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     static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
  38
  39     JSValue value() const { return m_value.get(); }
  40
  41     static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
  42     {
  43         return Structure::create(vm, globalObject, prototype, TypeInfo(APIValueWrapperType, OverridesGetPropertyNames), info());
  44     }
  45
  46     DECLARE_EXPORT_INFO;
  47
  48     static JSAPIValueWrapper* create(ExecState* exec, JSValue value)
  49     {
  50         VM& vm = exec->vm();
  51         JSAPIValueWrapper* wrapper = new (NotNull, allocateCell<JSAPIValueWrapper>(vm.heap)) JSAPIValueWrapper(exec);
  52         wrapper->finishCreation(vm, value);
  53         return wrapper;
  54     }
  55
  56 protected:
  57     void finishCreation(VM& vm, JSValue value)
  58     {
  59         Base::finishCreation(vm);
  60         m_value.set(vm, this, value);
  61         ASSERT(!value.isCell());
  62     }
  63
  64 private:
  65     JSAPIValueWrapper(ExecState* exec)
  66         : JSCell(exec->vm(), exec->vm().apiWrapperStructure.get())
  67     {
  68     }
  69
  70     WriteBarrier<Unknown> m_value;
  71 };
  72
  73 inline JSValue jsAPIValueWrapper(ExecState* exec, JSValue value)
  74 {
  75     return JSAPIValueWrapper::create(exec, value);
  76 }
  77
  78 } // namespace JSC
  79
  80 #endif // JSAPIValueWrapper_h