Colobot
singleton.h
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1 /*
2  * This file is part of the Colobot: Gold Edition source code
3  * Copyright (C) 2001-2016, Daniel Roux, EPSITEC SA & TerranovaTeam
4  * http://epsitec.ch; http://colobot.info; http://github.com/colobot
5  *
6  * This program is free software: you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation, either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14  * See the GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program. If not, see http://gnu.org/licenses
18  */
19 
25 #pragma once
26 
27 #include <cassert>
28 
29 
30 template<typename T> class CSingleton
31 {
32 protected:
33  static T* m_instance;
34 
35 public:
36  static T& GetInstance()
37  {
38  assert(m_instance != nullptr);
39  return *m_instance;
40  }
41 
42  static T* GetInstancePointer()
43  {
44  assert(m_instance != nullptr);
45  return m_instance;
46  }
47 
48  static bool IsCreated()
49  {
50  return m_instance != nullptr;
51  }
52 
53  CSingleton()
54  {
55  assert(m_instance == nullptr);
56  m_instance = static_cast<T *>(this);
57  }
58 
59  virtual ~CSingleton()
60  {
61  m_instance = nullptr;
62  }
63 
64  #ifdef TESTS
65  static void ReplaceInstance(T* newInstance)
66  {
67  m_instance = newInstance;
68  }
69  #endif
70 
71 private:
72  CSingleton& operator=(const CSingleton<T> &) = delete;
73  CSingleton(const CSingleton<T> &) = delete;
74 };
75 
Definition: singleton.h:30