runtime/JSAPIValueWrapper.h

   1 /*
   2  *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
   3  *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
   4  *  Copyright (C) 2003, 2004, 2005, 2007, 2008 Apple Inc. All rights reserved.
   5  *
   6  *  This library is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU Library General Public
   8  *  License as published by the Free Software Foundation; either
   9  *  version 2 of the License, or (at your option) any later version.
  10  *
  11  *  This library is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *  Library General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU Library General Public License
  17  *  along with this library; see the file COPYING.LIB.  If not, write to
  18  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  *  Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #ifndef JSAPIValueWrapper_h
  24 #define JSAPIValueWrapper_h
  25
  26 #include "JSCJSValue.h"
  27 #include "JSCell.h"
  28 #include "CallFrame.h"
  29 #include "Structure.h"
  30
  31 namespace JSC {
  32
  33     class JSAPIValueWrapper : public JSCell {
  34         friend JSValue jsAPIValueWrapper(ExecState*, JSValue);
  35     public:
  36         typedef JSCell Base;
  37
  38         JSValue value() const { return m_value.get(); }
  39
  40         static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
  41         {
  42             return Structure::create(vm, globalObject, prototype, TypeInfo(APIValueWrapperType, OverridesVisitChildren | OverridesGetPropertyNames), &s_info);
  43         }
  44
  45         static JS_EXPORTDATA const ClassInfo s_info;
  46
  47         static JSAPIValueWrapper* create(ExecState* exec, JSValue value)
  48         {
  49             JSAPIValueWrapper* wrapper = new (NotNull, allocateCell<JSAPIValueWrapper>(*exec->heap())) JSAPIValueWrapper(exec);
  50             wrapper->finishCreation(exec, value);
  51             return wrapper;
  52         }
  53
  54     protected:
  55         void finishCreation(ExecState* exec, JSValue value)
  56         {
  57             Base::finishCreation(exec->vm());
  58             m_value.set(exec->vm(), this, value);
  59             ASSERT(!value.isCell());
  60         }
  61
  62     private:
  63         JSAPIValueWrapper(ExecState* exec)
  64             : JSCell(exec->vm(), exec->vm().apiWrapperStructure.get())
  65         {
  66         }
  67
  68         WriteBarrier<Unknown> m_value;
  69     };
  70
  71     inline JSValue jsAPIValueWrapper(ExecState* exec, JSValue value)
  72     {
  73         return JSAPIValueWrapper::create(exec, value);
  74     }
  75
  76 } // namespace JSC
  77
  78 #endif // JSAPIValueWrapper_h