1 /* Thread in charge of listening the network and queuing incoming messages */
3 /* Copyright (c) 2007 Martin Quinson. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #include "gras/Msg/msg_private.h"
9 #include "gras/Transport/transport_private.h"
10 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_msg_read, gras_msg,
11 "Message reader thread");
14 #include "xbt/queue.h"
15 #include "xbt/synchro.h"
17 #include "gras/Transport/transport_interface.h" /* gras_select */
19 typedef struct s_gras_msg_listener_ {
20 xbt_queue_t incomming_messages;
21 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 */
22 gras_socket_t wakeup_sock_listener_side;
23 gras_socket_t wakeup_sock_master_side;
24 xbt_thread_t listener;
25 } s_gras_msg_listener_t;
27 static void listener_function(void *p)
29 gras_msg_listener_t me = (gras_msg_listener_t) p;
32 gras_msgtype_t msg_wakeup_listener_t =
33 gras_msgtype_by_name("_wakeup_listener");
34 DEBUG0("I'm the listener");
37 msg.expe = gras_trp_select(-1);
38 DEBUG0("Select returned something");
39 gras_msg_recv(msg.expe, &msg);
40 if (msg.type != msg_wakeup_listener_t)
41 xbt_queue_push(me->incomming_messages, &msg);
43 char got = *(char *) msg.payl;
45 VERB0("Asked to get awake");
48 VERB0("Asked to die");
49 // gras_socket_close(me->wakeup_sock_listener_side);
54 /* empty the list of sockets to trash */
58 xbt_queue_shift_timed(me->socks_to_close, &sock, 0);
59 if (tcp_close(sock) < 0) {
60 WARN3("error while closing tcp socket %d: %d (%s)\n",
61 sock, sock_errno, sock_errstr(sock_errno));
66 if (e.category != timeout_error)
73 gras_msg_listener_t gras_msg_listener_launch(xbt_queue_t msg_exchange)
75 gras_msg_listener_t arg = xbt_new0(s_gras_msg_listener_t, 1);
78 DEBUG0("Launch listener");
79 arg->incomming_messages = msg_exchange;
80 arg->socks_to_close = xbt_queue_new(0, sizeof(int));
82 /* get a free socket for the receiving part of the listener, taking care that it does not get saved as "myport" number */
84 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport;
85 arg->wakeup_sock_listener_side =
86 gras_socket_server_range(5000, 6000, -1, 0);
87 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport =
89 /* Connect the other part of the socket */
90 arg->wakeup_sock_master_side =
91 gras_socket_client(gras_os_myname(),
92 gras_socket_my_port(arg->wakeup_sock_listener_side));
94 /* declare the message used to awake the listener from the master */
95 gras_msgtype_declare("_wakeup_listener", gras_datadesc_by_name("char"));
97 /* actually start the thread */
98 arg->listener = xbt_thread_create("listener", listener_function, arg,1/*joinable*/);
99 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 */
103 #include "gras/Virtu/virtu_private.h" /* procdata_t content */
104 void gras_msg_listener_shutdown()
106 gras_procdata_t *pd = gras_procdata_get();
108 DEBUG0("Listener quit");
111 gras_msg_send(pd->listener->wakeup_sock_master_side, "_wakeup_listener",
114 xbt_thread_join(pd->listener->listener);
116 // gras_socket_close(pd->listener->wakeup_sock_master_side); FIXME: uncommenting this leads to deadlock at terminaison
117 xbt_queue_free(&pd->listener->incomming_messages);
118 xbt_queue_free(&pd->listener->socks_to_close);
119 xbt_free(pd->listener);
122 void gras_msg_listener_awake()
127 DEBUG0("Awaking the listener");
128 pd = gras_procdata_get();
130 gras_msg_send(pd->listener->wakeup_sock_master_side, "_wakeup_listener",
135 void gras_msg_listener_close_socket(int sd)
137 gras_procdata_t *pd = gras_procdata_get();
139 xbt_queue_push(pd->listener->socks_to_close, &sd);
140 gras_msg_listener_awake();