list-scheduler.h

Go to the documentation of this file.

/*
 * Copyright (c) 2005 INRIA
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
 */
 
#ifndef LIST_SCHEDULER_H
#define LIST_SCHEDULER_H
 
#include "scheduler.h"
 
#include <list>
#include <stdint.h>
#include <utility>
 
/**
 * \file
 * \ingroup scheduler
 * ns3::ListScheduler declaration.
 */
 
namespace ns3
{
 
class EventImpl;
 
/**
 * \ingroup scheduler
 * \brief a std::list event scheduler
 *
 * This class implements an event scheduler using an std::list
 * data structure, that is, a double linked-list.
 *
 * \par Time Complexity
 *
 * Operation    | Amortized %Time | Reason
 * :----------- | :-------------- | :-----
 * Insert()     | Linear          | Linear search in `std::list`
 * IsEmpty()    | Constant        | `std::list::size()`
 * PeekNext()   | Constant        | `std::list::front()`
 * Remove()     | Linear          | Linear search in `std::list`
 * RemoveNext() | Constant        | `std::list::pop_front()`
 *
 * \par Memory Complexity
 *
 * Category  | Memory                           | Reason
 * :-------- | :------------------------------- | :-----
 * Overhead  | 2 x `sizeof (*)` + `size_t`<br/>(24 bytes) | `std::list`
 * Per Event | 2 x `sizeof (*)`                 | `std::list`
 *
 */
class ListScheduler : public Scheduler
{
  public:
    /**
     *  Register this type.
     *  \return The object TypeId.
     */
    static TypeId GetTypeId();
 
    /** Constructor. */
    ListScheduler();
    /** Destructor. */
    ~ListScheduler() override;
 
    // Inherited
    void Insert(const Scheduler::Event& ev) override;
    bool IsEmpty() const override;
    Scheduler::Event PeekNext() const override;
    Scheduler::Event RemoveNext() override;
    void Remove(const Scheduler::Event& ev) override;
 
  private:
    /** Event list type: a simple list of Events. */
    typedef std::list<Scheduler::Event> Events;
    /** Events iterator. */
    typedef std::list<Scheduler::Event>::iterator EventsI;
 
    /** The event list. */
    Events m_events;
};
 
} // namespace ns3
 
#endif /* LIST_SCHEDULER_H */