calendar-scheduler.h

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/*
 * Copyright (c) 2009 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>
 * Author: Alexander Krotov <krotov@iitp.ru>
 */
 
#ifndef CALENDAR_SCHEDULER_H
#define CALENDAR_SCHEDULER_H
 
#include "scheduler.h"
 
#include <list>
#include <stdint.h>
 
namespace ns3
{
 
class EventImpl;
 
class CalendarScheduler : public Scheduler
{
  public:
    static TypeId GetTypeId();
 
    CalendarScheduler();
    ~CalendarScheduler() 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:
    void ResizeUp();
    void ResizeDown();
    void Resize(uint32_t newSize);
    uint64_t CalculateNewWidth();
    void Init(uint32_t nBuckets, uint64_t width, uint64_t startPrio);
    inline uint32_t Hash(uint64_t key) const;
    void PrintInfo();
    void DoResize(uint32_t newSize, uint64_t newWidth);
    Scheduler::Event DoRemoveNext();
    void DoInsert(const Scheduler::Event& ev);
 
    typedef std::list<Scheduler::Event> Bucket;
 
    Bucket* m_buckets;
    uint32_t m_nBuckets;
    uint64_t m_width;
    uint32_t m_lastBucket;
    uint64_t m_bucketTop;
    uint64_t m_lastPrio;
    uint32_t m_qSize;
 
    void SetReverse(bool reverse);
    Scheduler::Event& (*NextEvent)(Bucket& bucket);
    bool (*Order)(const EventKey& newEvent, const EventKey& it);
    void (*Pop)(Bucket&);
    bool m_reverse = false;
};
 
} // namespace ns3
 
#endif /* CALENDAR_SCHEDULER_H */