author | Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
Tue, 15 Jan 2008 12:36:22 +0100 | |
changeset 2250 | 18f432098389 |
parent 2232 | 9abd038ee588 |
child 2251 | 04963d8cca51 |
permissions | -rw-r--r-- |
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/* -*- 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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|
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// The queue base class does not have any limit based on the number |
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// of packets or number of bytes. It is, conceptually, infinite |
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// by default. Only subclasses define limitations. |
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// The base class implements tracing and basic statistics calculations. |
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#ifndef QUEUE_H |
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#define QUEUE_H |
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#include <string> |
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#include <list> |
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#include "ns3/packet.h" |
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#include "ns3/object.h" |
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#include "ns3/callback-trace-source.h" |
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#include "ns3/trace-resolver.h" |
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#include "ns3/trace-context-element.h" |
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namespace ns3 { |
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class StringEnumDefaultValue; |
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/** |
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* \brief hold in a TraceContext the type of a trace source |
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*/ |
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class QueueTraceType : public TraceContextElement |
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{ |
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public: |
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enum Type { |
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ENQUEUE, |
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DEQUEUE, |
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DROP |
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}; |
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static uint16_t GetUid (void); |
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QueueTraceType (); |
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QueueTraceType (enum Type type); |
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/** |
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* \returns true if this is an enqueue event, false otherwise. |
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*/ |
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bool IsEnqueue (void) const; |
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/** |
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* \returns true if this is a dequeue event, false otherwise. |
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*/ |
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bool IsDequeue (void) const; |
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/** |
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* \returns true if this is a drop event, false otherwise. |
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*/ |
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bool IsDrop (void) const; |
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void Print (std::ostream &os) const; |
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std::string GetTypeName (void) const; |
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private: |
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enum Type m_type; |
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}; |
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/** |
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* \brief Abstract base class for packet Queues |
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* |
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* This class defines the base APIs for packet queues in the ns-3 system |
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*/ |
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class Queue : public Object |
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{ |
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public: |
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static TypeId iid (void); |
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Queue (); |
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virtual ~Queue (); |
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/** |
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* \return true if the queue is empty; false otherwise |
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*/ |
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bool IsEmpty (void) const; |
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/** |
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* Place a packet into the rear of the Queue |
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* \return True if the operation was successful; false otherwise |
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*/ |
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bool Enqueue (Ptr<Packet> p); |
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/** |
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* Remove a packet from the front of the Queue |
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* \return 0 if the operation was not successful; the packet otherwise. |
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*/ |
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Ptr<Packet> Dequeue (void); |
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/** |
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* Get a copy of the item at the front of the queue without removing it |
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* \return 0 if the operation was not successful; the packet otherwise. |
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*/ |
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Ptr<Packet> Peek (void) const; |
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/** |
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* XXX Doesn't do anything right now, think its supposed to flush the queue |
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*/ |
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void DequeueAll (void); |
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/** |
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* \return The number of packets currently stored in the Queue |
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*/ |
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uint32_t GetNPackets (void) const; |
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/** |
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* \return The number of bytes currently occupied by the packets in the Queue |
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*/ |
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uint32_t GetNBytes (void) const; |
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/** |
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* \return The total number of bytes recieved by this Queue since the |
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* simulation began, or since ResetStatistics was called, according to |
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* whichever happened more recently |
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* |
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*/ |
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uint32_t GetTotalReceivedBytes (void) const; |
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/** |
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* \return The total number of packets recieved by this Queue since the |
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* simulation began, or since ResetStatistics was called, according to |
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* whichever happened more recently |
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*/ |
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uint32_t GetTotalReceivedPackets (void) const; |
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/** |
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* \return The total number of bytes dropped by this Queue since the |
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* simulation began, or since ResetStatistics was called, according to |
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* whichever happened more recently |
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*/ |
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uint32_t GetTotalDroppedBytes (void) const; |
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/** |
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* \return The total number of bytes dropped by this Queue since the |
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* simulation began, or since ResetStatistics was called, according to |
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* whichever happened more recently |
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*/ |
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uint32_t GetTotalDroppedPackets (void) const; |
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/** |
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* Resets the counts for dropped packets, dropped bytes, recieved packets, and |
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* recieved bytes. |
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*/ |
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void ResetStatistics (void); |
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#if 0 |
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// average calculation requires keeping around |
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// a buffer with the date of arrival of past received packets |
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// which are within the average window |
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// so, it is quite costly to do it all the time. |
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// Hence, it is disabled by default and must be explicitely |
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// enabled with this method which specifies the size |
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// of the average window in time units. |
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void EnableRunningAverage (Time averageWindow); |
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void DisableRunningAverage (void); |
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// average |
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double GetQueueSizeAverage (void); |
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162 |
double GetReceivedBytesPerSecondAverage (void); |
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double GetReceivedPacketsPerSecondAverage (void); |
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double GetDroppedBytesPerSecondAverage (void); |
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double GetDroppedPacketsPerSecondAverage (void); |
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166 |
// variance |
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double GetQueueSizeVariance (void); |
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double GetReceivedBytesPerSecondVariance (void); |
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double GetReceivedPacketsPerSecondVariance (void); |
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double GetDroppedBytesPerSecondVariance (void); |
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171 |
double GetDroppedPacketsPerSecondVariance (void); |
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172 |
#endif |
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173 |
|
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private: |
627 | 175 |
|
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virtual bool DoEnqueue (Ptr<Packet> p) = 0; |
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virtual Ptr<Packet> DoDequeue (void) = 0; |
1870 | 178 |
virtual Ptr<Packet> DoPeek (void) const = 0; |
264
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179 |
|
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protected: |
1383 | 181 |
Ptr<TraceResolver> GetTraceResolver (void) const; |
264
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// called by subclasses to notify parent of packet drops. |
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void Drop (Ptr<Packet> packet); |
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184 |
|
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185 |
private: |
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CallbackTraceSource<Ptr<const Packet> > m_traceEnqueue; |
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CallbackTraceSource<Ptr<const Packet> > m_traceDequeue; |
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CallbackTraceSource<Ptr<const Packet> > m_traceDrop; |
264
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189 |
|
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uint32_t m_nBytes; |
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191 |
uint32_t m_nTotalReceivedBytes; |
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uint32_t m_nPackets; |
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uint32_t m_nTotalReceivedPackets; |
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uint32_t m_nTotalDroppedBytes; |
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uint32_t m_nTotalDroppedPackets; |
317
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196 |
|
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197 |
public: |
627 | 198 |
/** |
199 |
* A factory method to generate a preconfigured default Queue for use |
|
200 |
* \return a Queue smart pointer that is the default Queue type defined |
|
201 |
*/ |
|
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static Ptr<Queue> CreateDefault (void); |
264
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203 |
}; |
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204 |
|
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205 |
}; // namespace ns3 |
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206 |
|
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#endif /* QUEUE_H */ |