2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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29 #include "JSObjectRef.h"
35 #include <wtf/HashMap.h>
37 struct StaticValueEntry {
38 WTF_MAKE_FAST_ALLOCATED;
40 StaticValueEntry(JSObjectGetPropertyCallback _getProperty, JSObjectSetPropertyCallback _setProperty, JSPropertyAttributes _attributes)
41 : getProperty(_getProperty), setProperty(_setProperty), attributes(_attributes)
45 JSObjectGetPropertyCallback getProperty;
46 JSObjectSetPropertyCallback setProperty;
47 JSPropertyAttributes attributes;
50 struct StaticFunctionEntry {
51 WTF_MAKE_FAST_ALLOCATED;
53 StaticFunctionEntry(JSObjectCallAsFunctionCallback _callAsFunction, JSPropertyAttributes _attributes)
54 : callAsFunction(_callAsFunction), attributes(_attributes)
58 JSObjectCallAsFunctionCallback callAsFunction;
59 JSPropertyAttributes attributes;
62 typedef HashMap<RefPtr<StringImpl>, StaticValueEntry*> OpaqueJSClassStaticValuesTable;
63 typedef HashMap<RefPtr<StringImpl>, StaticFunctionEntry*> OpaqueJSClassStaticFunctionsTable;
67 // An OpaqueJSClass (JSClass) is created without a context, so it can be used with any context, even across context groups.
68 // This structure holds data members that vary across context groups.
69 struct OpaqueJSClassContextData {
70 WTF_MAKE_NONCOPYABLE(OpaqueJSClassContextData); WTF_MAKE_FAST_ALLOCATED;
72 OpaqueJSClassContextData(JSC::JSGlobalData&, OpaqueJSClass*);
73 ~OpaqueJSClassContextData();
75 // It is necessary to keep OpaqueJSClass alive because of the following rare scenario:
76 // 1. A class is created and used, so its context data is stored in JSGlobalData hash map.
77 // 2. The class is released, and when all JS objects that use it are collected, OpaqueJSClass
78 // is deleted (that's the part prevented by this RefPtr).
79 // 3. Another class is created at the same address.
80 // 4. When it is used, the old context data is found in JSGlobalData and used.
81 RefPtr<OpaqueJSClass> m_class;
83 OpaqueJSClassStaticValuesTable* staticValues;
84 OpaqueJSClassStaticFunctionsTable* staticFunctions;
85 JSC::Weak<JSC::JSObject> cachedPrototype;
88 struct OpaqueJSClass : public ThreadSafeRefCounted<OpaqueJSClass> {
89 static PassRefPtr<OpaqueJSClass> create(const JSClassDefinition*);
90 static PassRefPtr<OpaqueJSClass> createNoAutomaticPrototype(const JSClassDefinition*);
93 JSC::UString className();
94 OpaqueJSClassStaticValuesTable* staticValues(JSC::ExecState*);
95 OpaqueJSClassStaticFunctionsTable* staticFunctions(JSC::ExecState*);
96 JSC::JSObject* prototype(JSC::ExecState*);
98 OpaqueJSClass* parentClass;
99 OpaqueJSClass* prototypeClass;
101 JSObjectInitializeCallback initialize;
102 JSObjectFinalizeCallback finalize;
103 JSObjectHasPropertyCallback hasProperty;
104 JSObjectGetPropertyCallback getProperty;
105 JSObjectSetPropertyCallback setProperty;
106 JSObjectDeletePropertyCallback deleteProperty;
107 JSObjectGetPropertyNamesCallback getPropertyNames;
108 JSObjectCallAsFunctionCallback callAsFunction;
109 JSObjectCallAsConstructorCallback callAsConstructor;
110 JSObjectHasInstanceCallback hasInstance;
111 JSObjectConvertToTypeCallback convertToType;
114 friend struct OpaqueJSClassContextData;
117 OpaqueJSClass(const OpaqueJSClass&);
118 OpaqueJSClass(const JSClassDefinition*, OpaqueJSClass* protoClass);
120 OpaqueJSClassContextData& contextData(JSC::ExecState*);
122 // UStrings in these data members should not be put into any IdentifierTable.
123 JSC::UString m_className;
124 OpaqueJSClassStaticValuesTable* m_staticValues;
125 OpaqueJSClassStaticFunctionsTable* m_staticFunctions;
128 #endif // JSClassRef_h