runtime/JSObjectWithGlobalObject.h

   1 /*
   2  * Copyright (C) 2010 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. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef JSObjectWithGlobalObject_h
  27 #define JSObjectWithGlobalObject_h
  28
  29 #include "JSGlobalObject.h"
  30
  31 namespace JSC {
  32
  33 class JSGlobalObject;
  34
  35 class JSObjectWithGlobalObject : public JSNonFinalObject {
  36 public:
  37     static Structure* createStructure(JSGlobalData& globalData, JSValue proto)
  38     {
  39         return Structure::create(globalData, proto, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info);
  40     }
  41
  42     JSGlobalObject* globalObject() const
  43     {
  44         return asGlobalObject((getAnonymousValue(GlobalObjectSlot).asCell()));
  45     }
  46
  47 protected:
  48     JSObjectWithGlobalObject(JSGlobalObject*, Structure*);
  49     JSObjectWithGlobalObject(JSGlobalData&, JSGlobalObject*, Structure*);
  50
  51     JSObjectWithGlobalObject(VPtrStealingHackType)
  52         : JSNonFinalObject(VPtrStealingHack)
  53     {
  54         // Should only be used by JSFunction when we aquire the JSFunction vptr.
  55     }
  56     static const unsigned AnonymousSlotCount = JSObject::AnonymousSlotCount + 1;
  57     static const unsigned GlobalObjectSlot = 0;
  58 };
  59
  60 } // namespace JSC
  61
  62 #endif // JSObjectWithGlobalObject_h