runtime/StructureChain.h

   1 /*
   2  * Copyright (C) 2008 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 COMPUTER, 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 COMPUTER, 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 StructureChain_h
  27 #define StructureChain_h
  28
  29 #include "JSCell.h"
  30 #include "Structure.h"
  31
  32 #include <wtf/OwnArrayPtr.h>
  33 #include <wtf/PassRefPtr.h>
  34 #include <wtf/RefCounted.h>
  35 #include <wtf/RefPtr.h>
  36
  37 namespace JSC {
  38
  39     class Structure;
  40
  41     class StructureChain : public JSCell {
  42         friend class JIT;
  43
  44     public:
  45         static StructureChain* create(JSGlobalData& globalData, Structure* head) { return new (&globalData) StructureChain(globalData, globalData.structureChainStructure.get(), head); }
  46         WriteBarrier<Structure>* head() { return m_vector.get(); }
  47         void visitChildren(SlotVisitor&);
  48
  49         static Structure* createStructure(JSGlobalData& globalData, JSValue prototype) { return Structure::create(globalData, prototype, TypeInfo(CompoundType, OverridesVisitChildren), 0, &s_info); }
  50
  51         static ClassInfo s_info;
  52
  53     private:
  54         StructureChain(JSGlobalData&, Structure*, Structure* head);
  55         ~StructureChain();
  56         OwnArrayPtr<WriteBarrier<Structure> > m_vector;
  57     };
  58
  59 } // namespace JSC
  60
  61 #endif // StructureChain_h