A Discrete-Event Network Simulator
API
singleton.h
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2007 INRIA
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
19  */
20 #ifndef SINGLETON_H
21 #define SINGLETON_H
22 
23 #include "non-copyable.h"
24 
25 
32 namespace ns3 {
33 
62 template <typename T>
63 class Singleton : private NonCopyable
64 {
65 public:
74  static T *Get (void);
75 
76 };
77 
78 } // namespace ns3
79 
80 
81 /********************************************************************
82  * Implementation of the templates declared above.
83  ********************************************************************/
84 
85 namespace ns3 {
86 
87 template <typename T>
88 T *
89 Singleton<T>::Get (void)
90 {
91  static T object;
92  return &object;
93 }
94 
95 
96 } // namespace ns3
97 
98 #endif /* SINGLETON_H */
ns3::NonCopyable
A base class for (non-Singleton) objects which shouldn't be copied.
Definition: non-copyable.h:54
non-copyable.h
ns3::NonCopyable declaration.
ns3::Singleton::Get
static T * Get(void)
Get a pointer to the singleton instance.
Definition: singleton.h:89
ns3::Singleton
A template singleton.
Definition: singleton.h:63
ns3
Every class exported by the ns3 library is enclosed in the ns3 namespace.