MyGUI
3.2.0
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00001 00006 /* 00007 This file is part of MyGUI. 00008 00009 MyGUI is free software: you can redistribute it and/or modify 00010 it under the terms of the GNU Lesser General Public License as published by 00011 the Free Software Foundation, either version 3 of the License, or 00012 (at your option) any later version. 00013 00014 MyGUI is distributed in the hope that it will be useful, 00015 but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00017 GNU Lesser General Public License for more details. 00018 00019 You should have received a copy of the GNU Lesser General Public License 00020 along with MyGUI. If not, see <http://www.gnu.org/licenses/>. 00021 */ 00022 #ifndef __MYGUI_SINGLETON_H__ 00023 #define __MYGUI_SINGLETON_H__ 00024 00025 #include "MyGUI_Diagnostic.h" 00026 00027 namespace MyGUI 00028 { 00029 00030 #if MYGUI_COMPILER == MYGUI_COMPILER_MSVC || MYGUI_PLATFORM == MYGUI_PLATFORM_APPLE 00031 template <class T> 00032 class Singleton 00033 #else 00034 template <class T> 00035 class MYGUI_EXPORT Singleton 00036 #endif 00037 { 00038 public: 00039 typedef Singleton<T> Base; 00040 00041 Singleton() 00042 { 00043 MYGUI_ASSERT(nullptr == msInstance, "Singleton instance " << getClassTypeName() << " already exsist"); 00044 msInstance = static_cast<T*>(this); 00045 } 00046 00047 virtual ~Singleton() 00048 { 00049 MYGUI_ASSERT(nullptr != msInstance, "Destroying Singleton instance " << getClassTypeName() << " before constructing it."); 00050 msInstance = nullptr; 00051 } 00052 00053 static T& getInstance() 00054 { 00055 MYGUI_ASSERT(nullptr != getInstancePtr(), "Singleton instance " << getClassTypeName() << " was not created"); 00056 return (*getInstancePtr()); 00057 } 00058 00059 static T* getInstancePtr() 00060 { 00061 return msInstance; 00062 } 00063 00064 static const char* getClassTypeName() 00065 { 00066 return mClassTypeName; 00067 } 00068 00069 private: 00070 static T* msInstance; 00071 00072 protected: 00073 static const char* mClassTypeName; 00074 }; 00075 00076 } // namespace MyGUI 00077 00078 #endif // __MYGUI_SINGLETON_H__