runtime/GetterSetter.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, 2006, 2007, 2008, 2009 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 GetterSetter_h
  24 #define GetterSetter_h
  25
  26 #include "JSCell.h"
  27
  28 #include "CallFrame.h"
  29 #include "Structure.h"
  30
  31 namespace JSC {
  32
  33     class JSObject;
  34
  35     // This is an internal value object which stores getter and setter functions
  36     // for a property.
  37     class GetterSetter : public JSCell {
  38         friend class JIT;
  39     public:
  40         GetterSetter(ExecState* exec)
  41             : JSCell(exec->globalData(), exec->globalData().getterSetterStructure.get())
  42         {
  43         }
  44
  45         virtual void visitChildren(SlotVisitor&);
  46
  47         JSObject* getter() const { return m_getter.get(); }
  48         void setGetter(JSGlobalData& globalData, JSObject* getter) { m_getter.set(globalData, this, getter); }
  49         JSObject* setter() const { return m_setter.get(); }
  50         void setSetter(JSGlobalData& globalData, JSObject* setter) { m_setter.set(globalData, this, setter); }
  51         static Structure* createStructure(JSGlobalData& globalData, JSValue prototype)
  52         {
  53             return Structure::create(globalData, prototype, TypeInfo(GetterSetterType, OverridesVisitChildren), AnonymousSlotCount, &s_info);
  54         }
  55
  56         static const ClassInfo s_info;
  57
  58     private:
  59         virtual bool isGetterSetter() const;
  60
  61         WriteBarrier<JSObject> m_getter;
  62         WriteBarrier<JSObject> m_setter;
  63     };
  64
  65     GetterSetter* asGetterSetter(JSValue);
  66
  67     inline GetterSetter* asGetterSetter(JSValue value)
  68     {
  69         ASSERT(value.asCell()->isGetterSetter());
  70         return static_cast<GetterSetter*>(value.asCell());
  71     }
  72
  73
  74 } // namespace JSC
  75
  76 #endif // GetterSetter_h