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9a98c7a1 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | #pragma once | |
4 | ||
5 | /*** | |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2010 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
11 | under the terms of the GNU Lesser General Public License as published by | |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | Lesser General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU Lesser General Public License | |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
22 | ***/ | |
23 | ||
cb0dac05 | 24 | #include <inttypes.h> |
11c3a366 TA |
25 | #include <stdbool.h> |
26 | #include <stddef.h> | |
27 | #include <stdint.h> | |
7c67c79c HV |
28 | #include <stdio.h> |
29 | #include <time.h> | |
9a98c7a1 LP |
30 | |
31 | typedef uint64_t usec_t; | |
32 | typedef uint64_t nsec_t; | |
33 | ||
ccd06097 ZJS |
34 | #define NSEC_FMT "%" PRIu64 |
35 | #define USEC_FMT "%" PRIu64 | |
36 | ||
9a98c7a1 LP |
37 | #include "macro.h" |
38 | ||
39 | typedef struct dual_timestamp { | |
40 | usec_t realtime; | |
41 | usec_t monotonic; | |
42 | } dual_timestamp; | |
43 | ||
3a43da28 KS |
44 | #define USEC_INFINITY ((usec_t) -1) |
45 | #define NSEC_INFINITY ((nsec_t) -1) | |
46 | ||
47 | #define MSEC_PER_SEC 1000ULL | |
609e002e LP |
48 | #define USEC_PER_SEC ((usec_t) 1000000ULL) |
49 | #define USEC_PER_MSEC ((usec_t) 1000ULL) | |
3a43da28 KS |
50 | #define NSEC_PER_SEC ((nsec_t) 1000000000ULL) |
51 | #define NSEC_PER_MSEC ((nsec_t) 1000000ULL) | |
52 | #define NSEC_PER_USEC ((nsec_t) 1000ULL) | |
609e002e LP |
53 | |
54 | #define USEC_PER_MINUTE ((usec_t) (60ULL*USEC_PER_SEC)) | |
3a43da28 | 55 | #define NSEC_PER_MINUTE ((nsec_t) (60ULL*NSEC_PER_SEC)) |
609e002e | 56 | #define USEC_PER_HOUR ((usec_t) (60ULL*USEC_PER_MINUTE)) |
3a43da28 | 57 | #define NSEC_PER_HOUR ((nsec_t) (60ULL*NSEC_PER_MINUTE)) |
609e002e | 58 | #define USEC_PER_DAY ((usec_t) (24ULL*USEC_PER_HOUR)) |
3a43da28 | 59 | #define NSEC_PER_DAY ((nsec_t) (24ULL*NSEC_PER_HOUR)) |
609e002e | 60 | #define USEC_PER_WEEK ((usec_t) (7ULL*USEC_PER_DAY)) |
3a43da28 | 61 | #define NSEC_PER_WEEK ((nsec_t) (7ULL*NSEC_PER_DAY)) |
609e002e | 62 | #define USEC_PER_MONTH ((usec_t) (2629800ULL*USEC_PER_SEC)) |
3a43da28 | 63 | #define NSEC_PER_MONTH ((nsec_t) (2629800ULL*NSEC_PER_SEC)) |
609e002e | 64 | #define USEC_PER_YEAR ((usec_t) (31557600ULL*USEC_PER_SEC)) |
3a43da28 | 65 | #define NSEC_PER_YEAR ((nsec_t) (31557600ULL*NSEC_PER_SEC)) |
9a98c7a1 | 66 | |
f0d7b0fc | 67 | #define FORMAT_TIMESTAMP_MAX ((4*4+1)+11+9+4+1) /* weekdays can be unicode */ |
c3f84106 | 68 | #define FORMAT_TIMESTAMP_WIDTH 28 /* when outputting, assume this width */ |
9185c8e6 | 69 | #define FORMAT_TIMESTAMP_RELATIVE_MAX 256 |
9a98c7a1 LP |
70 | #define FORMAT_TIMESPAN_MAX 64 |
71 | ||
2d60169d | 72 | #define TIME_T_MAX (time_t)((UINTMAX_C(1) << ((sizeof(time_t) << 3) - 1)) - 1) |
e4746b57 | 73 | |
86caf095 | 74 | #define DUAL_TIMESTAMP_NULL ((struct dual_timestamp) { 0ULL, 0ULL }) |
842129f5 | 75 | |
9a98c7a1 | 76 | usec_t now(clockid_t clock); |
45d7a8bb | 77 | nsec_t now_nsec(clockid_t clock); |
9a98c7a1 LP |
78 | |
79 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts); | |
80 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u); | |
