KeosSingleton.h

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/*
 * This source file is part of KEOS (Free 3D Engine)
 * For the latest info, see http://www.keosengine.org/
 * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 */

#ifndef KEOS_SINGLETON_H
#define KEOS_SINGLETON_H

#include "KeosPrerequisites.h"

namespace Keos
{
  //-----------------------------------------------------------------------
  template <class T>
  class CSingleton
  {
  public :

    static void Create()
    {
      if (!ms_pInst)
        ms_pInst = new T;
    }

    static T& Instance()
    {
      if (!ms_pInst)
        ms_pInst = new T;

      return *ms_pInst;
    }

    static void Destroy()
    {
      delete ms_pInst;
      ms_pInst = NULL;
    }

    static void _SetInstance(T* pInst)
    {
      ms_pInst = pInst;
    }

  protected :

    CSingleton()
    {}

    ~CSingleton()
    {}

  private :

    static T* ms_pInst;

    CSingleton(CSingleton&);

    void operator =(CSingleton&);
  };

  // Instance initialisation
  template <class T> T* CSingleton<T>::ms_pInst = NULL;

} // namespace Keos

#endif // KEOS_SINGLETON_H

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