appstate.hpp

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/*
  APPSTATE.hpp  -  application initialisation and behaviour

  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.

*/

#ifndef LUMIERA_APPSTATE_H
#define LUMIERA_APPSTATE_H

#include "lib/symbol.hpp"
#include "lib/nocopy.hpp"
#include "lib/depend.hpp"
#include "common/option.hpp"
#include "common/subsys.hpp"
#include "common/basic-setup.hpp"

#include <memory>
#include <string>
#include <map>



namespace lumiera {
  
  using std::string;
  
  class SubsystemRunner;
  
  
  class AppState
    : util::NonCopyable
    {
    private:
      AppState ();
      
     ~AppState ();
      friend class lib::DependencyFactory<AppState>;
      
      
    public:
      static lib::Depend<AppState> instance;
      
      
      void init (lumiera::Option& options);
      
      
      string fetchSetupValue (lib::Literal key);
      
      
      void maybeStart (lumiera::Subsys&);
      
      
      enum ExitCode {
        NORMAL_EXIT,
        CLEAN_EXIT_AFTER_ERROR,
        CLEAN_EMERGENCY_EXIT,
        FAILED_EMERGENCY_EXIT
      };
      
      ExitCode maybeWait();
      
      
      ExitCode abort (lumiera::Error& problem);
      
      
      ExitCode abort ()  noexcept;
      
      
      
    private:
      using PSub = std::unique_ptr<SubsystemRunner>;
      
      BasicSetup setup_;
      
      PSub  subsystems_;
      
      bool emergency_;
      bool core_up_;
      
    };
  
  
} // namespace lumiera

#endif