proc[cursor] == r_pid) {
100 sockdata->to_chan = cursor;
101 DEBUG2("Chan %d on %s is for my pal",
102 cursor,(*dst)->peer_name);
104 gras_dynar_foreach(remote_hd->ports, cpt, pr) {
105 if (sockdata->to_chan == pr.tochan) {
107 DEBUG0("Damn, it's raw");
111 (*dst)->peer_port = pr.port;
112 DEBUG1("Cool, it points to port %d", pr.port);
115 DEBUG2("Wrong port (tochan=%d, looking for %d)\n",
116 pr.tochan,sockdata->to_chan);
119 if ((*dst)->peer_port == -10) {
121 sockdata->to_chan = -1;
123 /* found it, don't let it override by raw */
128 gras_assert0(sockdata->to_chan != -1,
129 "Got a message from a process without channel");
134 DEBUG2("Select on %s@%s did not find anything yet",
135 MSG_process_get_name(MSG_process_self()),
136 MSG_host_get_name(MSG_host_self()));
138 // MSG_process_sleep(1);
139 MSG_process_sleep(0.01);
141 } while (gras_os_time()-startTime < timeout
142 || MSG_task_Iprobe((m_channel_t) pd->chan));
144 return timeout_error;
149 /* dummy implementations of the functions used in RL mode */
151 gras_error_t gras_trp_tcp_setup(gras_trp_plugin_t *plug) {
152 return mismatch_error;
154 gras_error_t gras_trp_file_setup(gras_trp_plugin_t *plug) {
155 return mismatch_error;