/* * 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. */ #include "config.h" #include "JSDOMGuardedObject.h" namespace WebCore { using namespace JSC; DOMGuardedObject::DOMGuardedObject(JSDOMGlobalObject& globalObject, JSCell& guarded) : ActiveDOMCallback(globalObject.scriptExecutionContext()) , m_guarded(&guarded) , m_globalObject(&globalObject) { auto locker = lockDuringMarking(globalObject.vm().heap, globalObject.gcLock()); globalObject.vm().heap.writeBarrier(&globalObject, &guarded); globalObject.guardedObjects(locker).add(this); } DOMGuardedObject::~DOMGuardedObject() { clear(); } void DOMGuardedObject::clear() { ASSERT(!m_guarded || m_globalObject); if (m_guarded && m_globalObject) { auto locker = lockDuringMarking(m_globalObject->vm().heap, m_globalObject->gcLock()); m_globalObject->guardedObjects(locker).remove(this); } m_guarded.clear(); m_globalObject.clear(); } void DOMGuardedObject::contextDestroyed() { ActiveDOMCallback::contextDestroyed(); clear(); } }