/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2007 University of Washington
* All rights reserved.
*
* 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
*/
#ifndef DROPTAIL_H
#define DROPTAIL_H
#include <queue>
#include "ns3/packet.h"
#include "ns3/queue.h"
#include "ns3/component-manager.h"
namespace ns3 {
class TraceContainer;
const int DTQ_NPACKETS_MAX_DEFAULT = 100;
/**
* \brief A FIFO packet queue that drops tail-end packets on overflow
*/
class DropTailQueue : public Queue {
public:
static const ClassId cid;
/**
* \brief DropTailQueue Constructor
*
* Creates a droptail queue with a maximum size of 100 packets by default
*/
DropTailQueue ();
virtual ~DropTailQueue();
/**
* \param npackets The maximum number of packets this queue will hold before
* dropping packets.
*/
void SetMaxPackets (uint32_t npackets);
/**
* \return The maximum number of packets this queue will hold before dropping
* packets.
*/
uint32_t GetMaxPackets (void);
private:
virtual bool DoEnqueue (const Packet& p);
virtual bool DoDequeue (Packet &p);
virtual bool DoPeek (Packet &p);
private:
std::queue<Packet> m_packets;
uint32_t m_maxPackets;
};
}; // namespace ns3
#endif /* DROPTAIL_H */