121 lines
2.6 KiB
C++
121 lines
2.6 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2007 University of Washington
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "ns3/debug.h"
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#include "drop-tail.h"
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NS_DEBUG_COMPONENT_DEFINE ("DropTailQueue");
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namespace ns3 {
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static class QueueStackInitializationClass {
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public:
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QueueStackInitializationClass () {
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Queue::Default (DropTailQueue ());
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}
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} queue_stack_initialization_class;
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DropTailQueue::DropTailQueue () :
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Queue (),
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m_packets (),
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m_maxPackets(DTQ_NPACKETS_MAX_DEFAULT)
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{
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NS_DEBUG("DropTailQueue::DropTailQueue ()");
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}
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DropTailQueue::~DropTailQueue ()
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{
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NS_DEBUG("DropTailQueue::~DropTailQueue ()");
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}
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DropTailQueue* DropTailQueue::Copy() const
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{
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return new DropTailQueue(*this);
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}
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void
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DropTailQueue::SetMaxPackets (uint32_t npackets)
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{
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NS_DEBUG("DropTailQueue::SetMaxPackets (" << npackets << ")");
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m_maxPackets = npackets;
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}
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uint32_t
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DropTailQueue::GetMaxPackets (void)
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{
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NS_DEBUG("DropTailQueue::GetMaxPackets () <= " << m_maxPackets);
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return m_maxPackets;
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}
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bool
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DropTailQueue::DoEnqueue (const Packet& p)
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{
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NS_DEBUG("DropTailQueue::DoEnqueue (" << &p << ")");
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if (m_packets.size () >= m_maxPackets)
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{
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NS_DEBUG("DropTailQueue::DoEnqueue (): Queue full -- droppping pkt");
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Drop (p);
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return false;
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}
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m_packets.push(p);
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return true;
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}
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bool
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DropTailQueue::DoDequeue (Packet& p)
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{
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NS_DEBUG("DropTailQueue::DoDequeue (" << &p << ")");
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if (m_packets.empty())
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{
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NS_DEBUG("DropTailQueue::DoDequeue (): Queue empty");
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return false;
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}
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p = m_packets.front ();
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m_packets.pop ();
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NS_DEBUG("DropTailQueue::DoDequeue (): Popped " << &p << " <= true");
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return true;
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}
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bool
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DropTailQueue::DoPeek (Packet& p)
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{
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NS_DEBUG("DropTailQueue::DoPeek (" << &p << ")");
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if (m_packets.empty())
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{
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NS_DEBUG("DropTailQueue::DoPeek (): Queue empty");
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return false;
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}
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p = m_packets.front ();
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return true;
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}
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}; // namespace ns3
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