/usr/include/cegui-0.8.4/CEGUI/Singleton.h is in libcegui-mk2-dev 0.8.4+dfsg-4ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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 "CEGUI/Base.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 ); }
private:
Singleton& operator=(const Singleton&) { return this; }
Singleton(const Singleton&) {}
};
} // End of CEGUI namespace section
#endif // end of guard _CEGUISingleton_h_
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