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SingletonT.hh
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1 /*
2  * Copyright 2012 Open Source Robotics Foundation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16 */
17 /* Desc: Singleton base class
18  * Author: Nate Koenig
19  * Date: 2 Sept 2007
20  */
21 
22 #ifndef _SINGLETONT_HH_
23 #define _SINGLETONT_HH_
24 
27 
30 template <class T>
32 {
34  public: static T *Instance()
35  {
36  return &GetInstance();
37  }
38 
40  protected: SingletonT() {}
41 
43  protected: virtual ~SingletonT() {}
44 
46  private: static T &GetInstance()
47  {
48  static T t;
49  return static_cast<T &>(t);
50  }
51 
53  private: static T &myself;
54 };
55 
57 template <class T>
60 
61 #endif
62 
63