pfifo-fast-queue-disc.h

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/*
 * Copyright (c) 2007, 2014 University of Washington
 *               2015 Universita' degli Studi di Napoli Federico II
 *
 * 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
 *
 * Authors:  Stefano Avallone <stavallo@unina.it>
 *           Tom Henderson <tomhend@u.washington.edu>
 */
 
#ifndef PFIFO_FAST_H
#define PFIFO_FAST_H
 
#include "queue-disc.h"
 
namespace ns3
{
 
class PfifoFastQueueDisc : public QueueDisc
{
  public:
    static TypeId GetTypeId();
    PfifoFastQueueDisc();
 
    ~PfifoFastQueueDisc() override;
 
    // Reasons for dropping packets
    static constexpr const char* LIMIT_EXCEEDED_DROP =
        "Queue disc limit exceeded"; 
 
  private:
    static const uint32_t prio2band[16];
 
    bool DoEnqueue(Ptr<QueueDiscItem> item) override;
    Ptr<QueueDiscItem> DoDequeue() override;
    Ptr<const QueueDiscItem> DoPeek() override;
    bool CheckConfig() override;
    void InitializeParams() override;
};
 
} // namespace ns3
 
#endif /* PFIFO_FAST_H */