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 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 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#include "config.h" 27#include "CachedResourceHandle.h" 28 29#include "CachedResource.h" 30 31namespace WebCore { 32 33CachedResourceHandleBase::CachedResourceHandleBase() 34 : m_resource(0) 35{ 36} 37 38CachedResourceHandleBase::CachedResourceHandleBase(CachedResource* resource) 39 : m_resource(resource) 40{ 41 if (m_resource) 42 m_resource->registerHandle(this); 43} 44 45CachedResourceHandleBase::CachedResourceHandleBase(const CachedResourceHandleBase& other) 46 : m_resource(other.m_resource) 47{ 48 if (m_resource) 49 m_resource->registerHandle(this); 50} 51 52CachedResourceHandleBase::~CachedResourceHandleBase() 53{ 54 if (m_resource) 55 m_resource->unregisterHandle(this); 56} 57 58void CachedResourceHandleBase::setResource(CachedResource* resource) 59{ 60 if (resource == m_resource) 61 return; 62 if (m_resource) 63 m_resource->unregisterHandle(this); 64 m_resource = resource; 65 if (m_resource) 66 m_resource->registerHandle(this); 67} 68 69} 70