consumerd: send a buffer static sample on flush command
[lttng-tools.git] / src / common / time.hpp
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1/*
2 * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
3 *
4 * SPDX-License-Identifier: LGPL-2.1-or-later
5 *
6 */
7
8#ifndef LTTNG_TIME_H
9#define LTTNG_TIME_H
10
11#include <time.h>
12#include <ctime>
13#include <stdbool.h>
14#include <string>
15
16#include <common/macros.hpp>
17#include <common/compat/time.hpp>
18
19#define MSEC_PER_SEC 1000ULL
20#define NSEC_PER_SEC 1000000000ULL
21#define NSEC_PER_MSEC 1000000ULL
22#define NSEC_PER_USEC 1000ULL
23#define USEC_PER_SEC 1000000ULL
24#define USEC_PER_MSEC 1000ULL
25
26#define SEC_PER_MINUTE 60ULL
27#define MINUTE_PER_HOUR 60ULL
28
29#define USEC_PER_MINUTE (USEC_PER_SEC * SEC_PER_MINUTE)
30#define USEC_PER_HOURS (USEC_PER_MINUTE * MINUTE_PER_HOUR)
31
32#define ISO8601_STR_LEN sizeof("YYYYmmddTHHMMSS+HHMM")
33#define DATETIME_STR_LEN sizeof("YYYYmmdd-HHMMSS")
34
35bool locale_supports_utf8(void);
36
37#define NSEC_UNIT "ns"
38#define USEC_UNIT (locale_supports_utf8() ? "µs" : "us")
39#define MSEC_UNIT "ms"
40#define SEC_UNIT "s"
41#define MIN_UNIT "m"
42#define HR_UNIT "h"
43
44/*
45 * timespec_to_ms: Convert timespec to milliseconds.
46 *
47 * Returns 0 on success, else -1 on error. errno is set to EOVERFLOW if
48 * input would overflow the output in milliseconds.
49 */
50int timespec_to_ms(struct timespec ts, unsigned long *ms);
51
52/*
53 * timespec_abs_diff: Absolute difference between timespec.
54 */
55struct timespec timespec_abs_diff(struct timespec ts_a, struct timespec ts_b);
56
57/*
58 * Format a Unix timestamp to an ISO 8601 compatible timestamp of
59 * the form "YYYYmmddTHHMMSS+HHMM" in local time. `len` must >= to
60 * ISO8601_STR_LEN.
61 *
62 * Returns 0 on success, else -1 on error.
63 */
64int time_to_iso8601_str(time_t time, char *str, size_t len);
65namespace lttng {
66namespace utils {
67
68std::string time_to_iso8601_str(time_t time);
69
70} /* namespace utils */
71} /* namespace lttng */
72
73int time_to_datetime_str(time_t time, char *str, size_t len);
74
75#endif /* LTTNG_TIME_H */
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