1 /* 2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 */ 26 27 #include "config.h" 28 #include "core/platform/LifecycleObserver.h" 29 30 #include "core/platform/LifecycleContext.h" 31 32 namespace WebCore { 33 34 LifecycleObserver::LifecycleObserver(LifecycleContext* lifecycleContext, Type type) 35 : m_lifecycleContext(0) 36 , m_observerType(type) 37 { 38 observeContext(lifecycleContext); 39 } 40 41 LifecycleObserver::~LifecycleObserver() 42 { 43 observeContext(0); 44 } 45 46 void LifecycleObserver::observeContext(LifecycleContext* context) 47 { 48 if (m_lifecycleContext) { 49 ASSERT(m_lifecycleContext->isContextThread()); 50 m_lifecycleContext->wasUnobservedBy(this); 51 } 52 53 m_lifecycleContext = context; 54 55 if (m_lifecycleContext) { 56 ASSERT(m_lifecycleContext->isContextThread()); 57 m_lifecycleContext->wasObservedBy(this); 58 } 59 } 60 61 void LifecycleObserver::contextDestroyed() 62 { 63 m_lifecycleContext = 0; 64 } 65 66 } // namespace WebCore 67
