src/util/currenton.hpp

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/*
**  Windstille - A Sci-Fi Action-Adventure Game
**  Copyright (C) 2009 Ingo Ruhnke <grumbel@gmx.de>
**
**  This program is free software: you can redistribute it and/or modify
**  it under the terms of the GNU General Public License as published by
**  the Free Software Foundation, either version 3 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 General Public License for more details.
**  
**  You should have received a copy of the GNU General Public License
**  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef HEADER_WINDSTILLE_UTIL_CURRENTON_HPP
#define HEADER_WINDSTILLE_UTIL_CURRENTON_HPP

#include <assert.h>

template<class C>
class Currenton
{
private:
  static C* s_current; 

protected:
  Currenton()  
  { 
    // FIXME: temporarly disabled, as Sector() for the main menu,
    // doesn't get cleaned up before a real Sector() starts
    // assert(!s_current); 
    s_current = static_cast<C*>(this); 
  }

  virtual ~Currenton()
  {
    s_current = 0; 
  }
  
public:
  static C* current() { return s_current; }
};

template<class C> C* Currenton<C>::s_current = 0;

#endif

/* EOF */

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