/*
  Subsys  -  interface for describing an application part to be handled by main() 

  Copyright (C)         Lumiera.org
    2008,               Hermann Vosseler <Ichthyostega@web.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 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 General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

* *****************************************************/


/** @file subsys.cpp
 ** Implementation details of a »subsystem descriptor«.
 ** The application is split into various such subsystems,
 ** which are prompted by main() to start/stop.
 ** 
 ** @see subsystem-runner.hpp
 ** @see lumiera::AppState
 ** @see facade.cpp
 ** @see main.cpp
 ** 
 */


#include "common/subsys.hpp"


namespace lumiera {
  
  
  
  
  Subsys::~Subsys()  { }
  
  
  
  Subsys&
  Subsys::depends (Subsys& prereq)
  {
    prereq_.push_back(&prereq);
    return *this;
  }
  
  
  
  bool
  Subsys::isRunning()  noexcept
  {
    return checkRunningState();
  }
  
  
  
  
  
} // namespace lumiera