Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 1 | /* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */ |
| 2 | /* |
| 3 | * Copyright (c) 2012 University of California, Los Angeles |
| 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 | * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu> |
| 19 | */ |
| 20 | |
| 21 | #include "ndn-pit-queue.h" |
| 22 | |
| 23 | #include "ns3/ndn-face.h" |
| 24 | #include "ns3/ndn-pit-entry.h" |
| 25 | |
| 26 | #include "ns3/assert.h" |
| 27 | |
| 28 | using namespace std; |
| 29 | |
| 30 | namespace ns3 { |
| 31 | namespace ndn { |
| 32 | |
Alexander Afanasyev | ec1e395 | 2012-08-20 13:48:15 -0700 | [diff] [blame^] | 33 | PitQueue::PitQueue () |
| 34 | : m_maxQueueSize (10) |
| 35 | , m_lastQueue (m_queues.begin ()) |
Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 36 | { |
| 37 | } |
Alexander Afanasyev | ec1e395 | 2012-08-20 13:48:15 -0700 | [diff] [blame^] | 38 | |
| 39 | void |
| 40 | PitQueue::SetMaxQueueSize (uint32_t size) |
Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 41 | { |
Alexander Afanasyev | ec1e395 | 2012-08-20 13:48:15 -0700 | [diff] [blame^] | 42 | m_maxQueueSize = size; |
| 43 | } |
| 44 | |
| 45 | uint32_t |
| 46 | PitQueue::GetMaxQueueSize () const |
| 47 | { |
| 48 | return m_maxQueueSize; |
Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 49 | } |
| 50 | |
| 51 | |
| 52 | bool |
| 53 | PitQueue::Enqueue (Ptr<Face> inFace, |
| 54 | Ptr<pit::Entry> pitEntry) |
| 55 | { |
Alexander Afanasyev | ec1e395 | 2012-08-20 13:48:15 -0700 | [diff] [blame^] | 56 | Queue &queue = m_queues [inFace]; // either lookup or create |
| 57 | if (queue.size () >= m_maxQueueSize) |
| 58 | return false; |
| 59 | |
| 60 | queue.push_back (pitEntry); |
| 61 | return true; |
Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | Ptr<pit::Entry> |
| 65 | PitQueue::Pop () |
| 66 | { |
Alexander Afanasyev | ec1e395 | 2012-08-20 13:48:15 -0700 | [diff] [blame^] | 67 | PerInFaceQueue::iterator queue = m_lastQueue; |
| 68 | |
| 69 | while (queue != m_queues.end () && queue->second.size () == 0) // advance iterator |
| 70 | { |
| 71 | queue ++; |
| 72 | } |
| 73 | |
| 74 | if (queue == m_queues.end ()) |
| 75 | queue = m_queues.begin (); // circle to the beginning |
| 76 | |
| 77 | while (queue != m_queues.end () && queue->second.size () == 0) // advance iterator |
| 78 | { |
| 79 | queue ++; |
| 80 | } |
| 81 | |
| 82 | if (queue == m_queues.end ()) // e.g., begin () == end () |
Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 83 | return 0; |
| 84 | |
Alexander Afanasyev | ec1e395 | 2012-08-20 13:48:15 -0700 | [diff] [blame^] | 85 | NS_ASSERT_MSG (queue->second.size () != 0, "Logic error"); |
Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 86 | |
Alexander Afanasyev | ec1e395 | 2012-08-20 13:48:15 -0700 | [diff] [blame^] | 87 | Ptr<pit::Entry> entry = *queue->second.begin (); |
| 88 | queue->second.pop_front (); |
Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 89 | |
Alexander Afanasyev | ec1e395 | 2012-08-20 13:48:15 -0700 | [diff] [blame^] | 90 | m_lastQueue = queue; |
| 91 | return entry; |
Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | void |
| 95 | PitQueue::Remove (Ptr<Face> face) |
| 96 | { |
Alexander Afanasyev | ec1e395 | 2012-08-20 13:48:15 -0700 | [diff] [blame^] | 97 | if (m_lastQueue->first == face) |
Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 98 | { |
Alexander Afanasyev | ec1e395 | 2012-08-20 13:48:15 -0700 | [diff] [blame^] | 99 | m_lastQueue++; |
Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 100 | } |
Alexander Afanasyev | ec1e395 | 2012-08-20 13:48:15 -0700 | [diff] [blame^] | 101 | |
| 102 | m_queues.erase (face); |
Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | void |
| 106 | PitQueue::Remove (Ptr<pit::Entry> entry) |
| 107 | { |
Alexander Afanasyev | 048ae42 | 2012-08-17 17:33:02 -0700 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | |
| 111 | } // namespace ndn |
| 112 | } // namespace ns3 |