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/Vector.h>
  31
  32 namespace JSC {
  33
  34 class Heap;
  35 class MarkedBlock;
  36
  37 class IncrementalSweeper : public HeapTimer {
  38     WTF_MAKE_FAST_ALLOCATED;
  39 public:
  40 #if USE(CF)
  41     JS_EXPORT_PRIVATE IncrementalSweeper(Heap*, CFRunLoopRef);
  42 #else
  43     explicit IncrementalSweeper(VM*);
  44 #endif
  45
  46     void startSweeping();
  47
  48     JS_EXPORT_PRIVATE virtual void doWork() override;
  49     bool sweepNextBlock();
  50     void willFinishSweeping();
  51
  52 #if USE(CF)
  53 private:
  54     void doSweep(double startTime);
  55     void scheduleTimer();
  56     void cancelTimer();
  57
  58     Vector<MarkedBlock*>& m_blocksToSweep;
  59 #endif
  60 };
  61
  62 } // namespace JSC
  63
  64 #endif