VirtualBox

source: vbox/trunk/src/VBox/NetworkServices/Dhcpd/Timestamp.h

Last change on this file was 106061, checked in by vboxsync, 3 months ago

Copyright year updates by scm.

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1/* $Id: Timestamp.h 106061 2024-09-16 14:03:52Z vboxsync $ */
2/** @file
3 * DHCP server - timestamps
4 */
5
6/*
7 * Copyright (C) 2017-2024 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * SPDX-License-Identifier: GPL-3.0-only
26 */
27
28#ifndef VBOX_INCLUDED_SRC_Dhcpd_Timestamp_h
29#define VBOX_INCLUDED_SRC_Dhcpd_Timestamp_h
30#ifndef RT_WITHOUT_PRAGMA_ONCE
31# pragma once
32#endif
33
34#include <iprt/time.h>
35
36
37/**
38 * Wrapper around RTTIMESPEC.
39 *
40 * @note Originally wanting to use RTTimeNanoTS rather than RTTimeNow. The term
41 * "absolute" was used for when the RTTimeNanoTS() value was converted to
42 * something approximating unix epoch relative time with help of
43 * RTTimeNow(). Code was later changed to just wrap RTTIMESPEC and drop
44 * all usage of RTTimeNanoTS, ASSUMING that system time is stable.
45 */
46class Timestamp
47{
48 RTTIMESPEC m_TimeSpec;
49
50public:
51 Timestamp() RT_NOEXCEPT
52 {
53 RTTimeSpecSetNano(&m_TimeSpec, 0);
54 }
55
56 Timestamp(PCRTTIMESPEC a_pTimeSpec) RT_NOEXCEPT
57 {
58 m_TimeSpec = *a_pTimeSpec;
59 }
60
61 /** Get a timestamp initialized to current time. */
62 static Timestamp now() RT_NOEXCEPT
63 {
64 RTTIMESPEC Tmp;
65 return Timestamp(RTTimeNow(&Tmp));
66 }
67
68 /** Get a timestamp with the given value in seconds since unix epoch. */
69 static Timestamp absSeconds(int64_t secTimestamp) RT_NOEXCEPT
70 {
71 RTTIMESPEC Tmp;
72 return Timestamp(RTTimeSpecSetSeconds(&Tmp, secTimestamp));
73 }
74
75 Timestamp &addSeconds(int64_t cSecs) RT_NOEXCEPT
76 {
77 RTTimeSpecAddSeconds(&m_TimeSpec, cSecs);
78 return *this;
79 }
80
81 Timestamp &subSeconds(int64_t cSecs) RT_NOEXCEPT
82 {
83 RTTimeSpecSubSeconds(&m_TimeSpec, cSecs);
84 return *this;
85 }
86
87 RTTIMESPEC *getAbsTimeSpec(RTTIMESPEC *pTime) const RT_NOEXCEPT
88 {
89 *pTime = m_TimeSpec;
90 return pTime;
91 }
92
93 int64_t getAbsSeconds() const RT_NOEXCEPT
94 {
95 return RTTimeSpecGetSeconds(&m_TimeSpec);
96 }
97
98 /** Only for log formatting. */
99 size_t strFormatHelper(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput) const RT_NOEXCEPT;
100
101 int compare(const Timestamp &a_rRight) const RT_NOEXCEPT
102 {
103 return RTTimeSpecCompare(&m_TimeSpec, &a_rRight.m_TimeSpec);
104 }
105
106 friend bool operator<( const Timestamp &, const Timestamp &) RT_NOEXCEPT;
107 friend bool operator>( const Timestamp &, const Timestamp &) RT_NOEXCEPT;
108 friend bool operator==(const Timestamp &, const Timestamp &) RT_NOEXCEPT;
109 friend bool operator!=(const Timestamp &, const Timestamp &) RT_NOEXCEPT;
110 friend bool operator<=(const Timestamp &, const Timestamp &) RT_NOEXCEPT;
111 friend bool operator>=(const Timestamp &, const Timestamp &) RT_NOEXCEPT;
112};
113
114
115inline bool operator<( const Timestamp &l, const Timestamp &r) RT_NOEXCEPT { return l.compare(r) < 0; }
116inline bool operator>( const Timestamp &l, const Timestamp &r) RT_NOEXCEPT { return l.compare(r) > 0; }
117inline bool operator==(const Timestamp &l, const Timestamp &r) RT_NOEXCEPT { return l.compare(r) == 0; }
118inline bool operator!=(const Timestamp &l, const Timestamp &r) RT_NOEXCEPT { return l.compare(r) != 0; }
119inline bool operator<=(const Timestamp &l, const Timestamp &r) RT_NOEXCEPT { return l.compare(r) <= 0; }
120inline bool operator>=(const Timestamp &l, const Timestamp &r) RT_NOEXCEPT { return l.compare(r) >= 0; }
121
122#endif /* !VBOX_INCLUDED_SRC_Dhcpd_Timestamp_h */
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