2 * Copyright (C) 2012 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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.
26 #ifndef IncrementalSweeper_h
27 #define IncrementalSweeper_h
29 #include "HeapTimer.h"
30 #include "MarkedBlock.h"
31 #include <wtf/HashSet.h>
32 #include <wtf/PassOwnPtr.h>
33 #include <wtf/RetainPtr.h>
34 #include <wtf/Vector.h>
40 struct CopyFunctor : public MarkedBlock::VoidFunctor {
41 CopyFunctor(Vector<MarkedBlock*>& blocks)
47 void operator()(MarkedBlock* block) { m_blocks[m_index++] = block; }
50 Vector<MarkedBlock*>& m_blocks;
53 class IncrementalSweeper : public HeapTimer {
55 static IncrementalSweeper* create(Heap*);
56 void startSweeping(const HashSet<MarkedBlock*>& blockSnapshot);
57 virtual void doWork();
58 void sweepNextBlock();
59 bool structuresCanBeSwept();
60 void willFinishSweeping();
64 IncrementalSweeper(Heap*, CFRunLoopRef);
66 void doSweep(double startTime);
70 unsigned m_currentBlockToSweepIndex;
71 Vector<MarkedBlock*> m_blocksToSweep;
74 IncrementalSweeper(JSGlobalData*);
77 bool m_structuresCanBeSwept;