heap/GCIncomingRefCountedSet.h

   1 /*
   2  * Copyright (C) 2013 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 GCIncomingRefCountedSet_h
  27 #define GCIncomingRefCountedSet_h
  28
  29 #include "GCIncomingRefCounted.h"
  30
  31 namespace JSC {
  32
  33 // T = some subtype of GCIncomingRefCounted, must support a gcSizeEstimateInBytes()
  34 // method.
  35 template<typename T>
  36 class GCIncomingRefCountedSet {
  37 public:
  38     GCIncomingRefCountedSet();
  39     ~GCIncomingRefCountedSet();
  40
  41     // Returns true if the native object is new to this set.
  42     bool addReference(JSCell*, T*);
  43
  44     void sweep();
  45
  46     size_t size() const { return m_bytes; };
  47
  48 private:
  49     static bool removeAll(JSCell*);
  50     static bool removeDead(JSCell*);
  51
  52     Vector<T*> m_vector;
  53     size_t m_bytes;
  54 };
  55
  56 } // namespace JSC
  57
  58 #endif // GCIncomingRefCountedSet_h
  59