A Discrete-Event Network Simulator
API
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pfifo-fast-queue-disc.h
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1/*
2 * Copyright (c) 2007, 2014 University of Washington
3 * 2015 Universita' degli Studi di Napoli Federico II
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation;
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Authors: Stefano Avallone <stavallo@unina.it>
19 * Tom Henderson <tomhend@u.washington.edu>
20 */
21
22#ifndef PFIFO_FAST_H
23#define PFIFO_FAST_H
24
25#include "queue-disc.h"
26
27namespace ns3
28{
29
50{
51 public:
56 static TypeId GetTypeId();
63
64 ~PfifoFastQueueDisc() override;
65
66 // Reasons for dropping packets
67 static constexpr const char* LIMIT_EXCEEDED_DROP =
68 "Queue disc limit exceeded";
69
70 private:
75 static const uint32_t prio2band[16];
76
77 bool DoEnqueue(Ptr<QueueDiscItem> item) override;
80 bool CheckConfig() override;
81 void InitializeParams() override;
82};
83
84} // namespace ns3
85
86#endif /* PFIFO_FAST_H */
Linux pfifo_fast is the default priority queue enabled on Linux systems.
bool DoEnqueue(Ptr< QueueDiscItem > item) override
This function actually enqueues a packet into the queue disc.
Ptr< const QueueDiscItem > DoPeek() override
Return a copy of the next packet the queue disc will extract.
static TypeId GetTypeId()
Get the type ID.
bool CheckConfig() override
Check whether the current configuration is correct.
Ptr< QueueDiscItem > DoDequeue() override
This function actually extracts a packet from the queue disc.
static constexpr const char * LIMIT_EXCEEDED_DROP
Packet dropped due to queue disc limit exceeded.
void InitializeParams() override
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:77
QueueDisc is an abstract base class providing the interface and implementing the operations common to...
Definition: queue-disc.h:184
a unique identifier for an interface.
Definition: type-id.h:59
Every class exported by the ns3 library is enclosed in the ns3 namespace.