1/*
2 * Copyright (C) 2010, 2012 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "RunLoop.h"
28
29#include <CoreFoundation/CoreFoundation.h>
30#include <dispatch/dispatch.h>
31#include <wtf/AutodrainedPool.h>
32
33namespace WebCore {
34
35void RunLoop::performWork(void* context)
36{
37    AutodrainedPool pool;
38    static_cast<RunLoop*>(context)->performWork();
39}
40
41RunLoop::RunLoop()
42    : m_runLoop(CFRunLoopGetCurrent())
43    , m_nestingLevel(0)
44{
45    CFRunLoopSourceContext context = { 0, this, 0, 0, 0, 0, 0, 0, 0, performWork };
46    m_runLoopSource = adoptCF(CFRunLoopSourceCreate(kCFAllocatorDefault, 0, &context));
47    CFRunLoopAddSource(m_runLoop.get(), m_runLoopSource.get(), kCFRunLoopCommonModes);
48}
49
50RunLoop::~RunLoop()
51{
52    CFRunLoopSourceInvalidate(m_runLoopSource.get());
53}
54
55void RunLoop::runForDuration(double duration)
56{
57    CFRunLoopRunInMode(kCFRunLoopDefaultMode, duration, true);
58}
59
60void RunLoop::wakeUp()
61{
62    CFRunLoopSourceSignal(m_runLoopSource.get());
63    CFRunLoopWakeUp(m_runLoop.get());
64}
65
66#if !PLATFORM(MAC) || PLATFORM(IOS)
67void RunLoop::run()
68{
69    current()->m_nestingLevel++;
70
71    {
72        AutodrainedPool pool;
73        CFRunLoopRun();
74    }
75
76    current()->m_nestingLevel--;
77}
78
79void RunLoop::stop()
80{
81    ASSERT(m_runLoop == CFRunLoopGetCurrent());
82    CFRunLoopStop(m_runLoop.get());
83}
84#endif
85
86// RunLoop::Timer
87
88void RunLoop::TimerBase::timerFired(CFRunLoopTimerRef, void* context)
89{
90    TimerBase* timer = static_cast<TimerBase*>(context);
91
92    AutodrainedPool pool;
93    timer->fired();
94}
95
96RunLoop::TimerBase::TimerBase(RunLoop* runLoop)
97    : m_runLoop(runLoop)
98{
99}
100
101RunLoop::TimerBase::~TimerBase()
102{
103    stop();
104}
105
106void RunLoop::TimerBase::start(double nextFireInterval, bool repeat)
107{
108    if (m_timer)
109        stop();
110
111    CFRunLoopTimerContext context = { 0, this, 0, 0, 0 };
112    CFTimeInterval repeatInterval = repeat ? nextFireInterval : 0;
113    m_timer = adoptCF(CFRunLoopTimerCreate(kCFAllocatorDefault, CFAbsoluteTimeGetCurrent() + nextFireInterval, repeatInterval, 0, 0, timerFired, &context));
114    CFRunLoopAddTimer(m_runLoop->m_runLoop.get(), m_timer.get(), kCFRunLoopCommonModes);
115}
116
117void RunLoop::TimerBase::stop()
118{
119    if (!m_timer)
120        return;
121
122    CFRunLoopTimerInvalidate(m_timer.get());
123    m_timer = nullptr;
124}
125
126bool RunLoop::TimerBase::isActive() const
127{
128    return m_timer && CFRunLoopTimerIsValid(m_timer.get());
129}
130
131} // namespace WebCore
132