runtime/JSGlobalThis.h

   1 /*
   2  * Copyright (C) 2011 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 JSGlobalThis_h
  27 #define JSGlobalThis_h
  28
  29 #include "JSObject.h"
  30
  31 namespace JSC {
  32
  33 class JSGlobalThis : public JSNonFinalObject {
  34 public:
  35     typedef JSNonFinalObject Base;
  36
  37     static JSGlobalThis* create(JSGlobalData& globalData, Structure* structure)
  38     {
  39         JSGlobalThis* globalThis = new (NotNull, allocateCell<JSGlobalThis>(globalData.heap)) JSGlobalThis(globalData, structure);
  40         globalThis->finishCreation(globalData);
  41         return globalThis;
  42     }
  43
  44     static Structure* createStructure(JSGlobalData& globalData, JSValue prototype)
  45     {
  46         return Structure::create(globalData, 0, prototype, TypeInfo(GlobalThisType, StructureFlags), &s_info);
  47     }
  48
  49     static JS_EXPORTDATA const JSC::ClassInfo s_info;
  50
  51     JSGlobalObject* unwrappedObject() const { return m_unwrappedObject.get(); }
  52
  53 protected:
  54     JSGlobalThis(JSGlobalData& globalData, Structure* structure)
  55         : JSNonFinalObject(globalData, structure)
  56     {
  57     }
  58
  59     void finishCreation(JSGlobalData& globalData)
  60     {
  61         Base::finishCreation(globalData);
  62     }
  63
  64     static const unsigned StructureFlags = OverridesVisitChildren | Base::StructureFlags;
  65
  66     JS_EXPORT_PRIVATE static void visitChildren(JSCell*, SlotVisitor&);
  67
  68     JS_EXPORT_PRIVATE void setUnwrappedObject(JSGlobalData&, JSGlobalObject*);
  69
  70 private:
  71     WriteBarrier<JSGlobalObject> m_unwrappedObject;
  72 };
  73
  74 } // namespace JSC
  75
  76 #endif // JSGlobalThis_h