OgreSingleton.h
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1 /*
2 -----------------------------------------------------------------------------
3 This source file is part of OGRE
4  (Object-oriented Graphics Rendering Engine)
5 For the latest info, see http://www.ogre3d.org/
6 
7 Copyright (c) 2000-2013 Torus Knot Software Ltd
8 
9 Permission is hereby granted, free of charge, to any person obtaining a copy
10 of this software and associated documentation files (the "Software"), to deal
11 in the Software without restriction, including without limitation the rights
12 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 copies of the Software, and to permit persons to whom the Software is
14 furnished to do so, subject to the following conditions:
15 
16 The above copyright notice and this permission notice shall be included in
17 all copies or substantial portions of the Software.
18 
19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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26 -----------------------------------------------------------------------------
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28 /* Original version Copyright (C) Scott Bilas, 2000.
29  * All rights reserved worldwide.
30  *
31  * This software is provided "as is" without express or implied
32  * warranties. You may freely copy and compile this source into
33  * applications you distribute provided that the copyright text
34  * below is included in the resulting source code, for example:
35  * "Portions Copyright (C) Scott Bilas, 2000"
36  */
37 #ifndef _SINGLETON_H__
38 #define _SINGLETON_H__
39 
40 // Added by Steve Streeting for Ogre
41 #include "OgrePrerequisites.h"
42 
43 #if OGRE_COMPILER == OGRE_COMPILER_MSVC
44 // Turn off warnings generated by this singleton implementation
45 # pragma warning (disable : 4311)
46 # pragma warning (disable : 4312)
47 # pragma warning (disable : 4661)
48 #endif
49 
50 #if defined ( OGRE_GCC_VISIBILITY )
51 # pragma GCC visibility push(default)
52 #endif
53 namespace Ogre {
61 // End SJS additions
64  template <typename T> class Singleton
65  {
66  private:
68  Singleton(const Singleton<T> &);
69 
72 
73  protected:
74 
75  static T* msSingleton;
76 
77  public:
78  Singleton( void )
79  {
80  assert( !msSingleton );
81 #if defined( _MSC_VER ) && _MSC_VER < 1200
82  int offset = (int)(T*)1 - (int)(Singleton <T>*)(T*)1;
83  msSingleton = (T*)((int)this + offset);
84 #else
85  msSingleton = static_cast< T* >( this );
86 #endif
87  }
88  ~Singleton( void )
89  { assert( msSingleton ); msSingleton = 0; }
90  static T& getSingleton( void )
91  { assert( msSingleton ); return ( *msSingleton ); }
92  static T* getSingletonPtr( void )
93  { return msSingleton; }
94  };
98 }
99 #if defined ( OGRE_GCC_VISIBILITY )
100 # pragma GCC visibility pop
101 #endif
102 
103 #endif
static T * msSingleton
Definition: OgreSingleton.h:75
static T * getSingletonPtr(void)
Definition: OgreSingleton.h:92
static T & getSingleton(void)
Definition: OgreSingleton.h:90
Template class for creating single-instance global classes.
Definition: OgreSingleton.h:64
Singleton & operator=(const Singleton< T > &)
Private operator= .

Copyright © 2013 Torus Knot Software Ltd
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Last modified Sat Dec 14 2013 14:35:50