Crazy Eddies GUI System: CEGUISingleton.h Source File

Crazy Eddies GUI System 0.7.6

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CEGUISingleton.h

    00001 /***********************************************************************
    00002         filename:       CEGUISingleton.h
    00003         created:        22/2/2004
    00004         author:         Paul D Turner
    00005
    00006         purpose:        Singleton Base Class
    00007 *************************************************************************/
    00008 /***************************************************************************
    00009  *   Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team
    00010  *
    00011  *   Permission is hereby granted, free of charge, to any person obtaining
    00012  *   a copy of this software and associated documentation files (the
    00013  *   "Software"), to deal in the Software without restriction, including
    00014  *   without limitation the rights to use, copy, modify, merge, publish,
    00015  *   distribute, sublicense, and/or sell copies of the Software, and to
    00016  *   permit persons to whom the Software is furnished to do so, subject to
    00017  *   the following conditions:
    00018  *
    00019  *   The above copyright notice and this permission notice shall be
    00020  *   included in all copies or substantial portions of the Software.
    00021  *
    00022  *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    00023  *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    00024  *   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
    00025  *   IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
    00026  *   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
    00027  *   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
    00028  *   OTHER DEALINGS IN THE SOFTWARE.
    00029  ***************************************************************************/
    00030 /*************************************************************************
    00031
    00032         The code in this file is taken from article 1.3 in the the book:
    00033         Game Programming Gems from Charles River Media
    00034
    00035 *************************************************************************/
    00036 #ifndef _CEGUISingleton_h_
    00037 #define _CEGUISingleton_h_
    00038
    00039 #include "CEGUIBase.h"
    00040 #include <cassert>
    00041
    00042 // Start of CEGUI namespace section
    00043 namespace CEGUI
    00044 {
    00045 /* Copyright (C) Scott Bilas, 2000.
    00046  * All rights reserved worldwide.
    00047  *
    00048  * This software is provided "as is" without express or implied
    00049  * warranties. You may freely copy and compile this source into
    00050  * applications you distribute provided that the copyright text
    00051  * below is included in the resulting source code, for example:
    00052  * "Portions Copyright (C) Scott Bilas, 2000"
    00053  */
    00054
    00055
    00056 template <typename T> class CEGUIEXPORT Singleton
    00057 {
    00058 protected:
    00059 // TODO: Come up with something better than this!
    00060 // TODO:
    00061 // TODO: This super-nasty piece of nastiness was put in for continued
    00062 // TODO: compatability with MSVC++ and MinGW - the latter apparently
    00063 // TODO: needs this.
    00064     static
    00065 #ifdef __MINGW32__
    00066     CEGUIEXPORT
    00067 #endif
    00068     T* ms_Singleton;
    00069
    00070 public:
    00071     Singleton( void )
    00072     {
    00073         assert( !ms_Singleton );
    00074         ms_Singleton = static_cast<T*>(this);
    00075     }
    00076    ~Singleton( void )
    00077         {  assert( ms_Singleton );  ms_Singleton = 0;  }
    00078     static T& getSingleton( void )
    00079         {  assert( ms_Singleton );  return ( *ms_Singleton );  }
    00080     static T* getSingletonPtr( void )
    00081         {  return ( ms_Singleton );  }
    00082
    00083 private:
    00084     Singleton& operator=(const Singleton&) { return this; }
    00085     Singleton(const Singleton&) {}
    00086 };
    00087
    00088 } // End of  CEGUI namespace section
    00089
    00090
    00091
    00092 #endif  // end of guard _CEGUISingleton_h_