/* * Copyright (C) 2017 Apple 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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. */ #pragma once #include "ActiveDOMCallback.h" #include "JSDOMGlobalObject.h" #include <JavaScriptCore/HeapInlines.h> #include <JavaScriptCore/JSCell.h> #include <JavaScriptCore/SlotVisitorInlines.h> #include <JavaScriptCore/StrongInlines.h> namespace WebCore { class WEBCORE_EXPORT DOMGuardedObject : public RefCounted<DOMGuardedObject>, public ActiveDOMCallback { public: ~DOMGuardedObject(); bool isSuspended() const { return !m_guarded || !canInvokeCallback(); } // The wrapper world has gone away or active DOM objects have been suspended. void visitAggregate(JSC::SlotVisitor& visitor) { visitor.append(m_guarded); } JSC::JSValue guardedObject() const { return m_guarded.get(); } JSDOMGlobalObject* globalObject() const { return m_globalObject.get(); } void clear(); protected: DOMGuardedObject(JSDOMGlobalObject&, JSC::JSCell&); void contextDestroyed() override; bool isEmpty() { return !m_guarded; } JSC::Weak<JSC::JSCell> m_guarded; JSC::Weak<JSDOMGlobalObject> m_globalObject; }; template <typename T> class DOMGuarded : public DOMGuardedObject { protected: DOMGuarded(JSDOMGlobalObject& globalObject, T& guarded) : DOMGuardedObject(globalObject, guarded) { } T* guarded() const { return JSC::jsDynamicCast<T*>(globalObject()->vm(), guardedObject()); } }; } // namespace WebCore