| 1 | /* |
| 2 | * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2.1 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * This library 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 GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with this library; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | #ifndef LTTNG_TIME_H |
| 20 | #define LTTNG_TIME_H |
| 21 | |
| 22 | #include <time.h> |
| 23 | #include <stdbool.h> |
| 24 | |
| 25 | #define MSEC_PER_SEC 1000ULL |
| 26 | #define NSEC_PER_SEC 1000000000ULL |
| 27 | #define NSEC_PER_MSEC 1000000ULL |
| 28 | #define NSEC_PER_USEC 1000ULL |
| 29 | |
| 30 | bool locale_supports_utf8(void); |
| 31 | |
| 32 | #define NSEC_UNIT "ns" |
| 33 | #define USEC_UNIT (locale_supports_utf8() ? "µs" : "us") |
| 34 | #define MSEC_UNIT "ms" |
| 35 | #define SEC_UNIT "s" |
| 36 | #define MIN_UNIT "m" |
| 37 | #define HR_UNIT "h" |
| 38 | |
| 39 | /* |
| 40 | * timespec_to_ms: Convert timespec to milliseconds. |
| 41 | * |
| 42 | * Returns 0 on success, else -1 on error. errno is set to EOVERFLOW if |
| 43 | * input would overflow the output in milliseconds. |
| 44 | */ |
| 45 | int timespec_to_ms(struct timespec ts, unsigned long *ms); |
| 46 | |
| 47 | /* |
| 48 | * timespec_abs_diff: Absolute difference between timespec. |
| 49 | */ |
| 50 | struct timespec timespec_abs_diff(struct timespec ts_a, struct timespec ts_b); |
| 51 | |
| 52 | #endif /* LTTNG_TIME_H */ |