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29 #include "core/fetch/Resource.h"
33 class ResourcePtrBase {
37 Resource* get() const { return m_resource; }
38 bool operator!() const { return !m_resource; }
39 void clear() { setResource(0); }
41 // This conversion operator allows implicit conversion to bool but not to other integer types.
42 typedef Resource* ResourcePtrBase::*UnspecifiedBoolType;
43 operator UnspecifiedBoolType() const { return m_resource ? &ResourcePtrBase::m_resource : 0; }
46 ResourcePtrBase() : m_resource(0) { }
47 ResourcePtrBase(Resource*);
48 ResourcePtrBase(const ResourcePtrBase&);
50 void setResource(Resource*);
53 ResourcePtrBase& operator=(const ResourcePtrBase&) { return *this; }
55 friend class Resource;
60 inline ResourcePtrBase::ResourcePtrBase(Resource* res)
64 m_resource->registerHandle(this);
67 inline ResourcePtrBase::~ResourcePtrBase()
70 m_resource->unregisterHandle(this);
73 inline ResourcePtrBase::ResourcePtrBase(const ResourcePtrBase& o)
74 : m_resource(o.m_resource)
77 m_resource->registerHandle(this);
80 template <class R> class ResourcePtr : public ResourcePtrBase {
83 ResourcePtr(R* res) : ResourcePtrBase(res) { }
84 ResourcePtr(const ResourcePtr<R>& o) : ResourcePtrBase(o) { }
85 template<typename U> ResourcePtr(const ResourcePtr<U>& o) : ResourcePtrBase(o.get()) { }
87 R* get() const { return reinterpret_cast<R*>(ResourcePtrBase::get()); }
88 R* operator->() const { return get(); }
90 ResourcePtr& operator=(R* res) { setResource(res); return *this; }
91 ResourcePtr& operator=(const ResourcePtr& o) { setResource(o.get()); return *this; }
92 template<typename U> ResourcePtr& operator=(const ResourcePtr<U>& o) { setResource(o.get()); return *this; }
94 bool operator==(const ResourcePtrBase& o) const { return get() == o.get(); }
95 bool operator!=(const ResourcePtrBase& o) const { return get() != o.get(); }
98 template <class R, class RR> bool operator==(const ResourcePtr<R>& h, const RR* res)
100 return h.get() == res;
102 template <class R, class RR> bool operator==(const RR* res, const ResourcePtr<R>& h)
104 return h.get() == res;
106 template <class R, class RR> bool operator!=(const ResourcePtr<R>& h, const RR* res)
108 return h.get() != res;
110 template <class R, class RR> bool operator!=(const RR* res, const ResourcePtr<R>& h)
112 return h.get() != res;