1/*
2 * Copyright (C) 2012 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#ifndef IncrementalSweeper_h
27#define IncrementalSweeper_h
28
29#include "HeapTimer.h"
30#include <wtf/PassOwnPtr.h>
31#include <wtf/Vector.h>
32
33namespace JSC {
34
35class Heap;
36class MarkedBlock;
37
38class IncrementalSweeper : public HeapTimer {
39public:
40    static PassOwnPtr<IncrementalSweeper> create(Heap*);
41    void startSweeping(Vector<MarkedBlock*>&);
42    JS_EXPORT_PRIVATE virtual void doWork() override;
43    void sweepNextBlock();
44    void willFinishSweeping();
45
46protected:
47#if USE(CF)
48    JS_EXPORT_PRIVATE IncrementalSweeper(Heap*, CFRunLoopRef);
49#else
50    IncrementalSweeper(VM*);
51#endif
52
53#if USE(CF)
54private:
55    void doSweep(double startTime);
56    void scheduleTimer();
57    void cancelTimer();
58
59    unsigned m_currentBlockToSweepIndex;
60    Vector<MarkedBlock*>& m_blocksToSweep;
61#endif
62};
63
64} // namespace JSC
65
66#endif
67