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31 #ifndef ResourceOwner_h
32 #define ResourceOwner_h
34 #include "core/fetch/ResourcePtr.h"
39 template<class R, class C = typename R::ClientType>
40 class ResourceOwner : public C {
42 typedef R ResourceType;
44 virtual ~ResourceOwner();
45 ResourceType* resource() const { return m_resource.get(); }
49 ResourceOwner(const ResourceOwner& other) { setResource(other.resource()); }
50 explicit ResourceOwner(const ResourcePtr<ResourceType>&);
52 void setResource(const ResourcePtr<ResourceType>&);
55 ResourceOwner& operator=(const ResourceOwner& other);
58 ResourcePtr<ResourceType> m_resource;
61 template<class R, class C>
62 inline ResourceOwner<R, C>::ResourceOwner()
66 template<class R, class C>
67 inline ResourceOwner<R, C>::~ResourceOwner()
72 template<class R, class C>
73 inline ResourceOwner<R, C>::ResourceOwner(const ResourcePtr<R>& resource)
74 : m_resource(resource)
77 m_resource->addClient(this);
80 template<class R, class C>
81 inline void ResourceOwner<R, C>::setResource(const ResourcePtr<R>& newResource)
83 if (newResource == m_resource)
86 // Some ResourceClient implementations reenter this so
87 // we need to prevent double removal.
88 if (ResourcePtr<ResourceType> oldResource = m_resource) {
90 oldResource->removeClient(this);
94 m_resource = newResource;
95 m_resource->addClient(this);
99 template<class R, class C>
100 inline void ResourceOwner<R, C>::clearResource()
105 template<class R, class C>
106 inline ResourceOwner<R, C>& ResourceOwner<R, C>::operator=(const ResourceOwner<R, C>& other)
110 setResource(other.resource());