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# OgreSingleton.h

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    00001 /*
    00002 -----------------------------------------------------------------------------
    00003 This source file is part of OGRE
    00004     (Object-oriented Graphics Rendering Engine)
    00005 For the latest info, see http://www.ogre3d.org/
    00006
    00007 Copyright (c) 2000-2006 Torus Knot Software Ltd
    00008 Also see acknowledgements in Readme.html
    00009
    00010 This program is free software; you can redistribute it and/or modify it under
    00011 the terms of the GNU Lesser General Public License as published by the Free Software
    00012 Foundation; either version 2 of the License, or (at your option) any later
    00013 version.
    00014
    00015 This program is distributed in the hope that it will be useful, but WITHOUT
    00016 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    00017 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
    00018
    00019 You should have received a copy of the GNU Lesser General Public License along with
    00020 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
    00021 Place - Suite 330, Boston, MA 02111-1307, USA, or go to
    00022 http://www.gnu.org/copyleft/lesser.txt.
    00023
    00024 You may alternatively use this source under the terms of a specific version of
    00025 the OGRE Unrestricted License provided you have obtained such a license from
    00026 Torus Knot Software Ltd.
    00027 -----------------------------------------------------------------------------
    00028 */
    00029 /* Original version Copyright (C) Scott Bilas, 2000.
    00030  * All rights reserved worldwide.
    00031  *
    00032  * This software is provided "as is" without express or implied
    00033  * warranties. You may freely copy and compile this source into
    00034  * applications you distribute provided that the copyright text
    00035  * below is included in the resulting source code, for example:
    00036  * "Portions Copyright (C) Scott Bilas, 2000"
    00037  */
    00038 #ifndef _SINGLETON_H__
    00039 #define _SINGLETON_H__
    00040
    00041 // Added by Steve Streeting for Ogre
    00042 #include "OgrePrerequisites.h"
    00043
    00044 #if OGRE_COMPILER == OGRE_COMPILER_MSVC
    00045 // Turn off warnings generated by this singleton implementation
    00046 #   pragma warning (disable : 4311)
    00047 #   pragma warning (disable : 4312)
    00048 #endif
    00049
    00050 #if defined ( OGRE_GCC_VISIBILITY )
    00051 #   pragma GCC visibility push(default)
    00052 #endif
    00053 namespace Ogre {
    00054 // End SJS additions
    00057     template <typename T> class Singleton
    00058     {
    00059     protected:
    00060
    00061         static T* ms_Singleton;
    00062
    00063     public:
    00064         Singleton( void )
    00065         {
    00066             assert( !ms_Singleton );
    00067 #if defined( _MSC_VER ) && _MSC_VER < 1200
    00068             int offset = (int)(T*)1 - (int)(Singleton <T>*)(T*)1;
    00069             ms_Singleton = (T*)((int)this + offset);
    00070 #else
    00071         ms_Singleton = static_cast< T* >( this );
    00072 #endif
    00073         }
    00074         ~Singleton( void )
    00075             {  assert( ms_Singleton );  ms_Singleton = 0;  }
    00076         static T& getSingleton( void )
    00077         {   assert( ms_Singleton );  return ( *ms_Singleton ); }
    00078         static T* getSingletonPtr( void )
    00079         { return ms_Singleton; }
    00080     };
    00081 }
    00082 #if defined ( OGRE_GCC_VISIBILITY )
    00083 #   pragma GCC visibility pop
    00084 #endif
    00085 #endif

Copyright © 2000-2005 by The OGRE Team
This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Thu Mar 6 09:46:26 2008