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 31namespace 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 40 private: 41 GetterSetter(VM& vm) 42 : JSCell(vm, vm.getterSetterStructure.get()) 43 { 44 } 45 46 public: 47 typedef JSCell Base; 48 49 static GetterSetter* create(VM& vm) 50 { 51 GetterSetter* getterSetter = new (NotNull, allocateCell<GetterSetter>(vm.heap)) GetterSetter(vm); 52 getterSetter->finishCreation(vm); 53 return getterSetter; 54 } 55 56 static void visitChildren(JSCell*, SlotVisitor&); 57 58 JSObject* getter() const { return m_getter.get(); } 59 void setGetter(VM& vm, JSObject* getter) { m_getter.setMayBeNull(vm, this, getter); } 60 JSObject* setter() const { return m_setter.get(); } 61 void setSetter(VM& vm, JSObject* setter) { m_setter.setMayBeNull(vm, this, setter); } 62 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype) 63 { 64 return Structure::create(vm, globalObject, prototype, TypeInfo(GetterSetterType, OverridesVisitChildren), info()); 65 } 66 67 static ptrdiff_t offsetOfGetter() 68 { 69 return OBJECT_OFFSETOF(GetterSetter, m_getter); 70 } 71 72 static ptrdiff_t offsetOfSetter() 73 { 74 return OBJECT_OFFSETOF(GetterSetter, m_setter); 75 } 76 77 DECLARE_INFO; 78 79 private: 80 WriteBarrier<JSObject> m_getter; 81 WriteBarrier<JSObject> m_setter; 82 }; 83 84 GetterSetter* asGetterSetter(JSValue); 85 86 inline GetterSetter* asGetterSetter(JSValue value) 87 { 88 ASSERT_WITH_SECURITY_IMPLICATION(value.asCell()->isGetterSetter()); 89 return static_cast<GetterSetter*>(value.asCell()); 90 } 91 92 JSValue callGetter(ExecState*, JSValue base, JSValue getterSetter); 93 void callSetter(ExecState*, JSValue base, JSValue getterSetter, JSValue value, ECMAMode); 94 95} // namespace JSC 96 97#endif // GetterSetter_h 98