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Dogcows Code - chaz/openbox/blob - openbox/ping.c
1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
3 client.h for the Openbox window manager
4 Copyright (c) 2006 Mikael Magnusson
5 Copyright (c) 2003-2008 Dana Jansens
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 See the COPYING file for a copy of the GNU General Public License.
28 typedef struct _ObPingTarget
36 static GHashTable
*ping_targets
= NULL
;
37 static GHashTable
*ping_ids
= NULL
;
38 static guint32 ping_next_id
= 1;
40 #define PING_TIMEOUT (G_USEC_PER_SEC * 3)
41 /*! Warn the user after this many PING_TIMEOUT intervals */
42 #define PING_TIMEOUT_WARN 3
44 static void ping_send(ObPingTarget
*t
);
45 static void ping_end(ObClient
*client
, gpointer data
);
46 static gboolean
ping_timeout(gpointer data
);
48 void ping_startup(gboolean reconfigure
)
50 if (reconfigure
) return;
52 ping_targets
= g_hash_table_new(g_direct_hash
, g_int_equal
);
53 ping_ids
= g_hash_table_new(g_direct_hash
, g_int_equal
);
55 /* listen for clients to disappear */
56 client_add_destroy_notify(ping_end
, NULL
);
59 void ping_shutdown(gboolean reconfigure
)
61 if (reconfigure
) return;
63 g_hash_table_unref(ping_targets
);
64 g_hash_table_unref(ping_ids
);
66 client_remove_destroy_notify(ping_end
);
69 void ping_start(struct _ObClient
*client
, ObPingEventHandler h
)
73 g_assert(client
->ping
== TRUE
);
75 /* make sure we're not already pinging it */
76 g_assert(g_hash_table_lookup(ping_targets
, &client
) == NULL
);
78 t
= g_new0(ObPingTarget
, 1);
82 g_hash_table_insert(ping_targets
, &t
->client
, t
);
84 ob_main_loop_timeout_add(ob_main_loop
, PING_TIMEOUT
, ping_timeout
,
85 t
, g_direct_equal
, NULL
);
86 /* act like we just timed out immediately, to start the pinging process
87 now instead of after the first delay */
91 void ping_stop(struct _ObClient
*c
)
96 void ping_got_pong(guint32 id
)
100 if ((t
= g_hash_table_lookup(ping_ids
, &id
))) {
101 /*g_print("-PONG: '%s' (id %u)\n", t->client->title, t->id);*/
102 if (t
->waiting
> PING_TIMEOUT_WARN
) {
103 /* we had notified that they weren't responding, so now we
104 need to notify that they are again */
105 t
->h(t
->client
, FALSE
);
107 t
->waiting
= 0; /* not waiting for a reply anymore */
110 ob_debug("Got PONG with id %u but not waiting for one\n", id
);
113 static void ping_send(ObPingTarget
*t
)
115 /* t->id is 0 when it hasn't been assigned an id ever yet.
116 we can reuse ids when t->waiting == 0, because we won't be getting a
117 pong for that id in the future again. that way for apps that aren't
118 timing out we don't need to remove/add them from/to the hash table */
119 if (t
->id
== 0 || t
->waiting
> 0) {
120 /* pick an id, and reinsert in the hash table with the new id */
121 if (t
->id
) g_hash_table_remove(ping_ids
, &t
->id
);
122 t
->id
= ping_next_id
;
123 if (++ping_next_id
== 0) ++ping_next_id
; /* skip 0 on wraparound */
124 g_hash_table_insert(ping_ids
, &t
->id
, t
);
127 /*g_print("+PING: '%s' (id %u)\n", t->client->title, t->id);*/
128 PROP_MSG_TO(t
->client
->window
, t
->client
->window
, wm_protocols
,
129 prop_atoms
.net_wm_ping
, t
->id
, t
->client
->window
, 0, 0,
133 static gboolean
ping_timeout(gpointer data
)
135 ObPingTarget
*t
= data
;
139 /* if the client hasn't been responding then do something about it */
140 if (t
->waiting
== PING_TIMEOUT_WARN
)
141 t
->h(t
->client
, TRUE
); /* notify that the client isn't responding */
145 return TRUE
; /* repeat */
148 static void ping_end(ObClient
*client
, gpointer data
)
152 t
= g_hash_table_lookup(ping_targets
, &client
);
155 g_hash_table_remove(ping_targets
, &t
->client
);
156 g_hash_table_remove(ping_ids
, &t
->id
);
158 ob_main_loop_timeout_remove_data(ob_main_loop
, ping_timeout
, t
, FALSE
);
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