1 /*
2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
3 * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "config.h"
29 #include "SharedTimer.h"
30
31 #include <wtf/Assertions.h>
32 #include <wtf/CurrentTime.h>
33 #include <glib.h>
34
35 namespace WebCore {
36
37 static guint sharedTimer;
38 static void (*sharedTimerFiredFunction)();
39
setSharedTimerFiredFunction(void (* f)())40 void setSharedTimerFiredFunction(void (*f)())
41 {
42 sharedTimerFiredFunction = f;
43 }
44
timeout_cb(gpointer)45 static gboolean timeout_cb(gpointer)
46 {
47 if (sharedTimerFiredFunction)
48 sharedTimerFiredFunction();
49 return FALSE;
50 }
51
setSharedTimerFireTime(double fireTime)52 void setSharedTimerFireTime(double fireTime)
53 {
54 ASSERT(sharedTimerFiredFunction);
55
56 double interval = fireTime - currentTime();
57 guint intervalInMS;
58 if (interval < 0)
59 intervalInMS = 0;
60 else {
61 interval *= 1000;
62 intervalInMS = (guint)interval;
63 }
64
65 stopSharedTimer();
66 if (intervalInMS == 0)
67 sharedTimer = g_idle_add(timeout_cb, NULL);
68 else
69 sharedTimer = g_timeout_add_full(G_PRIORITY_DEFAULT, intervalInMS, timeout_cb, NULL, NULL);
70 }
71
stopSharedTimer()72 void stopSharedTimer()
73 {
74 gboolean s = FALSE;
75 if (sharedTimer == 0)
76 return;
77
78 s = g_source_remove(sharedTimer);
79 ASSERT(s);
80 sharedTimer = 0;
81 }
82
83 }
84