104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
// src/backend/history.hh - Copyright 2005, 2006, University
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// of Padova, dept. of Pure and Applied
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// Mathematics
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//
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// This file is part of SGPEMv2.
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//
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// This is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// SGPEMv2 is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with SGPEMv2; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#ifndef HISTORY_HH
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#define HISTORY_HH 1
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#include "config.h"
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#include <vector>
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#include <iostream>
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#include "slice.hh"
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#include "observed_subject.hh"
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#include "schedulable_list.hh"
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#include "schedulable_status.hh"
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#include "../templates/smartp.hh"
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namespace sgpem
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{
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/** \brief Manages the history of the simulation
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Manages the history of the simulation from the instant 0 to the current time,
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i.e. permits to know the state of each schedulable object inside this time interval.
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In particoular it's possible to know which entity was running at a precise moment.
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In a future iteration it will be possible to revert the entire simulation to a state
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present in the history ("undo operation")
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*/
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class History;
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class SG_DLLEXPORT History : public ObservedSubject
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{
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public:
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/**
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Gets the \ref Schedulable object running at the specified time.
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\param time The inquired time instant.
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\return The Schedulable object running at the given time.
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*/
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memory::smart_ptr<sgpem::SchedulableStatus> get_scheduled_at(int time) const;
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/**
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Gets the status of simulation at the specified time.
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\param time The inquired time instant.
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\return The list of Schedulable status objects at the specified time.
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*/
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memory::smart_ptr<sgpem::SchedulableList> get_simulation_status_at(int time) const;
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/**
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Gets the current time.
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\return The current history time.
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*/
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int get_current_time() const;
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/**
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Sets the status of simulation at the current time.
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\param status The list of \ref Schedulable status objects at the current time.
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*/
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void enqueue_slice(const sgpem::SchedulableList& status);
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/**
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Remove all data in History following the specified time.
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\param instant Desired cutting time.
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*/
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void truncate_at(int instant);
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/**
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Gets the only instance of History.
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\return The Singleton instance of this object.
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*/
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static History& get_instance();
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private:
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History(int); //private constructor. The parameter is discarded
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static History _instance;
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int _total_time_elapsed;
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std::vector<sgpem::Slice> _slices;
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};
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}//~ namespace sgpem
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#endif //HISTORY_H
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