A Discrete-Event Network Simulator
API
system-wall-clock-timestamp.cc
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1 /*
2  * Copyright (c) 2020 Lawrence Livermore National Laboratory
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation;
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program; if not, write to the Free Software
15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16  *
17  * Author: Peter D. Barnes, Jr. <pdbarnes@llnl.gov>
18  */
19 
20 #include "system-wall-clock-timestamp.h"
21 
28 namespace ns3
29 {
30 
31 SystemWallClockTimestamp::SystemWallClockTimestamp()
32  : m_last(0),
33  m_diff(0)
34 {
35  Stamp();
36 }
37 
38 void
39 SystemWallClockTimestamp::Stamp()
40 {
41  std::time_t seconds = std::time(nullptr);
42  m_diff = seconds - m_last;
43  m_last = seconds;
44 }
45 
46 std::string
47 SystemWallClockTimestamp::ToString() const
48 {
49  std::string now = std::ctime(&m_last);
50  now.resize(now.length() - 1); // trim trailing newline
51  return now;
52 }
53 
54 std::time_t
55 SystemWallClockTimestamp::GetLast() const
56 {
57  return m_last;
58 }
59 
60 std::time_t
61 SystemWallClockTimestamp::GetInterval() const
62 {
63  return m_diff;
64 }
65 
66 } // namespace ns3
ns3::SystemWallClockTimestamp::GetInterval
std::time_t GetInterval() const
Get the last recorded interval.
Definition: system-wall-clock-timestamp.cc:61
ns3::SystemWallClockTimestamp::GetLast
std::time_t GetLast() const
Get the last recorded raw value.
Definition: system-wall-clock-timestamp.cc:55
ns3::SystemWallClockTimestamp::ToString
std::string ToString() const
Get the last time stamp as a string.
Definition: system-wall-clock-timestamp.cc:47
ns3::SystemWallClockTimestamp::m_diff
std::time_t m_diff
Difference between the two previous time stamps.
Definition: system-wall-clock-timestamp.h:70
ns3::SystemWallClockTimestamp::Stamp
void Stamp()
Record the current wall-clock time and delta since the last stamp().
Definition: system-wall-clock-timestamp.cc:39
ns3::SystemWallClockTimestamp::m_last
std::time_t m_last
The last time stamp.
Definition: system-wall-clock-timestamp.h:67
ns3
Every class exported by the ns3 library is enclosed in the ns3 namespace.
system-wall-clock-timestamp.h
ns3::SystemWallClockTimestamp declaration.