heap/GCIncomingRefCountedSetInlines.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 GCIncomingRefCountedSetInlines_h
  27 #define GCIncomingRefCountedSetInlines_h
  28
  29 #include "GCIncomingRefCountedSet.h"
  30 #include "VM.h"
  31
  32 namespace JSC {
  33
  34 template<typename T>
  35 GCIncomingRefCountedSet<T>::GCIncomingRefCountedSet()
  36     : m_bytes(0)
  37 {
  38 }
  39
  40 template<typename T>
  41 GCIncomingRefCountedSet<T>::~GCIncomingRefCountedSet()
  42 {
  43     for (size_t i = m_vector.size(); i--;)
  44         m_vector[i]->filterIncomingReferences(removeAll);
  45 }
  46
  47 template<typename T>
  48 bool GCIncomingRefCountedSet<T>::addReference(JSCell* cell, T* object)
  49 {
  50     if (!object->addIncomingReference(cell)) {
  51         ASSERT(object->isDeferred());
  52         ASSERT(object->numberOfIncomingReferences());
  53         return false;
  54     }
  55     m_vector.append(object);
  56     m_bytes += object->gcSizeEstimateInBytes();
  57     ASSERT(object->isDeferred());
  58     ASSERT(object->numberOfIncomingReferences());
  59     return true;
  60 }
  61
  62 template<typename T>
  63 void GCIncomingRefCountedSet<T>::sweep()
  64 {
  65     for (size_t i = 0; i < m_vector.size(); ++i) {
  66         T* object = m_vector[i];
  67         size_t size = object->gcSizeEstimateInBytes();
  68         ASSERT(object->isDeferred());
  69         ASSERT(object->numberOfIncomingReferences());
  70         if (!object->filterIncomingReferences(removeDead))
  71             continue;
  72         m_bytes -= size;
  73         m_vector[i--] = m_vector.last();
  74         m_vector.removeLast();
  75     }
  76 }
  77
  78 template<typename T>
  79 bool GCIncomingRefCountedSet<T>::removeAll(JSCell*)
  80 {
  81     return false;
  82 }
  83
  84 template<typename T>
  85 bool GCIncomingRefCountedSet<T>::removeDead(JSCell* cell)
  86 {
  87     return Heap::isMarked(cell);
  88 }
  89
  90 } // namespace JSC
  91
  92 #endif // GCIncomingRefCountedSetInlines_h