1/*
2 * Copyright (C) 2012-2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "JSRunLoopTimer.h"
29
30namespace JSC {
31
32class Heap;
33class BlockDirectory;
34
35class IncrementalSweeper : public JSRunLoopTimer {
36public:
37 using Base = JSRunLoopTimer;
38 JS_EXPORT_PRIVATE explicit IncrementalSweeper(Heap*);
39
40 JS_EXPORT_PRIVATE void startSweeping(Heap&);
41 void freeFastMallocMemoryAfterSweeping() { m_shouldFreeFastMallocMemoryAfterSweeping = true; }
42
43 void doWork(VM&) override;
44 void stopSweeping();
45
46private:
47 bool sweepNextBlock(VM&);
48 void doSweep(VM&, MonotonicTime startTime);
49 void scheduleTimer();
50
51 BlockDirectory* m_currentDirectory;
52 bool m_shouldFreeFastMallocMemoryAfterSweeping { false };
53};
54
55} // namespace JSC
56