JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / heap / HeapTimer.cpp

diff --git a/heap/HeapTimer.cpp b/heap/HeapTimer.cpp
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+++ b/heap/HeapTimer.cpp
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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>
+#elif PLATFORM(EFL)
+#include <Ecore.h>
+#endif
+
+namespace JSC {
+
+#if USE(CF)
+    
+const CFTimeInterval HeapTimer::s_decade = 60 * 60 * 24 * 365 * 10;
+
+static const void* retainAPILock(const void* info)
+{
+    static_cast<JSLock*>(const_cast<void*>(info))->ref();
+    return info;
+}
+
+static void releaseAPILock(const void* info)
+{
+    static_cast<JSLock*>(const_cast<void*>(info))->deref();
+}
+
+HeapTimer::HeapTimer(VM* vm, CFRunLoopRef runLoop)
+    : m_vm(vm)
+    , m_runLoop(runLoop)
+{
+    memset(&m_context, 0, sizeof(CFRunLoopTimerContext));
+    m_context.info = &vm->apiLock();
+    m_context.retain = retainAPILock;
+    m_context.release = releaseAPILock;
+    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::timerDidFire(CFRunLoopTimerRef timer, void* context)
+{
+    JSLock* apiLock = static_cast<JSLock*>(context);
+    apiLock->lock();
+
+    VM* vm = apiLock->vm();
+    // The VM has been destroyed, so we should just give up.
+    if (!vm) {
+        apiLock->unlock();
+        return;
+    }
+
+    HeapTimer* heapTimer = 0;
+#if PLATFORM(IOS)
+    if (vm->heap.activityCallback() && vm->heap.activityCallback()->m_timer.get() == timer)
+        heapTimer = vm->heap.activityCallback();
+#else
+    if (vm->heap.activityCallback()->m_timer.get() == timer)
+        heapTimer = vm->heap.activityCallback();
+#endif // PLATFORM(IOS)
+    else if (vm->heap.sweeper()->m_timer.get() == timer)
+        heapTimer = vm->heap.sweeper();
+    else
+        RELEASE_ASSERT_NOT_REACHED();
+
+    {
+        APIEntryShim shim(vm);
+        heapTimer->doWork();
+    }
+
+    apiLock->unlock();
+}
+
+#elif PLATFORM(BLACKBERRY)
+
+HeapTimer::HeapTimer(VM* vm)
+    : m_vm(vm)
+    , 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::invalidate()
+{
+}
+
+#elif PLATFORM(QT)
+
+HeapTimer::HeapTimer(VM* vm)
+    : m_vm(vm)
+    , 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()
+{
+    QMutexLocker lock(&m_mutex);
+    m_timer.stop();
+}
+
+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_vm);
+    doWork();
+}
+
+void HeapTimer::customEvent(QEvent*)
+{
+    ASSERT(m_newThread);
+    QMutexLocker lock(&m_mutex);
+    moveToThread(m_newThread);
+    m_newThread = 0;
+}
+
+#elif PLATFORM(EFL)
+
+HeapTimer::HeapTimer(VM* vm)
+    : m_vm(vm)
+    , m_timer(0)
+{
+}
+
+HeapTimer::~HeapTimer()
+{
+    stop();
+}
+
+Ecore_Timer* HeapTimer::add(double delay, void* agent)
+{
+    return ecore_timer_add(delay, reinterpret_cast<Ecore_Task_Cb>(timerEvent), agent);
+}
+    
+void HeapTimer::stop()
+{
+    if (!m_timer)
+        return;
+
+    ecore_timer_del(m_timer);
+    m_timer = 0;
+}
+
+bool HeapTimer::timerEvent(void* info)
+{
+    HeapTimer* agent = static_cast<HeapTimer*>(info);
+    
+    APIEntryShim shim(agent->m_vm);
+    agent->doWork();
+    agent->m_timer = 0;
+    
+    return ECORE_CALLBACK_CANCEL;
+}
+
+#else
+HeapTimer::HeapTimer(VM* vm)
+    : m_vm(vm)
+{
+}
+
+HeapTimer::~HeapTimer()
+{
+}
+
+void HeapTimer::invalidate()
+{
+}
+
+#endif
+    
+
+} // namespace JSC