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/*
* Copyright (C) 2012 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. ``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
* 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 "HeapTimer.h"
#include "APIShims.h"
#include "JSObject.h"
#include "JSString.h"
#include <wtf/MainThread.h>
#include <wtf/Threading.h>
#if PLATFORM(QT)
#include <QCoreApplication>
#include <QMutexLocker>
#include <QThread>
#include <QTimerEvent>
#endif
namespace JSC {
#if USE(CF)
const CFTimeInterval HeapTimer::s_decade = 60 * 60 * 24 * 365 * 10;
HeapTimer::HeapTimer(JSGlobalData* globalData, CFRunLoopRef runLoop)
: m_globalData(globalData)
, m_runLoop(runLoop)
{
memset(&m_context, 0, sizeof(CFRunLoopTimerContext));
m_context.info = this;
m_timer.adoptCF(CFRunLoopTimerCreate(0, s_decade, s_decade, 0, 0, HeapTimer::timerDidFire, &m_context));
CFRunLoopAddTimer(m_runLoop.get(), m_timer.get(), kCFRunLoopCommonModes);
}
HeapTimer::~HeapTimer()
{
CFRunLoopRemoveTimer(m_runLoop.get(), m_timer.get(), kCFRunLoopCommonModes);
CFRunLoopTimerInvalidate(m_timer.get());
}
void HeapTimer::synchronize()
{
if (CFRunLoopGetCurrent() == m_runLoop.get())
return;
CFRunLoopRemoveTimer(m_runLoop.get(), m_timer.get(), kCFRunLoopCommonModes);
m_runLoop = CFRunLoopGetCurrent();
CFRunLoopAddTimer(m_runLoop.get(), m_timer.get(), kCFRunLoopCommonModes);
}
void HeapTimer::invalidate()
{
m_globalData = 0;
CFRunLoopTimerSetNextFireDate(m_timer.get(), CFAbsoluteTimeGetCurrent() - s_decade);
}
void HeapTimer::didStartVMShutdown()
{
if (CFRunLoopGetCurrent() == m_runLoop.get()) {
invalidate();
delete this;
return;
}
ASSERT(!m_globalData->apiLock().currentThreadIsHoldingLock());
MutexLocker locker(m_shutdownMutex);
invalidate();
}
void HeapTimer::timerDidFire(CFRunLoopTimerRef, void* info)
{
HeapTimer* agent = static_cast<HeapTimer*>(info);
agent->m_shutdownMutex.lock();
if (!agent->m_globalData) {
agent->m_shutdownMutex.unlock();
delete agent;
return;
}
{
// We don't ref here to prevent us from resurrecting the ref count of a "dead" JSGlobalData.
APIEntryShim shim(agent->m_globalData, APIEntryShimWithoutLock::DontRefGlobalData);
agent->doWork();
}
agent->m_shutdownMutex.unlock();
}
#elif PLATFORM(BLACKBERRY)
HeapTimer::HeapTimer(JSGlobalData* globalData)
: m_globalData(globalData)
, m_timer(this, &HeapTimer::timerDidFire)
{
// FIXME: Implement HeapTimer for other threads.
if (WTF::isMainThread() && !m_timer.tryCreateClient())
CRASH();
}
HeapTimer::~HeapTimer()
{
}
void HeapTimer::timerDidFire()
{
doWork();
}
void HeapTimer::synchronize()
{
}
void HeapTimer::invalidate()
{
}
void HeapTimer::didStartVMShutdown()
{
delete this;
}
#elif PLATFORM(QT)
HeapTimer::HeapTimer(JSGlobalData* globalData)
: m_globalData(globalData)
, m_newThread(0)
, m_mutex(QMutex::NonRecursive)
{
// The HeapTimer might be created before the runLoop is started,
// but we need to ensure the thread has an eventDispatcher already.
QEventLoop fakeLoop(this);
}
HeapTimer::~HeapTimer()
{
}
void HeapTimer::timerEvent(QTimerEvent*)
{
QMutexLocker lock(&m_mutex);
if (m_newThread) {
// We need to wait with processing until we are on the right thread.
return;
}
APIEntryShim shim(m_globalData, APIEntryShimWithoutLock::DontRefGlobalData);
doWork();
}
void HeapTimer::customEvent(QEvent*)
{
ASSERT(m_newThread);
QMutexLocker lock(&m_mutex);
moveToThread(m_newThread);
m_newThread = 0;
}
void HeapTimer::synchronize()
{
if (thread() != QThread::currentThread()) {
// We can only move from the objects own thread to another, so we fire an
// event into the owning thread to trigger the move.
// This must be processed before any timerEvents so giving it high priority.
QMutexLocker lock(&m_mutex);
m_newThread = QThread::currentThread();
QCoreApplication::postEvent(this, new QEvent(QEvent::User), Qt::HighEventPriority);
}
}
void HeapTimer::invalidate()
{
QMutexLocker lock(&m_mutex);
m_timer.stop();
}
void HeapTimer::didStartVMShutdown()
{
invalidate();
if (thread() == QThread::currentThread())
delete this;
else
deleteLater();
}
#else
HeapTimer::HeapTimer(JSGlobalData* globalData)
: m_globalData(globalData)
{
}
HeapTimer::~HeapTimer()
{
}
void HeapTimer::didStartVMShutdown()
{
delete this;
}
void HeapTimer::synchronize()
{
}
void HeapTimer::invalidate()
{
}
#endif
} // namespace JSC
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