src/framework/Policies/Singleton.h

   1 /*
   2  * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   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
  19 #ifndef MANGOS_SINGLETON_H
  20 #define MANGOS_SINGLETON_H
  21
  22 /**
  23  * @brief class Singleton
  24  */
  25
  26 #include "CreationPolicy.h"
  27 #include "ThreadingModel.h"
  28 #include "ObjectLifeTime.h"
  29
  30 namespace MaNGOS
  31 {
  32     template
  33         <
  34         typename T,
  35         class ThreadingModel = MaNGOS::SingleThreaded<T>,
  36         class CreatePolicy = MaNGOS::OperatorNew<T>,
  37         class LifeTimePolicy = MaNGOS::ObjectLifeTime<T>
  38         >
  39         class MANGOS_DLL_DECL Singleton
  40     {
  41         public:
  42             static T& Instance();
  43
  44         protected:
  45             Singleton() {};
  46
  47         private:
  48
  49             // Prohibited actions...this does not prevent hijacking.
  50             Singleton(const Singleton &);
  51             Singleton& operator=(const Singleton &);
  52
  53             // Singleton Helpers
  54             static void DestroySingleton();
  55
  56             // data structure
  57             typedef typename ThreadingModel::Lock Guard;
  58             static T *si_instance;
  59             static bool si_destroyed;
  60     };
  61 }
  62 #endif