SingletonT.hh
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1 /*
2  * Copyright (C) 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 
25 #include "gazebo/util/system.hh"
26 
29 
32 template <class T>
33 class GZ_COMMON_VISIBLE SingletonT
34 {
36  public: static T *Instance()
37  {
38  return &GetInstance();
39  }
40 
42  protected: SingletonT() {}
43 
45  protected: virtual ~SingletonT() {}
46 
48  private: static T &GetInstance()
49  {
50  static T t;
51  return static_cast<T &>(t);
52  }
53 
55  private: static T &myself;
56 };
57 
59 template <class T>
62 
63 #endif
Singleton template class.
Definition: SingletonT.hh:33
virtual ~SingletonT()
Destructor.
Definition: SingletonT.hh:45
SingletonT()
Constructor.
Definition: SingletonT.hh:42
static T * Instance()
Get an instance of the singleton.
Definition: SingletonT.hh:36