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 "SuspendableTimer.h"
29
30#include "ScriptExecutionContext.h"
31
32namespace WebCore {
33
34SuspendableTimer::SuspendableTimer(ScriptExecutionContext* context)
35    : ActiveDOMObject(context)
36    , m_nextFireInterval(0)
37    , m_repeatInterval(0)
38    , m_active(false)
39#if !ASSERT_DISABLED
40    , m_suspended(false)
41#endif
42{
43}
44
45SuspendableTimer::~SuspendableTimer()
46{
47}
48
49bool SuspendableTimer::hasPendingActivity() const
50{
51    return isActive();
52}
53
54void SuspendableTimer::stop()
55{
56    TimerBase::stop();
57}
58
59void SuspendableTimer::suspend(ReasonForSuspension)
60{
61#if !ASSERT_DISABLED
62    ASSERT(!m_suspended);
63    m_suspended = true;
64#endif
65    m_active = isActive();
66    if (m_active) {
67        m_nextFireInterval = nextUnalignedFireInterval();
68        m_repeatInterval = repeatInterval();
69        TimerBase::stop();
70    }
71}
72
73void SuspendableTimer::resume()
74{
75#if !ASSERT_DISABLED
76    ASSERT(m_suspended);
77    m_suspended = false;
78#endif
79    if (m_active)
80        start(m_nextFireInterval, m_repeatInterval);
81}
82
83bool SuspendableTimer::canSuspend() const
84{
85    return true;
86}
87
88} // namespace WebCore
89