blob: 752f3fd9bc5ee01147fc842d1fae949e56d66291 [file] [log] [blame]
Junxiao Shi9b0d3e92014-02-15 12:27:12 -07001/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2/**
Alexander Afanasyev9bcbc7c2014-04-06 19:37:37 -07003 * Copyright (c) 2014 Regents of the University of California,
4 * Arizona Board of Regents,
5 * Colorado State University,
6 * University Pierre & Marie Curie, Sorbonne University,
7 * Washington University in St. Louis,
8 * Beijing Institute of Technology
9 *
10 * This file is part of NFD (Named Data Networking Forwarding Daemon).
11 * See AUTHORS.md for complete list of NFD authors and contributors.
12 *
13 * NFD is free software: you can redistribute it and/or modify it under the terms
14 * of the GNU General Public License as published by the Free Software Foundation,
15 * either version 3 of the License, or (at your option) any later version.
16 *
17 * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
18 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
19 * PURPOSE. See the GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License along with
22 * NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
23 **/
Junxiao Shi9b0d3e92014-02-15 12:27:12 -070024
25#ifndef NFD_FACE_NDNLP_SEQUENCE_GENERATOR_HPP
26#define NFD_FACE_NDNLP_SEQUENCE_GENERATOR_HPP
27
28#include "common.hpp"
29
30namespace nfd {
31namespace ndnlp {
32
33/** \brief represents a block of sequence numbers
34 */
35class SequenceBlock
36{
37public:
38 SequenceBlock(uint64_t start, size_t count);
Junxiao Shidf3b4382014-02-23 11:28:21 -070039
Junxiao Shi9b0d3e92014-02-15 12:27:12 -070040 /** \return{ the pos-th sequence number }
41 */
42 uint64_t
43 operator[](size_t pos) const;
Junxiao Shidf3b4382014-02-23 11:28:21 -070044
Junxiao Shi9b0d3e92014-02-15 12:27:12 -070045 size_t
46 count() const;
Junxiao Shidf3b4382014-02-23 11:28:21 -070047
Junxiao Shi9b0d3e92014-02-15 12:27:12 -070048private:
49 uint64_t m_start;
50 size_t m_count;
51};
52
53inline uint64_t
54SequenceBlock::operator[](size_t pos) const
55{
56 if (pos >= m_count)
57 throw std::out_of_range("pos");
58 return m_start + static_cast<uint64_t>(pos);
59}
60
61inline size_t
62SequenceBlock::count() const
63{
64 return m_count;
65}
66
67/** \class SequenceGenerator
68 * \brief generates sequence numbers
69 */
70class SequenceGenerator : noncopyable
71{
72public:
73 SequenceGenerator();
Junxiao Shidf3b4382014-02-23 11:28:21 -070074
Junxiao Shi9b0d3e92014-02-15 12:27:12 -070075 /** \brief generates a block of consecutive sequence numbers
76 *
77 * This block must not overlap with a recent block.
78 */
79 SequenceBlock
80 nextBlock(size_t count);
81
82private:
83 /// next sequence number
84 uint64_t m_next;
85};
86
87} // namespace ndnlp
88} // namespace nfd
89
90#endif // NFD_FACE_NDNLP_SEQUENCE_GENERATOR_HPP