artis-star/src/artis-star/kernel/sss/Coordinator.hpp

/**
 * @file kernel/sss/Coordinator.hpp
 * @author The ARTIS Development Team
 * See the AUTHORS or Authors.txt file
 */

/*
 * ARTIS - the multimodeling and simulation environment
 * This file is a part of the ARTIS environment
 *
 * Copyright (C) 2013-2019 ULCO http://www.univ-littoral.fr
 *
 * 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 SSS_COORDINATOR
#define SSS_COORDINATOR

#include <artis-star/common/Coordinator.hpp>
#include <artis-star/common/Parameters.hpp>
#include <artis-star/common/utils/Trace.hpp>

#include <artis-star/kernel/sss/Model.hpp>

#include <cassert>

namespace artis {
namespace sss {

template<class Time>
class Parameters
{
public:
  Parameters(typename Time::type time_step)
      : _time_step(time_step)
  {}

  typename Time::type _time_step;
};

template<class Time, class Policy, class GraphManager,
    class Parameters = Parameters<Time>,
    class GraphParameters = common::NoParameters>
class Coordinator : public common::Coordinator<Time>,
                    public sss::Model<Time>
{
  typedef Coordinator<Time, Policy, GraphManager,
                      Parameters, GraphParameters> type;

public:
  typedef Parameters parameters_type;
  typedef GraphParameters graph_parameters_type;

  Coordinator(const std::string &name,
              const Parameters &parameters,
              const GraphParameters &graph_parameters)
      :
      common::Model<Time>(name),
      common::Coordinator<Time>(name),
      sss::Model<Time>(name),
      _graph_manager(this, graph_parameters),
      _time_step(parameters._time_step)
  {}

  virtual ~Coordinator()
  {}

  GraphManager &get_graph_manager()
  { return _graph_manager; }

  const GraphManager &get_graph_manager() const
  { return _graph_manager; }

  virtual bool is_atomic() const
  { return common::Coordinator<Time>::is_atomic(); }

  virtual std::string to_string(int level) const
  { return common::Coordinator<Time>::to_string(level); }

  typename Time::type start(const typename Time::type &t)
  {
    assert(_graph_manager.children().size() > 0);

    type::_tl = t;
    type::_tn = t;
    for (auto &child : _graph_manager.children()) {
      child->start(t);
    }
    return type::_tn;
  }

  typename Time::type dispatch_events(const common::Bag<Time> &bag,
                                      const typename Time::type &t)
  {
    _graph_manager.dispatch_events(bag, t);
    return type::_tn;
  }

  void observation(std::ostream &file) const
  {
    for (auto &child : _graph_manager.children()) {
      child->observation(file);
    }
  }

  void output(const typename Time::type &t)
  {
    if (t == type::_tn) {
      for (auto &model : _graph_manager.children()) {
        model->update_buffer(t);
      }
      for (auto &model : _graph_manager.children()) {
        if (not model->is_send() && model->is_marked()) {
          model->output(t);
          model->send();
        }
      }
    }
  }

  void post_event(const typename Time::type &t,
                  const common::ExternalEvent<Time> &event)
  {
    if (t == type::_tn) {
      _graph_manager.post_event(t, event);
    } else {
      _policy(t, event, type::_tl, type::_tn);
    }
  }

  typename Time::type transition(const typename Time::type &t)
  {
    if (t == type::_tn) {
      bool end = true;

      for (auto &event : _policy.bag()) {
        post_event(t, event);
      }
      for (auto &model : _graph_manager.children()) {
        if (not model->is_marked()) {
          if (model->all_ports_are_assigned()) {
            model->transition(t);
            model->mark();
            end = false;
          } else {
            end = false;
          }
        } else {
          if (not model->is_send()) {
            end = false;
          } else {
            if (t == model->get_tn()) {
              model->transition(t);
            }
          }
        }
      }

      if (end) {
        for (auto &model : _graph_manager.children()) {
          model->unmark();
          model->unsend();
        }
        type::_tl = t;
        type::_tn = t + _time_step;
      }
    }
    type::clear_bag();
    return type::_tn;
  }

  virtual void update_buffer(typename Time::type /* time */)
  {}

private:
  GraphManager _graph_manager;
  typename Time::type _time_step;
  Policy _policy;
};

}
} // namespace artis sss

#endif