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/*
* Copyright (C) 2012-2017 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.
*/
#pragma once
#include "JSRunLoopTimer.h"
namespace JSC {
class Heap;
class BlockDirectory;
class IncrementalSweeper final : public JSRunLoopTimer {
public:
using Base = JSRunLoopTimer;
JS_EXPORT_PRIVATE explicit IncrementalSweeper(Heap*);
JS_EXPORT_PRIVATE void startSweeping(Heap&);
void doWorkUntil(VM&, MonotonicTime deadline);
void doWork(VM&) final;
void stopSweeping();
private:
enum class SweepTrigger : bool { Timer, OpportunisticTask };
bool sweepNextBlock(VM&, SweepTrigger);
void doSweep(VM&, MonotonicTime startTime, SweepTrigger);
void scheduleTimer();
BlockDirectory* m_currentDirectory;
bool m_lastOpportunisticTaskDidFinishSweeping { false };
};
} // namespace JSC
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