blob: 78f02c6cb967f7f31417e63d896bdf8d9a5608b1 [file] [log] [blame]
/*
* Copyright (C) 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. ``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 "SuspendableTaskQueue.h"
#include "Document.h"
namespace WebCore {
SuspendableTaskQueue::SuspendableTaskQueue(ScriptExecutionContext* context)
: ActiveDOMObject(context)
, m_taskQueue(context)
, m_isClosed(!context)
{
}
SuspendableTaskQueue::SuspendableTaskQueue(Document& document)
: ActiveDOMObject(document)
, m_taskQueue(document)
{
}
void SuspendableTaskQueue::close()
{
m_isClosed = true;
cancelAllTasks();
}
void SuspendableTaskQueue::cancelAllTasks()
{
m_taskQueue.cancelAllTasks();
m_pendingTasks.clear();
}
void SuspendableTaskQueue::enqueueTask(TaskFunction&& task)
{
if (m_isClosed)
return;
m_pendingTasks.append(WTFMove(task));
if (m_isSuspended)
return;
m_taskQueue.enqueueTask(std::bind(&SuspendableTaskQueue::runOneTask, this));
}
void SuspendableTaskQueue::runOneTask()
{
ASSERT(!m_pendingTasks.isEmpty());
auto task = m_pendingTasks.takeFirst();
task();
}
const char* SuspendableTaskQueue::activeDOMObjectName() const
{
return "SuspendableTaskQueue";
}
bool SuspendableTaskQueue::canSuspendForDocumentSuspension() const
{
return true;
}
void SuspendableTaskQueue::stop()
{
close();
}
void SuspendableTaskQueue::suspend(ReasonForSuspension)
{
m_isSuspended = true;
m_taskQueue.cancelAllTasks();
}
void SuspendableTaskQueue::resume()
{
m_isSuspended = false;
for (size_t i = 0; i < m_pendingTasks.size(); ++i)
m_taskQueue.enqueueTask(std::bind(&SuspendableTaskQueue::runOneTask, this));
}
} // namespace WebCore