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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
40 private:
41 GetterSetter(ExecState* exec)
42 : JSCell(exec->vm(), exec->vm().getterSetterStructure.get())
43 {
44 }
45
46 public:
47 typedef JSCell Base;
48
49 static GetterSetter* create(ExecState* exec)
50 {
51 GetterSetter* getterSetter = new (NotNull, allocateCell<GetterSetter>(*exec->heap())) GetterSetter(exec);
52 getterSetter->finishCreation(exec->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), &s_info);
65 }
66
67 static const ClassInfo s_info;
68
69 private:
70 WriteBarrier<JSObject> m_getter;
71 WriteBarrier<JSObject> m_setter;
72 };
73
74 GetterSetter* asGetterSetter(JSValue);
75
76 inline GetterSetter* asGetterSetter(JSValue value)
77 {
78 ASSERT(value.asCell()->isGetterSetter());
79 return static_cast<GetterSetter*>(value.asCell());
80 }
81
82
83 } // namespace JSC
84
85 #endif // GetterSetter_h