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/*
* Copyright (C) 2013 Google 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 COMPUTER, 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 COMPUTER, 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 "core/dom/MainThreadTaskRunner.h"
#include "core/dom/ExecutionContext.h"
#include "core/dom/ExecutionContextTask.h"
#include "core/inspector/InspectorInstrumentation.h"
#include "platform/ThreadSafeFunctional.h"
#include "public/platform/Platform.h"
#include "wtf/Assertions.h"
namespace blink {
MainThreadTaskRunner::MainThreadTaskRunner(ExecutionContext* context)
: m_context(context)
#if !ENABLE(OILPAN)
, m_weakFactory(this)
#endif
, m_pendingTasksTimer(this, &MainThreadTaskRunner::pendingTasksTimerFired)
, m_suspended(false)
{
}
MainThreadTaskRunner::~MainThreadTaskRunner()
{
}
DEFINE_TRACE(MainThreadTaskRunner)
{
visitor->trace(m_context);
}
void MainThreadTaskRunner::postTaskInternal(const WebTraceLocation& location, PassOwnPtr<ExecutionContextTask> task, bool isInspectorTask)
{
Platform::current()->mainThread()->getWebTaskRunner()->postTask(location, threadSafeBind(
&MainThreadTaskRunner::perform,
#if ENABLE(OILPAN)
CrossThreadWeakPersistentThisPointer<MainThreadTaskRunner>(this),
#else
AllowCrossThreadAccess(m_weakFactory.createWeakPtr()),
#endif
task,
isInspectorTask));
}
void MainThreadTaskRunner::postTask(const WebTraceLocation& location, PassOwnPtr<ExecutionContextTask> task)
{
if (!task->taskNameForInstrumentation().isEmpty())
InspectorInstrumentation::didPostExecutionContextTask(m_context, task.get());
postTaskInternal(location, task, false);
}
void MainThreadTaskRunner::postInspectorTask(const WebTraceLocation& location, PassOwnPtr<ExecutionContextTask> task)
{
postTaskInternal(location, task, true);
}
void MainThreadTaskRunner::perform(PassOwnPtr<ExecutionContextTask> task, bool isInspectorTask)
{
if (!isInspectorTask && (m_context->tasksNeedSuspension() || !m_pendingTasks.isEmpty())) {
m_pendingTasks.append(task);
return;
}
const bool instrumenting = !isInspectorTask && !task->taskNameForInstrumentation().isEmpty();
if (instrumenting)
InspectorInstrumentation::willPerformExecutionContextTask(m_context, task.get());
task->performTask(m_context);
if (instrumenting)
InspectorInstrumentation::didPerformExecutionContextTask(m_context);
}
void MainThreadTaskRunner::suspend()
{
ASSERT(!m_suspended);
m_pendingTasksTimer.stop();
m_suspended = true;
}
void MainThreadTaskRunner::resume()
{
ASSERT(m_suspended);
if (!m_pendingTasks.isEmpty())
m_pendingTasksTimer.startOneShot(0, BLINK_FROM_HERE);
m_suspended = false;
}
void MainThreadTaskRunner::pendingTasksTimerFired(Timer<MainThreadTaskRunner>*)
{
while (!m_pendingTasks.isEmpty()) {
OwnPtr<ExecutionContextTask> task = m_pendingTasks[0].release();
m_pendingTasks.remove(0);
const bool instrumenting = !task->taskNameForInstrumentation().isEmpty();
if (instrumenting)
InspectorInstrumentation::willPerformExecutionContextTask(m_context, task.get());
task->performTask(m_context);
if (instrumenting)
InspectorInstrumentation::didPerformExecutionContextTask(m_context);
}
}
} // namespace blink
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