1 /*
2 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 */
26
27 #include "config.h"
28 #include "core/frame/SuspendableTimer.h"
29
30 namespace WebCore {
31
SuspendableTimer(ExecutionContext * context)32 SuspendableTimer::SuspendableTimer(ExecutionContext* context)
33 : ActiveDOMObject(context)
34 , m_nextFireInterval(0)
35 , m_repeatInterval(0)
36 , m_active(false)
37 #if !ASSERT_DISABLED
38 , m_suspended(false)
39 #endif
40 {
41 }
42
~SuspendableTimer()43 SuspendableTimer::~SuspendableTimer()
44 {
45 }
46
hasPendingActivity() const47 bool SuspendableTimer::hasPendingActivity() const
48 {
49 return isActive();
50 }
51
stop()52 void SuspendableTimer::stop()
53 {
54 TimerBase::stop();
55 }
56
suspend()57 void SuspendableTimer::suspend()
58 {
59 #if !ASSERT_DISABLED
60 ASSERT(!m_suspended);
61 m_suspended = true;
62 #endif
63 m_active = isActive();
64 if (m_active) {
65 m_nextFireInterval = nextUnalignedFireInterval();
66 m_repeatInterval = repeatInterval();
67 TimerBase::stop();
68 }
69 }
70
resume()71 void SuspendableTimer::resume()
72 {
73 #if !ASSERT_DISABLED
74 ASSERT(m_suspended);
75 m_suspended = false;
76 #endif
77 if (m_active)
78 start(m_nextFireInterval, m_repeatInterval);
79 }
80
81 } // namespace WebCore
82