cae0c5e0 | 81 | dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u); |
fbe55073 | 82 | dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u); |
9a98c7a1 | 83 | |
966204e0 | 84 | static inline bool dual_timestamp_is_set(dual_timestamp *ts) { |
3a43da28 KS |
85 | return ((ts->realtime > 0 && ts->realtime != USEC_INFINITY) || |
86 | (ts->monotonic > 0 && ts->monotonic != USEC_INFINITY)); | |
966204e0 | 87 | } |
9a98c7a1 | 88 | |
44a6b1b6 | 89 | usec_t timespec_load(const struct timespec *ts) _pure_; |
9a98c7a1 LP |
90 | struct timespec *timespec_store(struct timespec *ts, usec_t u); |
91 | ||
44a6b1b6 | 92 | usec_t timeval_load(const struct timeval *tv) _pure_; |
9a98c7a1 LP |
93 | struct timeval *timeval_store(struct timeval *tv, usec_t u); |
94 | ||
45d7a8bb LP |
95 | nsec_t timespec_load_nsec(const struct timespec *ts) _pure_; |
96 | ||
9a98c7a1 | 97 | char *format_timestamp(char *buf, size_t l, usec_t t); |
5ab99e07 LP |
98 | char *format_timestamp_utc(char *buf, size_t l, usec_t t); |
99 | char *format_timestamp_us(char *buf, size_t l, usec_t t); | |
100 | char *format_timestamp_us_utc(char *buf, size_t l, usec_t t); | |
bbb8486e | 101 | char *format_timestamp_relative(char *buf, size_t l, usec_t t); |
2fa4092c | 102 | char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy); |
9a98c7a1 LP |
103 | |
104 | void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t); | |
e911de99 | 105 | int dual_timestamp_deserialize(const char *value, dual_timestamp *t); |
9a98c7a1 LP |
106 | |
107 | int parse_timestamp(const char *t, usec_t *usec); | |
108 | ||
7f602784 | 109 | int parse_sec(const char *t, usec_t *usec); |
519cffec | 110 | int parse_time(const char *t, usec_t *usec, usec_t default_unit); |
9a98c7a1 | 111 | int parse_nsec(const char *t, nsec_t *nsec); |
03cc26dd LP |
112 | |
113 | bool ntp_synced(void); | |
75683450 LP |
114 | |
115 | int get_timezones(char ***l); | |
116 | bool timezone_is_valid(const char *name); | |
77ff2de9 TG |
117 | |
118 | clockid_t clock_boottime_or_monotonic(void); | |
babc21fd | 119 | |
a8b62610 MS |
120 | #define xstrftime(buf, fmt, tm) \ |
121 | assert_message_se(strftime(buf, ELEMENTSOF(buf), fmt, tm) > 0, \ | |
122 | "xstrftime: " #buf "[] must be big enough") | |
5c904ba5 LP |
123 | |
124 | int get_timezone(char **timezone); | |
7c67c79c HV |
125 | |
126 | time_t mktime_or_timegm(struct tm *tm, bool utc); | |
127 | struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc); | |
87b8ce69 SS |
128 | |
129 | unsigned long usec_to_jiffies(usec_t usec); | |
53f555b6 LP |
130 | |
131 | static inline usec_t usec_add(usec_t a, usec_t b) { | |
132 | usec_t c; | |
133 | ||
134 | /* Adds two time values, and makes sure USEC_INFINITY as input results as USEC_INFINITY in output, and doesn't | |
135 | * overflow. */ | |
136 | ||
137 | c = a + b; | |
138 | if (c < a || c < b) /* overflow check */ | |
139 | return USEC_INFINITY; | |
140 | ||
141 | return c; | |
142 | } | |
5d634ca8 AK |
143 | |
144 | static inline usec_t usec_sub(usec_t timestamp, int64_t delta) { | |
145 | if (delta < 0) | |
146 | timestamp = usec_add(timestamp, (usec_t) (-delta)); | |
147 | else if (timestamp > (usec_t) delta) | |
148 | timestamp -= delta; | |
149 | else | |
150 | timestamp = 0; | |
151 | ||
152 | return timestamp; | |
153 | } |