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All rights reserved. 309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * 409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * Redistribution and use in source and binary forms, with or without 509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * modification, are permitted provided that the following conditions are 609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * met: 709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * 809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * * Redistributions of source code must retain the above copyright 909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * notice, this list of conditions and the following disclaimer. 1009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * * Redistributions in binary form must reproduce the above 1109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * copyright notice, this list of conditions and the following disclaimer 1209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * in the documentation and/or other materials provided with the 1309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * distribution. 1409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * * Neither the name of Google Inc. nor the names of its 1509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * contributors may be used to endorse or promote products derived from 1609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * this software without specific prior written permission. 1709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * 1809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) */ 3009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 3109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#ifndef ResourceOwner_h 3209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#define ResourceOwner_h 3309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 3409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#include "core/fetch/ResourcePtr.h" 3509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 36c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)namespace blink { 3709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 3809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 3909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)template<class R, class C = typename R::ClientType> 4009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)class ResourceOwner : public C { 4109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)public: 4209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) typedef R ResourceType; 4309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 4409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) virtual ~ResourceOwner(); 4509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) ResourceType* resource() const { return m_resource.get(); } 4609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 4709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)protected: 4809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) ResourceOwner(); 49d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) ResourceOwner(const ResourceOwner& other) { setResource(other.resource()); } 5009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) explicit ResourceOwner(const ResourcePtr<ResourceType>&); 5109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 52d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) void setResource(const ResourcePtr<ResourceType>&); 5309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) void clearResource(); 5409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 5509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) ResourceOwner& operator=(const ResourceOwner& other); 5609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 5709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)private: 5809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) ResourcePtr<ResourceType> m_resource; 5909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)}; 6009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 6109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)template<class R, class C> 6209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)inline ResourceOwner<R, C>::ResourceOwner() 6309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 6409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 6509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 6609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)template<class R, class C> 6709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)inline ResourceOwner<R, C>::~ResourceOwner() 6809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 6909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) clearResource(); 7009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 7109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 7209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)template<class R, class C> 7309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)inline ResourceOwner<R, C>::ResourceOwner(const ResourcePtr<R>& resource) 7409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) : m_resource(resource) 7509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 7609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (m_resource) 7709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) m_resource->addClient(this); 7809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 7909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 8009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)template<class R, class C> 81d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles)inline void ResourceOwner<R, C>::setResource(const ResourcePtr<R>& newResource) 8209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 8309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (newResource == m_resource) 8409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return; 8509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 8609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // Some ResourceClient implementations reenter this so 8709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) // we need to prevent double removal. 8809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (ResourcePtr<ResourceType> oldResource = m_resource) { 8909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) m_resource.clear(); 90d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) oldResource->removeClient(this); 9109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 9209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 9309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (newResource) { 9409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) m_resource = newResource; 95d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) m_resource->addClient(this); 9609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) } 9709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 9809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 9909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)template<class R, class C> 10009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)inline void ResourceOwner<R, C>::clearResource() 10109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 10209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) setResource(0); 10309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 10409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 10509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)template<class R, class C> 10609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)inline ResourceOwner<R, C>& ResourceOwner<R, C>::operator=(const ResourceOwner<R, C>& other) 10709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles){ 10809380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) if (this == &other) 10909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return *this; 11009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) setResource(other.resource()); 11109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) return *this; 11209380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)} 11309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 114c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)} // namespace blink 11509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) 11609380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#endif 117