238 lines
8.6 KiB
C++
238 lines
8.6 KiB
C++
/*
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* Copyright (C) 2006-2019 Apple Inc. All rights reserved.
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* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef JSCallbackObject_h
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#define JSCallbackObject_h
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#include "JSObjectRef.h"
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#include "JSValueRef.h"
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#include "JSObject.h"
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namespace JSC {
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struct JSCallbackObjectData {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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JSCallbackObjectData(void* privateData, JSClassRef jsClass)
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: privateData(privateData)
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, jsClass(jsClass)
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{
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JSClassRetain(jsClass);
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}
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~JSCallbackObjectData()
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{
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JSClassRelease(jsClass);
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}
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JSValue getPrivateProperty(const Identifier& propertyName) const
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{
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if (!m_privateProperties)
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return JSValue();
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return m_privateProperties->getPrivateProperty(propertyName);
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}
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void setPrivateProperty(VM& vm, JSCell* owner, const Identifier& propertyName, JSValue value)
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{
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if (!m_privateProperties)
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m_privateProperties = makeUnique<JSPrivatePropertyMap>();
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m_privateProperties->setPrivateProperty(vm, owner, propertyName, value);
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}
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void deletePrivateProperty(const Identifier& propertyName)
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{
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if (!m_privateProperties)
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return;
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m_privateProperties->deletePrivateProperty(propertyName);
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}
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void visitChildren(SlotVisitor& visitor)
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{
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JSPrivatePropertyMap* properties = m_privateProperties.get();
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if (!properties)
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return;
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properties->visitChildren(visitor);
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}
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void* privateData;
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JSClassRef jsClass;
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struct JSPrivatePropertyMap {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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JSValue getPrivateProperty(const Identifier& propertyName) const
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{
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PrivatePropertyMap::const_iterator location = m_propertyMap.find(propertyName.impl());
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if (location == m_propertyMap.end())
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return JSValue();
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return location->value.get();
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}
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void setPrivateProperty(VM& vm, JSCell* owner, const Identifier& propertyName, JSValue value)
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{
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LockHolder locker(m_lock);
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WriteBarrier<Unknown> empty;
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m_propertyMap.add(propertyName.impl(), empty).iterator->value.set(vm, owner, value);
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}
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void deletePrivateProperty(const Identifier& propertyName)
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{
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LockHolder locker(m_lock);
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m_propertyMap.remove(propertyName.impl());
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}
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void visitChildren(SlotVisitor& visitor)
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{
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LockHolder locker(m_lock);
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for (auto& pair : m_propertyMap) {
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if (pair.value)
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visitor.append(pair.value);
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}
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}
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private:
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typedef HashMap<RefPtr<UniquedStringImpl>, WriteBarrier<Unknown>, IdentifierRepHash> PrivatePropertyMap;
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PrivatePropertyMap m_propertyMap;
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Lock m_lock;
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};
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std::unique_ptr<JSPrivatePropertyMap> m_privateProperties;
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};
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template <class Parent>
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class JSCallbackObject final : public Parent {
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protected:
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JSCallbackObject(ExecState*, Structure*, JSClassRef, void* data);
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JSCallbackObject(VM&, JSClassRef, Structure*);
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void finishCreation(ExecState*);
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void finishCreation(VM&);
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public:
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typedef Parent Base;
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static const unsigned StructureFlags = Base::StructureFlags | ProhibitsPropertyCaching | OverridesGetOwnPropertySlot | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero | ImplementsHasInstance | OverridesGetPropertyNames | OverridesGetCallData;
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static_assert(!(StructureFlags & ImplementsDefaultHasInstance), "using customHasInstance");
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~JSCallbackObject();
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static JSCallbackObject* create(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, JSClassRef classRef, void* data)
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{
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VM& vm = exec->vm();
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ASSERT_UNUSED(globalObject, !structure->globalObject() || structure->globalObject() == globalObject);
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JSCallbackObject* callbackObject = new (NotNull, allocateCell<JSCallbackObject>(vm.heap)) JSCallbackObject(exec, structure, classRef, data);
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callbackObject->finishCreation(exec);
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return callbackObject;
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}
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static JSCallbackObject<Parent>* create(VM&, JSClassRef, Structure*);
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static const bool needsDestruction;
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static void destroy(JSCell* cell)
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{
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static_cast<JSCallbackObject*>(cell)->JSCallbackObject::~JSCallbackObject();
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}
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void setPrivate(void* data);
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void* getPrivate();
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// FIXME: We should fix the warnings for extern-template in JSObject template classes: https://bugs.webkit.org/show_bug.cgi?id=161979
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IGNORE_CLANG_WARNINGS_BEGIN("undefined-var-template")
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DECLARE_INFO;
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IGNORE_CLANG_WARNINGS_END
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JSClassRef classRef() const { return m_callbackObjectData->jsClass; }
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bool inherits(JSClassRef) const;
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static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
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JSValue getPrivateProperty(const Identifier& propertyName) const
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{
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return m_callbackObjectData->getPrivateProperty(propertyName);
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}
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void setPrivateProperty(VM& vm, const Identifier& propertyName, JSValue value)
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{
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m_callbackObjectData->setPrivateProperty(vm, this, propertyName, value);
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}
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void deletePrivateProperty(const Identifier& propertyName)
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{
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m_callbackObjectData->deletePrivateProperty(propertyName);
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}
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using Parent::methodTable;
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private:
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static String className(const JSObject*, VM&);
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static String toStringName(const JSObject*, ExecState*);
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static JSValue defaultValue(const JSObject*, ExecState*, PreferredPrimitiveType);
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static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
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static bool getOwnPropertySlotByIndex(JSObject*, ExecState*, unsigned propertyName, PropertySlot&);
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static bool put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
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static bool putByIndex(JSCell*, ExecState*, unsigned, JSValue, bool shouldThrow);
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static bool deleteProperty(JSCell*, ExecState*, PropertyName);
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static bool deletePropertyByIndex(JSCell*, ExecState*, unsigned);
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static bool customHasInstance(JSObject*, ExecState*, JSValue);
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static void getOwnNonIndexPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
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static ConstructType getConstructData(JSCell*, ConstructData&);
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static CallType getCallData(JSCell*, CallData&);
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static void visitChildren(JSCell* cell, SlotVisitor& visitor)
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{
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JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell);
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ASSERT_GC_OBJECT_INHERITS((static_cast<Parent*>(thisObject)), JSCallbackObject<Parent>::info());
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Parent::visitChildren(thisObject, visitor);
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thisObject->m_callbackObjectData->visitChildren(visitor);
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}
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void init(ExecState*);
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static JSCallbackObject* asCallbackObject(JSValue);
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static JSCallbackObject* asCallbackObject(EncodedJSValue);
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static EncodedJSValue JSC_HOST_CALL call(ExecState*);
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static EncodedJSValue JSC_HOST_CALL construct(ExecState*);
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JSValue getStaticValue(ExecState*, PropertyName);
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static EncodedJSValue staticFunctionGetter(ExecState*, EncodedJSValue, PropertyName);
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static EncodedJSValue callbackGetter(ExecState*, EncodedJSValue, PropertyName);
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std::unique_ptr<JSCallbackObjectData> m_callbackObjectData;
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const ClassInfo* m_classInfo { nullptr };
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};
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} // namespace JSC
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// include the actual template class implementation
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#include "JSCallbackObjectFunctions.h"
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#endif // JSCallbackObject_h
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