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libsfml  1.6+dfsg2
Resource.hpp
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00001 
00002 //
00003 // SFML - Simple and Fast Multimedia Library
00004 // Copyright (C) 2007 Laurent Gomila (laurent.gom@gmail.com)
00005 //
00006 // This software is provided 'as-is', without any express or implied warranty.
00007 // In no event will the authors be held liable for any damages arising from the use of this software.
00008 //
00009 // Permission is granted to anyone to use this software for any purpose,
00010 // including commercial applications, and to alter it and redistribute it freely,
00011 // subject to the following restrictions:
00012 //
00013 // 1. The origin of this software must not be misrepresented;
00014 //    you must not claim that you wrote the original software.
00015 //    If you use this software in a product, an acknowledgment
00016 //    in the product documentation would be appreciated but is not required.
00017 //
00018 // 2. Altered source versions must be plainly marked as such,
00019 //    and must not be misrepresented as being the original software.
00020 //
00021 // 3. This notice may not be removed or altered from any source distribution.
00022 //
00024 
00025 #ifndef SFML_RESOURCE_HPP
00026 #define SFML_RESOURCE_HPP
00027 
00029 // Headers
00031 #include <set>
00032 
00033 
00034 namespace sf
00035 {
00037 // These two classes are defined in the same header because
00038 // they depend on each other. And as they're template classes,
00039 // they must be entirely defined in header files, which
00040 // prevents from proper separate compiling
00042 
00043 template <typename> class ResourcePtr;
00044 
00049 template <typename T>
00050 class Resource
00051 {
00052 protected :
00053 
00058     Resource();
00059 
00066     Resource(const Resource<T>& Copy);
00067 
00072     ~Resource();
00073 
00082     Resource<T>& operator =(const Resource<T>& Other);
00083 
00084 private :
00085 
00086     friend class ResourcePtr<T>;
00087 
00094     void Connect(ResourcePtr<T>& Observer) const;
00095 
00102     void Disconnect(ResourcePtr<T>& Observer) const;
00103 
00105     // Member data
00107     mutable std::set<ResourcePtr<T>*> myObservers;
00108 };
00109 
00110 
00115 template <typename T>
00116 class ResourcePtr
00117 {
00118 public :
00119 
00124     ResourcePtr();
00125 
00132     ResourcePtr(const T* Resource);
00133 
00140     ResourcePtr(const ResourcePtr<T>& Copy);
00141 
00146     ~ResourcePtr();
00147 
00156     ResourcePtr<T>& operator =(const ResourcePtr<T>& Other);
00157 
00166     ResourcePtr<T>& operator =(const T* Resource);
00167 
00177     operator const T*() const;
00178 
00185     const T& operator *() const;
00186 
00193     const T* operator ->() const;
00194 
00200     void OnResourceDestroyed();
00201 
00202 private :
00203 
00205     // Member data
00207     const T* myResource; 
00208 };
00209 
00210 #include <SFML/System/Resource.inl>
00211 #include <SFML/System/ResourcePtr.inl>
00212 
00213 } // namespace sf
00214 
00215 
00216 #endif // SFML_RESOURCE_HPP