heap/IncrementalSweeper.h

   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
  33 namespace JSC {
  34
  35 class Heap;
  36 class MarkedBlock;
  37
  38 class IncrementalSweeper : public HeapTimer {
  39 public:
  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
  46 protected:
  47 #if USE(CF)
  48     JS_EXPORT_PRIVATE IncrementalSweeper(Heap*, CFRunLoopRef);
  49 #else
  50     IncrementalSweeper(VM*);
  51 #endif
  52
  53 #if USE(CF)
  54 private:
  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