Crazy Eddie's GUI System
0.8.4
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00001 /*********************************************************************** 00002 created: 22/2/2004 00003 author: Paul D Turner 00004 00005 purpose: Singleton Base Class 00006 *************************************************************************/ 00007 /*************************************************************************** 00008 * Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team 00009 * 00010 * Permission is hereby granted, free of charge, to any person obtaining 00011 * a copy of this software and associated documentation files (the 00012 * "Software"), to deal in the Software without restriction, including 00013 * without limitation the rights to use, copy, modify, merge, publish, 00014 * distribute, sublicense, and/or sell copies of the Software, and to 00015 * permit persons to whom the Software is furnished to do so, subject to 00016 * the following conditions: 00017 * 00018 * The above copyright notice and this permission notice shall be 00019 * included in all copies or substantial portions of the Software. 00020 * 00021 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00022 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00023 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 00024 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR 00025 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 00026 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 00027 * OTHER DEALINGS IN THE SOFTWARE. 00028 ***************************************************************************/ 00029 /************************************************************************* 00030 00031 The code in this file is taken from article 1.3 in the the book: 00032 Game Programming Gems from Charles River Media 00033 00034 *************************************************************************/ 00035 #ifndef _CEGUISingleton_h_ 00036 #define _CEGUISingleton_h_ 00037 00038 #include "CEGUI/Base.h" 00039 #include <cassert> 00040 00041 // Start of CEGUI namespace section 00042 namespace CEGUI 00043 { 00044 /* Copyright (C) Scott Bilas, 2000. 00045 * All rights reserved worldwide. 00046 * 00047 * This software is provided "as is" without express or implied 00048 * warranties. You may freely copy and compile this source into 00049 * applications you distribute provided that the copyright text 00050 * below is included in the resulting source code, for example: 00051 * "Portions Copyright (C) Scott Bilas, 2000" 00052 */ 00053 00054 00055 template <typename T> class CEGUIEXPORT Singleton 00056 { 00057 protected: 00058 // TODO: Come up with something better than this! 00059 // TODO: 00060 // TODO: This super-nasty piece of nastiness was put in for continued 00061 // TODO: compatability with MSVC++ and MinGW - the latter apparently 00062 // TODO: needs this. 00063 static 00064 #ifdef __MINGW32__ 00065 CEGUIEXPORT 00066 #endif 00067 T* ms_Singleton; 00068 00069 public: 00070 Singleton( void ) 00071 { 00072 assert( !ms_Singleton ); 00073 ms_Singleton = static_cast<T*>(this); 00074 } 00075 ~Singleton( void ) 00076 { assert( ms_Singleton ); ms_Singleton = 0; } 00077 static T& getSingleton( void ) 00078 { assert( ms_Singleton ); return ( *ms_Singleton ); } 00079 static T* getSingletonPtr( void ) 00080 { return ( ms_Singleton ); } 00081 00082 private: 00083 Singleton& operator=(const Singleton&) { return this; } 00084 Singleton(const Singleton&) {} 00085 }; 00086 00087 } // End of CEGUI namespace section 00088 00089 00090 00091 #endif // end of guard _CEGUISingleton_h_