1/*
2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef JSClassRef_h
27#define JSClassRef_h
28
29#include "JSObjectRef.h"
30
31#include <runtime/JSObject.h>
32#include <runtime/Protect.h>
33#include <runtime/UString.h>
34#include <runtime/WeakGCPtr.h>
35#include <wtf/HashMap.h>
36#include <wtf/RefCounted.h>
37
38struct StaticValueEntry : FastAllocBase {
39 StaticValueEntry(JSObjectGetPropertyCallback _getProperty, JSObjectSetPropertyCallback _setProperty, JSPropertyAttributes _attributes)
40 : getProperty(_getProperty), setProperty(_setProperty), attributes(_attributes)
41 {
42 }
43
44 JSObjectGetPropertyCallback getProperty;
45 JSObjectSetPropertyCallback setProperty;
46 JSPropertyAttributes attributes;
47};
48
49struct StaticFunctionEntry : FastAllocBase {
50 StaticFunctionEntry(JSObjectCallAsFunctionCallback _callAsFunction, JSPropertyAttributes _attributes)
51 : callAsFunction(_callAsFunction), attributes(_attributes)
52 {
53 }
54
55 JSObjectCallAsFunctionCallback callAsFunction;
56 JSPropertyAttributes attributes;
57};
58
59typedef HashMap<RefPtr<JSC::UString::Rep>, StaticValueEntry*> OpaqueJSClassStaticValuesTable;
60typedef HashMap<RefPtr<JSC::UString::Rep>, StaticFunctionEntry*> OpaqueJSClassStaticFunctionsTable;
61
62struct OpaqueJSClass;
63
64// An OpaqueJSClass (JSClass) is created without a context, so it can be used with any context, even across context groups.
65// This structure holds data members that vary across context groups.
66struct OpaqueJSClassContextData : Noncopyable {
67 OpaqueJSClassContextData(OpaqueJSClass*);
68 ~OpaqueJSClassContextData();
69
70 // It is necessary to keep OpaqueJSClass alive because of the following rare scenario:
71 // 1. A class is created and used, so its context data is stored in JSGlobalData hash map.
72 // 2. The class is released, and when all JS objects that use it are collected, OpaqueJSClass
73 // is deleted (that's the part prevented by this RefPtr).
74 // 3. Another class is created at the same address.
75 // 4. When it is used, the old context data is found in JSGlobalData and used.
76 RefPtr<OpaqueJSClass> m_class;
77
78 OpaqueJSClassStaticValuesTable* staticValues;
79 OpaqueJSClassStaticFunctionsTable* staticFunctions;
80 JSC::WeakGCPtr<JSC::JSObject> cachedPrototype;
81};
82
83struct OpaqueJSClass : public ThreadSafeShared<OpaqueJSClass> {
84 static PassRefPtr<OpaqueJSClass> create(const JSClassDefinition*);
85 static PassRefPtr<OpaqueJSClass> createNoAutomaticPrototype(const JSClassDefinition*);
86 ~OpaqueJSClass();
87
88 JSC::UString className();
89 OpaqueJSClassStaticValuesTable* staticValues(JSC::ExecState*);
90 OpaqueJSClassStaticFunctionsTable* staticFunctions(JSC::ExecState*);
91 JSC::JSObject* prototype(JSC::ExecState*);
92
93 OpaqueJSClass* parentClass;
94 OpaqueJSClass* prototypeClass;
95
96 JSObjectInitializeCallback initialize;
97 JSObjectFinalizeCallback finalize;
98 JSObjectHasPropertyCallback hasProperty;
99 JSObjectGetPropertyCallback getProperty;
100 JSObjectSetPropertyCallback setProperty;
101 JSObjectDeletePropertyCallback deleteProperty;
102 JSObjectGetPropertyNamesCallback getPropertyNames;
103 JSObjectCallAsFunctionCallback callAsFunction;
104 JSObjectCallAsConstructorCallback callAsConstructor;
105 JSObjectHasInstanceCallback hasInstance;
106 JSObjectConvertToTypeCallback convertToType;
107
108private:
109 friend struct OpaqueJSClassContextData;
110
111 OpaqueJSClass();
112 OpaqueJSClass(const OpaqueJSClass&);
113 OpaqueJSClass(const JSClassDefinition*, OpaqueJSClass* protoClass);
114
115 OpaqueJSClassContextData& contextData(JSC::ExecState*);
116
117 // UStrings in these data members should not be put into any IdentifierTable.
118 JSC::UString m_className;
119 OpaqueJSClassStaticValuesTable* m_staticValues;
120 OpaqueJSClassStaticFunctionsTable* m_staticFunctions;
121};
122
123#endif // JSClassRef_h
124

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/API/JSClassRef.h