1 /* Thread in charge of listening the network and queuing incoming messages */
3 /* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "gras/Msg/msg_private.h"
10 #include "gras/Transport/transport_private.h"
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_msg_read, gras_msg,
12 "Message reader thread");
15 #include "xbt/queue.h"
16 #include "xbt/synchro.h"
18 #include "gras/Transport/transport_interface.h" /* gras_select */
20 typedef struct s_gras_msg_listener_ {
21 xbt_queue_t incomming_messages;
22 xbt_queue_t socks_to_close; /* let the listener close the sockets, since it may be selecting on them. Darwin don't like this trick */
23 gras_socket_t wakeup_sock_listener_side;
24 gras_socket_t wakeup_sock_master_side;
25 xbt_thread_t listener;
26 } s_gras_msg_listener_t;
28 static void listener_function(void *p)
30 gras_msg_listener_t me = (gras_msg_listener_t) p;
33 gras_msgtype_t msg_wakeup_listener_t =
34 gras_msgtype_by_name("_wakeup_listener");
35 DEBUG0("I'm the listener");
38 msg.expe = gras_trp_select(-1);
39 DEBUG0("Select returned something");
40 gras_msg_recv(msg.expe, &msg);
41 if (msg.type != msg_wakeup_listener_t)
42 xbt_queue_push(me->incomming_messages, &msg);
44 char got = *(char *) msg.payl;
46 VERB0("Asked to get awake");
49 VERB0("Asked to die");
50 // gras_socket_close(me->wakeup_sock_listener_side);
55 /* empty the list of sockets to trash */
59 xbt_queue_shift_timed(me->socks_to_close, &sock, 0);
60 if (tcp_close(sock) < 0) {
62 WARN2("error while closing tcp socket %d: %d (%s)\n", sock, sock_errno);
64 WARN3("error while closing tcp socket %d: %d (%s)\n",
65 sock, sock_errno, sock_errstr(sock_errno));
71 if (e.category != timeout_error)
78 gras_msg_listener_t gras_msg_listener_launch(xbt_queue_t msg_exchange)
80 gras_msg_listener_t arg = xbt_new0(s_gras_msg_listener_t, 1);
83 DEBUG0("Launch listener");
84 arg->incomming_messages = msg_exchange;
85 arg->socks_to_close = xbt_queue_new(0, sizeof(int));
87 /* get a free socket for the receiving part of the listener, taking care that it does not get saved as "myport" number */
89 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport;
90 arg->wakeup_sock_listener_side =
91 gras_socket_server_range(5000, 6000, -1, 0);
92 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport =
94 /* Connect the other part of the socket */
95 arg->wakeup_sock_master_side =
96 gras_socket_client(gras_os_myname(),
97 gras_socket_my_port(arg->wakeup_sock_listener_side));
99 /* declare the message used to awake the listener from the master */
100 gras_msgtype_declare("_wakeup_listener", gras_datadesc_by_name("char"));
102 /* actually start the thread */
103 arg->listener = xbt_thread_create("listener", listener_function, arg,1/*joinable*/);
104 gras_os_sleep(0); /* TODO: useless? give the listener a chance to initialize even if the main is empty and we cancel it right afterward */
108 #include "gras/Virtu/virtu_private.h" /* procdata_t content */
109 void gras_msg_listener_shutdown()
111 gras_procdata_t *pd = gras_procdata_get();
113 DEBUG0("Listener quit");
116 gras_msg_send(pd->listener->wakeup_sock_master_side, "_wakeup_listener",
119 xbt_thread_join(pd->listener->listener);
121 // gras_socket_close(pd->listener->wakeup_sock_master_side); FIXME: uncommenting this leads to deadlock at terminaison
122 xbt_queue_free(&pd->listener->incomming_messages);
123 xbt_queue_free(&pd->listener->socks_to_close);
124 xbt_free(pd->listener);
127 void gras_msg_listener_awake()
132 DEBUG0("Awaking the listener");
133 pd = gras_procdata_get();
135 gras_msg_send(pd->listener->wakeup_sock_master_side, "_wakeup_listener",
140 void gras_msg_listener_close_socket(int sd)
142 gras_procdata_t *pd = gras_procdata_get();
144 xbt_queue_push(pd->listener->socks_to_close, &sd);
145 gras_msg_listener_awake();