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), info());
  43         }
  44
  45         DECLARE_EXPORT_INFO;
  46
  47         static JSAPIValueWrapper* create(ExecState* exec, JSValue value)
  48         {
  49             VM& vm = exec->vm();
  50             JSAPIValueWrapper* wrapper = new (NotNull, allocateCell<JSAPIValueWrapper>(vm.heap)) JSAPIValueWrapper(exec);
  51             wrapper->finishCreation(vm, value);
  52             return wrapper;
  53         }
  54
  55     protected:
  56         void finishCreation(VM& vm, JSValue value)
  57         {
  58             Base::finishCreation(vm);
  59             m_value.set(vm, this, value);
  60             ASSERT(!value.isCell());
  61         }
  62
  63     private:
  64         JSAPIValueWrapper(ExecState* exec)
  65             : JSCell(exec->vm(), exec->vm().apiWrapperStructure.get())
  66         {
  67         }
  68
  69         WriteBarrier<Unknown> m_value;
  70     };
  71
  72     inline JSValue jsAPIValueWrapper(ExecState* exec, JSValue value)
  73     {
  74         return JSAPIValueWrapper::create(exec, value);
  75     }
  76
  77 } // namespace JSC
  78
  79 #endif // JSAPIValueWrapper_h