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 1

#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>
#include <iostream>

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() { }

            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