/*********************************************************************** filename: CEGUISingleton.h created: 22/2/2004 author: Paul D Turner purpose: Singleton Base Class *************************************************************************/ /*************************************************************************** * Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. ***************************************************************************/ /************************************************************************* The code in this file is taken from article 1.3 in the the book: Game Programming Gems from Charles River Media *************************************************************************/ #ifndef _CEGUISingleton_h_ #define _CEGUISingleton_h_ #include "CEGUIBase.h" #include <cassert> // Start of CEGUI namespace section namespace CEGUI { /* Copyright (C) Scott Bilas, 2000. * All rights reserved worldwide. * * This software is provided "as is" without express or implied * warranties. You may freely copy and compile this source into * applications you distribute provided that the copyright text * below is included in the resulting source code, for example: * "Portions Copyright (C) Scott Bilas, 2000" */ template <typename T> class CEGUIEXPORT Singleton { protected: // TODO: Come up with something better than this! // TODO: // TODO: This super-nasty piece of nastiness was put in for continued // TODO: compatability with MSVC++ and MinGW - the latter apparently // TODO: needs this. static #ifdef __MINGW32__ CEGUIEXPORT #endif T* ms_Singleton; public: Singleton( void ) { assert( !ms_Singleton ); ms_Singleton = static_cast<T*>(this); } ~Singleton( void ) { assert( ms_Singleton ); ms_Singleton = 0; } static T& getSingleton( void ) { assert( ms_Singleton ); return ( *ms_Singleton ); } static T* getSingletonPtr( void ) { return ( ms_Singleton ); } }; } // End of CEGUI namespace section #endif // end of guard _CEGUISingleton_h_