3 /* Thread in charge of listening the network and queuing incoming messages */
5 /* Copyright (c) 2007 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. */
10 #include "gras/Msg/msg_private.h"
11 #include "gras/Transport/transport_private.h"
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_msg_read, gras_msg,
13 "Message reader thread");
16 #include "xbt/queue.h"
17 #include "xbt/synchro.h"
19 #include "gras/Transport/transport_interface.h" /* gras_select */
21 typedef struct s_gras_msg_listener_ {
22 xbt_queue_t incomming_messages;
23 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 */
24 gras_socket_t wakeup_sock_listener_side;
25 gras_socket_t wakeup_sock_master_side;
26 xbt_thread_t listener;
27 } s_gras_msg_listener_t;
29 static void do_close_socket(gras_socket_t sock) {
30 if (sock->plugin->socket_close)
31 (*sock->plugin->socket_close) (sock);
34 free(sock->peer_name);
37 static void listener_function(void *p)
39 gras_msg_listener_t me = (gras_msg_listener_t) p;
42 gras_msgtype_t msg_wakeup_listener_t =
43 gras_msgtype_by_name("_wakeup_listener");
44 DEBUG0("I'm the listener");
47 msg.expe = gras_trp_select(-1);
48 DEBUG0("Select returned something");
49 gras_msg_recv(msg.expe, &msg);
50 if (msg.type != msg_wakeup_listener_t)
51 xbt_queue_push(me->incomming_messages, &msg);
53 char got = *(char *) msg.payl;
55 VERB0("Asked to get awake");
58 VERB0("Asked to die");
59 // gras_socket_close(me->wakeup_sock_listener_side);
64 /* empty the list of sockets to trash */
68 xbt_queue_shift_timed(me->socks_to_close, &sock, 0);
69 do_close_socket(sock);
73 if (e.category != timeout_error)
80 gras_msg_listener_t gras_msg_listener_launch(xbt_queue_t msg_exchange)
82 gras_msg_listener_t arg = xbt_new0(s_gras_msg_listener_t, 1);
85 DEBUG0("Launch listener");
86 arg->incomming_messages = msg_exchange;
87 arg->socks_to_close = xbt_queue_new(0, sizeof(int));
89 /* get a free socket for the receiving part of the listener, taking care that it does not get saved as "myport" number */
91 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport;
92 arg->wakeup_sock_listener_side =
93 gras_socket_server_range(5000, 6000, -1, 0);
94 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport =
96 /* Connect the other part of the socket */
97 arg->wakeup_sock_master_side =
98 gras_socket_client(gras_os_myname(),
99 gras_socket_my_port(arg->wakeup_sock_listener_side));
101 /* declare the message used to awake the listener from the master */
102 gras_msgtype_declare("_wakeup_listener", gras_datadesc_by_name("char"));
104 /* actually start the thread */
105 arg->listener = xbt_thread_create("listener", listener_function, arg,0/*not joinable*/);
106 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 */
110 #include "gras/Virtu/virtu_private.h" /* procdata_t content */
111 void gras_msg_listener_shutdown()
113 gras_procdata_t *pd = gras_procdata_get();
115 DEBUG0("Listener quit");
118 gras_msg_send(pd->listener->wakeup_sock_master_side, "_wakeup_listener",
121 xbt_thread_join(pd->listener->listener);
123 // gras_socket_close(pd->listener->wakeup_sock_master_side); FIXME: uncommenting this leads to deadlock at terminaison
124 xbt_queue_free(&pd->listener->incomming_messages);
125 xbt_queue_free(&pd->listener->socks_to_close);
126 xbt_free(pd->listener);
129 void gras_msg_listener_awake()
134 DEBUG0("Awaking the listener");
135 pd = gras_procdata_get();
137 gras_msg_send(pd->listener->wakeup_sock_master_side, "_wakeup_listener",
142 void gras_msg_listener_close_socket(gras_socket_t sock)
144 gras_procdata_t *pd = gras_procdata_get();
146 xbt_queue_push(pd->listener->socks_to_close, &sock);
147 gras_msg_listener_awake();
150 do_close_socket(sock);