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author | Steve Block <steveblock@google.com> | 2011-05-06 11:45:16 +0100 |
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committer | Steve Block <steveblock@google.com> | 2011-05-12 13:44:10 +0100 |
commit | cad810f21b803229eb11403f9209855525a25d57 (patch) | |
tree | 29a6fd0279be608e0fe9ffe9841f722f0f4e4269 /Source/JavaScriptCore/API/JSClassRef.h | |
parent | 121b0cf4517156d0ac5111caf9830c51b69bae8f (diff) | |
download | external_webkit-cad810f21b803229eb11403f9209855525a25d57.zip external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.gz external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.bz2 |
Merge WebKit at r75315: Initial merge by git.
Change-Id: I570314b346ce101c935ed22a626b48c2af266b84
Diffstat (limited to 'Source/JavaScriptCore/API/JSClassRef.h')
-rw-r--r-- | Source/JavaScriptCore/API/JSClassRef.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/API/JSClassRef.h b/Source/JavaScriptCore/API/JSClassRef.h new file mode 100644 index 0000000..5062093 --- /dev/null +++ b/Source/JavaScriptCore/API/JSClassRef.h @@ -0,0 +1,122 @@ +/* + * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef JSClassRef_h +#define JSClassRef_h + +#include "JSObjectRef.h" + +#include <runtime/JSObject.h> +#include <runtime/Protect.h> +#include <runtime/UString.h> +#include <runtime/WeakGCPtr.h> +#include <wtf/HashMap.h> + +struct StaticValueEntry : FastAllocBase { + StaticValueEntry(JSObjectGetPropertyCallback _getProperty, JSObjectSetPropertyCallback _setProperty, JSPropertyAttributes _attributes) + : getProperty(_getProperty), setProperty(_setProperty), attributes(_attributes) + { + } + + JSObjectGetPropertyCallback getProperty; + JSObjectSetPropertyCallback setProperty; + JSPropertyAttributes attributes; +}; + +struct StaticFunctionEntry : FastAllocBase { + StaticFunctionEntry(JSObjectCallAsFunctionCallback _callAsFunction, JSPropertyAttributes _attributes) + : callAsFunction(_callAsFunction), attributes(_attributes) + { + } + + JSObjectCallAsFunctionCallback callAsFunction; + JSPropertyAttributes attributes; +}; + +typedef HashMap<RefPtr<StringImpl>, StaticValueEntry*> OpaqueJSClassStaticValuesTable; +typedef HashMap<RefPtr<StringImpl>, StaticFunctionEntry*> OpaqueJSClassStaticFunctionsTable; + +struct OpaqueJSClass; + +// An OpaqueJSClass (JSClass) is created without a context, so it can be used with any context, even across context groups. +// This structure holds data members that vary across context groups. +struct OpaqueJSClassContextData : Noncopyable { + OpaqueJSClassContextData(OpaqueJSClass*); + ~OpaqueJSClassContextData(); + + // It is necessary to keep OpaqueJSClass alive because of the following rare scenario: + // 1. A class is created and used, so its context data is stored in JSGlobalData hash map. + // 2. The class is released, and when all JS objects that use it are collected, OpaqueJSClass + // is deleted (that's the part prevented by this RefPtr). + // 3. Another class is created at the same address. + // 4. When it is used, the old context data is found in JSGlobalData and used. + RefPtr<OpaqueJSClass> m_class; + + OpaqueJSClassStaticValuesTable* staticValues; + OpaqueJSClassStaticFunctionsTable* staticFunctions; + JSC::WeakGCPtr<JSC::JSObject> cachedPrototype; +}; + +struct OpaqueJSClass : public ThreadSafeShared<OpaqueJSClass> { + static PassRefPtr<OpaqueJSClass> create(const JSClassDefinition*); + static PassRefPtr<OpaqueJSClass> createNoAutomaticPrototype(const JSClassDefinition*); + ~OpaqueJSClass(); + + JSC::UString className(); + OpaqueJSClassStaticValuesTable* staticValues(JSC::ExecState*); + OpaqueJSClassStaticFunctionsTable* staticFunctions(JSC::ExecState*); + JSC::JSObject* prototype(JSC::ExecState*); + + OpaqueJSClass* parentClass; + OpaqueJSClass* prototypeClass; + + JSObjectInitializeCallback initialize; + JSObjectFinalizeCallback finalize; + JSObjectHasPropertyCallback hasProperty; + JSObjectGetPropertyCallback getProperty; + JSObjectSetPropertyCallback setProperty; + JSObjectDeletePropertyCallback deleteProperty; + JSObjectGetPropertyNamesCallback getPropertyNames; + JSObjectCallAsFunctionCallback callAsFunction; + JSObjectCallAsConstructorCallback callAsConstructor; + JSObjectHasInstanceCallback hasInstance; + JSObjectConvertToTypeCallback convertToType; + +private: + friend struct OpaqueJSClassContextData; + + OpaqueJSClass(); + OpaqueJSClass(const OpaqueJSClass&); + OpaqueJSClass(const JSClassDefinition*, OpaqueJSClass* protoClass); + + OpaqueJSClassContextData& contextData(JSC::ExecState*); + + // UStrings in these data members should not be put into any IdentifierTable. + JSC::UString m_className; + OpaqueJSClassStaticValuesTable* m_staticValues; + OpaqueJSClassStaticFunctionsTable* m_staticFunctions; +}; + +#endif // JSClassRef_h |