A Discrete-Event Network Simulator
API
pfifo-fast-queue-disc.h
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3  * Copyright (c) 2007, 2014 University of Washington
4  * 2015 Universita' degli Studi di Napoli Federico II
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19  * Authors: Stefano Avallone <stavallo@unina.it>
20  * Tom Henderson <tomhend@u.washington.edu>
21  */
22 
23 #ifndef PFIFO_FAST_H
24 #define PFIFO_FAST_H
25 
26 #include "ns3/queue-disc.h"
27 
28 namespace ns3 {
29 
49 class PfifoFastQueueDisc : public QueueDisc {
50 public:
55  static TypeId GetTypeId (void);
62 
63  virtual ~PfifoFastQueueDisc();
64 
65  // Reasons for dropping packets
66  static constexpr const char* LIMIT_EXCEEDED_DROP = "Queue disc limit exceeded";
67 
68 private:
73  static const uint32_t prio2band[16];
74 
75  virtual bool DoEnqueue (Ptr<QueueDiscItem> item);
76  virtual Ptr<QueueDiscItem> DoDequeue (void);
77  virtual Ptr<const QueueDiscItem> DoPeek (void);
78  virtual bool CheckConfig (void);
79  virtual void InitializeParams (void);
80 };
81 
82 } // namespace ns3
83 
84 #endif /* PFIFO_FAST_H */
Linux pfifo_fast is the default priority queue enabled on Linux systems.
virtual Ptr< const QueueDiscItem > DoPeek(void)
Return a copy of the next packet the queue disc will extract.
static TypeId GetTypeId(void)
Get the type ID.
virtual bool CheckConfig(void)
Check whether the current configuration is correct.
virtual Ptr< QueueDiscItem > DoDequeue(void)
This function actually extracts a packet from the queue disc.
virtual bool DoEnqueue(Ptr< QueueDiscItem > item)
This function actually enqueues a packet into the queue disc.
static constexpr const char * LIMIT_EXCEEDED_DROP
Packet dropped due to queue disc limit exceeded.
virtual void InitializeParams(void)
Initialize parameters (if any) before the first packet is enqueued.
static const uint32_t prio2band[16]
Priority to band map.
PfifoFastQueueDisc()
PfifoFastQueueDisc constructor.
Smart pointer class similar to boost::intrusive_ptr.
Definition: ptr.h:74
QueueDisc is an abstract base class providing the interface and implementing the operations common to...
Definition: queue-disc.h:181
a unique identifier for an interface.
Definition: type-id.h:59
Every class exported by the ns3 library is enclosed in the ns3 namespace.