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/*
* Copyright (C) 2010-2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <wtf/RunLoop.h>
#include <CoreFoundation/CoreFoundation.h>
#include <dispatch/dispatch.h>
#include <wtf/AutodrainedPool.h>
#include <wtf/SchedulePair.h>
namespace WTF {
static RetainPtr<CFRunLoopTimerRef> createTimer(Seconds interval, bool repeat, void(*timerFired)(CFRunLoopTimerRef, void*), void* info)
{
CFRunLoopTimerContext context = { 0, info, 0, 0, 0 };
Seconds repeatInterval = repeat ? interval : 0_s;
return adoptCF(CFRunLoopTimerCreate(kCFAllocatorDefault, CFAbsoluteTimeGetCurrent() + interval.seconds(), repeatInterval.seconds(), 0, 0, timerFired, &context));
}
void RunLoop::performWork(void* context)
{
AutodrainedPool pool;
static_cast<RunLoop*>(context)->performWork();
}
RunLoop::RunLoop()
: m_runLoop(CFRunLoopGetCurrent())
{
CFRunLoopSourceContext context = { 0, this, 0, 0, 0, 0, 0, 0, 0, performWork };
m_runLoopSource = adoptCF(CFRunLoopSourceCreate(kCFAllocatorDefault, 0, &context));
CFRunLoopAddSource(m_runLoop.get(), m_runLoopSource.get(), kCFRunLoopCommonModes);
}
RunLoop::~RunLoop()
{
CFRunLoopSourceInvalidate(m_runLoopSource.get());
}
void RunLoop::wakeUp()
{
CFRunLoopSourceSignal(m_runLoopSource.get());
CFRunLoopWakeUp(m_runLoop.get());
}
RunLoop::CycleResult RunLoop::cycle(RunLoopMode mode)
{
CFTimeInterval timeInterval = 0.05;
CFRunLoopRunInMode(mode, timeInterval, true);
return CycleResult::Continue;
}
void RunLoop::run()
{
AutodrainedPool pool;
CFRunLoopRun();
}
void RunLoop::stop()
{
ASSERT(m_runLoop == CFRunLoopGetCurrent());
CFRunLoopStop(m_runLoop.get());
}
void RunLoop::dispatch(const SchedulePairHashSet& schedulePairs, Function<void()>&& function)
{
auto timer = createTimer(0_s, false, [] (CFRunLoopTimerRef timer, void* context) {
AutodrainedPool pool;
CFRunLoopTimerInvalidate(timer);
auto function = adopt(static_cast<Function<void()>::Impl*>(context));
function();
}, function.leak());
for (auto& schedulePair : schedulePairs)
CFRunLoopAddTimer(schedulePair->runLoop(), timer.get(), schedulePair->mode());
}
// RunLoop::Timer
RunLoop::TimerBase::TimerBase(RunLoop& runLoop)
: m_runLoop(runLoop)
{
}
RunLoop::TimerBase::~TimerBase()
{
stop();
}
void RunLoop::TimerBase::start(Seconds interval, bool repeat)
{
if (m_timer)
stop();
m_timer = createTimer(interval, repeat, [] (CFRunLoopTimerRef cfTimer, void* context) {
AutodrainedPool pool;
auto timer = static_cast<TimerBase*>(context);
if (!CFRunLoopTimerDoesRepeat(cfTimer))
CFRunLoopTimerInvalidate(cfTimer);
timer->fired();
}, this);
CFRunLoopAddTimer(m_runLoop->m_runLoop.get(), m_timer.get(), kCFRunLoopCommonModes);
}
void RunLoop::TimerBase::stop()
{
if (!m_timer)
return;
CFRunLoopTimerInvalidate(m_timer.get());
m_timer = nullptr;
}
bool RunLoop::TimerBase::isActive() const
{
return m_timer && CFRunLoopTimerIsValid(m_timer.get());
}
Seconds RunLoop::TimerBase::secondsUntilFire() const
{
if (isActive())
return std::max<Seconds>(Seconds { CFRunLoopTimerGetNextFireDate(m_timer.get()) - CFAbsoluteTimeGetCurrent() }, 0_s);
return 0_s;
}
} // namespace WTF