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 | |
38 | struct 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 | |
49 | struct StaticFunctionEntry : FastAllocBase { |
50 | StaticFunctionEntry(JSObjectCallAsFunctionCallback _callAsFunction, JSPropertyAttributes _attributes) |
51 | : callAsFunction(_callAsFunction), attributes(_attributes) |
52 | { |
53 | } |
54 | |
55 | JSObjectCallAsFunctionCallback callAsFunction; |
56 | JSPropertyAttributes attributes; |
57 | }; |
58 | |
59 | typedef HashMap<RefPtr<JSC::UString::Rep>, StaticValueEntry*> OpaqueJSClassStaticValuesTable; |
60 | typedef HashMap<RefPtr<JSC::UString::Rep>, StaticFunctionEntry*> OpaqueJSClassStaticFunctionsTable; |
61 | |
62 | struct 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. |
66 | struct 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 | |
83 | struct 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 | |
108 | private: |
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 | |