/* | |
* 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> | |
#include <wtf/RefCounted.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<JSC::UString::Rep>, StaticValueEntry*> OpaqueJSClassStaticValuesTable; | |
typedef HashMap<RefPtr<JSC::UString::Rep>, 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 |