Crazy Eddie's GUI System 0.8.7
Singleton.h
1/***********************************************************************
2 created: 22/2/2004
3 author: Paul D Turner
4
5 purpose: Singleton Base Class
6*************************************************************************/
7/***************************************************************************
8 * Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining
11 * a copy of this software and associated documentation files (the
12 * "Software"), to deal in the Software without restriction, including
13 * without limitation the rights to use, copy, modify, merge, publish,
14 * distribute, sublicense, and/or sell copies of the Software, and to
15 * permit persons to whom the Software is furnished to do so, subject to
16 * the following conditions:
17 *
18 * The above copyright notice and this permission notice shall be
19 * included in all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
24 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
25 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
26 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
27 * OTHER DEALINGS IN THE SOFTWARE.
28 ***************************************************************************/
29/*************************************************************************
30
31 The code in this file is taken from article 1.3 in the the book:
32 Game Programming Gems from Charles River Media
33
34*************************************************************************/
35#ifndef _CEGUISingleton_h_
36#define _CEGUISingleton_h_
37
38#include "CEGUI/Base.h"
39#include <cassert>
40
41// Start of CEGUI namespace section
42namespace CEGUI
43{
44/* Copyright (C) Scott Bilas, 2000.
45 * All rights reserved worldwide.
46 *
47 * This software is provided "as is" without express or implied
48 * warranties. You may freely copy and compile this source into
49 * applications you distribute provided that the copyright text
50 * below is included in the resulting source code, for example:
51 * "Portions Copyright (C) Scott Bilas, 2000"
52 */
53
54
55template <typename T> class CEGUIEXPORT Singleton
56{
57protected:
58// TODO: Come up with something better than this!
59// TODO:
60// TODO: This super-nasty piece of nastiness was put in for continued
61// TODO: compatability with MSVC++ and MinGW - the latter apparently
62// TODO: needs this.
63 static
64#ifdef __MINGW32__
65 CEGUIEXPORT
66#endif
67 T* ms_Singleton;
68
69public:
70 Singleton( void )
71 {
72 assert( !ms_Singleton );
73 ms_Singleton = static_cast<T*>(this);
74 }
75 ~Singleton( void )
76 { assert( ms_Singleton ); ms_Singleton = 0; }
77 static T& getSingleton( void )
78 { assert( ms_Singleton ); return ( *ms_Singleton ); }
79 static T* getSingletonPtr( void )
80 { return ( ms_Singleton ); }
81
82private:
83 Singleton& operator=(const Singleton&) { return *this; }
84 Singleton(const Singleton&) {}
85};
86
87} // End of CEGUI namespace section
88
89
90
91#endif // end of guard _CEGUISingleton_h_
Definition: Singleton.h:56
Main namespace for Crazy Eddie's GUI Library.
Definition: arch_overview.dox:1