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/*
* Copyright (C) 2025 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.
*/
#pragma once
#include "CatchScope.h"
#include "Debugger.h"
#include "MicrotaskQueue.h"
namespace JSC {
inline void MicrotaskQueue::performMicrotaskCheckpoint(VM& vm, NOESCAPE const Invocable<QueuedTask::Result(QueuedTask&)> auto& functor)
{
auto catchScope = DECLARE_CATCH_SCOPE(vm);
while (!m_queue.isEmpty()) {
if (vm.executionForbidden()) [[unlikely]] {
clear();
break;
}
auto task = m_queue.dequeue();
auto result = functor(task);
if (!catchScope.clearExceptionExceptTermination()) [[unlikely]] {
clear();
break;
}
vm.callOnEachMicrotaskTick();
if (!catchScope.clearExceptionExceptTermination()) [[unlikely]] {
clear();
break;
}
switch (result) {
case QueuedTask::Result::Executed:
break;
case QueuedTask::Result::Discard:
// Let this task go away.
break;
case QueuedTask::Result::Suspended: {
m_toKeep.enqueue(WTFMove(task));
break;
}
}
}
m_queue.swap(m_toKeep);
}
} // namespace JSC
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