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9a98c7a1 LP |
1 | #pragma once |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
cb0dac05 | 22 | #include <inttypes.h> |
11c3a366 TA |
23 | #include <stdbool.h> |
24 | #include <stddef.h> | |
25 | #include <stdint.h> | |
7c67c79c HV |
26 | #include <stdio.h> |
27 | #include <time.h> | |
9a98c7a1 LP |
28 | |
29 | typedef uint64_t usec_t; | |
30 | typedef uint64_t nsec_t; | |
31 | ||
70887c5f ZJS |
32 | #define PRI_NSEC PRIu64 |
33 | #define PRI_USEC PRIu64 | |
34 | #define NSEC_FMT "%" PRI_NSEC | |
35 | #define USEC_FMT "%" PRI_USEC | |
ccd06097 | 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 | ||
fe624c4c LP |
44 | typedef struct triple_timestamp { |
45 | usec_t realtime; | |
46 | usec_t monotonic; | |
47 | usec_t boottime; | |
48 | } triple_timestamp; | |
49 | ||
3a43da28 KS |
50 | #define USEC_INFINITY ((usec_t) -1) |
51 | #define NSEC_INFINITY ((nsec_t) -1) | |
52 | ||
53 | #define MSEC_PER_SEC 1000ULL | |
609e002e LP |
54 | #define USEC_PER_SEC ((usec_t) 1000000ULL) |
55 | #define USEC_PER_MSEC ((usec_t) 1000ULL) | |
3a43da28 KS |
56 | #define NSEC_PER_SEC ((nsec_t) 1000000000ULL) |
57 | #define NSEC_PER_MSEC ((nsec_t) 1000000ULL) | |
58 | #define NSEC_PER_USEC ((nsec_t) 1000ULL) | |
609e002e LP |
59 | |
60 | #define USEC_PER_MINUTE ((usec_t) (60ULL*USEC_PER_SEC)) | |
3a43da28 | 61 | #define NSEC_PER_MINUTE ((nsec_t) (60ULL*NSEC_PER_SEC)) |
609e002e | 62 | #define USEC_PER_HOUR ((usec_t) (60ULL*USEC_PER_MINUTE)) |
3a43da28 | 63 | #define NSEC_PER_HOUR ((nsec_t) (60ULL*NSEC_PER_MINUTE)) |
609e002e | 64 | #define USEC_PER_DAY ((usec_t) (24ULL*USEC_PER_HOUR)) |
3a43da28 | 65 | #define NSEC_PER_DAY ((nsec_t) (24ULL*NSEC_PER_HOUR)) |
609e002e | 66 | #define USEC_PER_WEEK ((usec_t) (7ULL*USEC_PER_DAY)) |
3a43da28 | 67 | #define NSEC_PER_WEEK ((nsec_t) (7ULL*NSEC_PER_DAY)) |
609e002e | 68 | #define USEC_PER_MONTH ((usec_t) (2629800ULL*USEC_PER_SEC)) |
3a43da28 | 69 | #define NSEC_PER_MONTH ((nsec_t) (2629800ULL*NSEC_PER_SEC)) |
609e002e | 70 | #define USEC_PER_YEAR ((usec_t) (31557600ULL*USEC_PER_SEC)) |
3a43da28 | 71 | #define NSEC_PER_YEAR ((nsec_t) (31557600ULL*NSEC_PER_SEC)) |
9a98c7a1 | 72 | |
21b3a0fc LP |
73 | /* We assume a maximum timezone length of 6. TZNAME_MAX is not defined on Linux, but glibc internally initializes this |
74 | * to 6. Let's rely on that. */ | |
75 | #define FORMAT_TIMESTAMP_MAX (3+1+10+1+8+1+6+1+6+1) | |
c3f84106 | 76 | #define FORMAT_TIMESTAMP_WIDTH 28 /* when outputting, assume this width */ |
9185c8e6 | 77 | #define FORMAT_TIMESTAMP_RELATIVE_MAX 256 |
9a98c7a1 LP |
78 | #define FORMAT_TIMESPAN_MAX 64 |
79 | ||
2d60169d | 80 | #define TIME_T_MAX (time_t)((UINTMAX_C(1) << ((sizeof(time_t) << 3) - 1)) - 1) |
e4746b57 | 81 | |
fe624c4c LP |
82 | #define DUAL_TIMESTAMP_NULL ((struct dual_timestamp) {}) |
83 | #define TRIPLE_TIMESTAMP_NULL ((struct triple_timestamp) {}) | |
842129f5 | 84 | |
9a98c7a1 | 85 | usec_t now(clockid_t clock); |
45d7a8bb | 86 | nsec_t now_nsec(clockid_t clock); |
9a98c7a1 LP |
87 | |
88 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts); | |
89 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u); | |
cae0c5e0 | 90 | dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u); |
fbe55073 | 91 | dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u); |
9a98c7a1 | 92 | |
fe624c4c LP |
93 | triple_timestamp* triple_timestamp_get(triple_timestamp *ts); |
94 | triple_timestamp* triple_timestamp_from_realtime(triple_timestamp *ts, usec_t u); | |
95 | ||
96 | #define DUAL_TIMESTAMP_HAS_CLOCK(clock) \ | |
97 | IN_SET(clock, CLOCK_REALTIME, CLOCK_REALTIME_ALARM, CLOCK_MONOTONIC) | |
98 | ||
99 | #define TRIPLE_TIMESTAMP_HAS_CLOCK(clock) \ | |
100 | IN_SET(clock, CLOCK_REALTIME, CLOCK_REALTIME_ALARM, CLOCK_MONOTONIC, CLOCK_BOOTTIME, CLOCK_BOOTTIME_ALARM) | |
101 | ||
966204e0 | 102 | static inline bool dual_timestamp_is_set(dual_timestamp *ts) { |
3a43da28 KS |
103 | return ((ts->realtime > 0 && ts->realtime != USEC_INFINITY) || |
104 | (ts->monotonic > 0 && ts->monotonic != USEC_INFINITY)); | |
966204e0 | 105 | } |
9a98c7a1 | 106 | |
fe624c4c LP |
107 | static inline bool triple_timestamp_is_set(triple_timestamp *ts) { |
108 | return ((ts->realtime > 0 && ts->realtime != USEC_INFINITY) || | |
109 | (ts->monotonic > 0 && ts->monotonic != USEC_INFINITY) || | |
110 | (ts->boottime > 0 && ts->boottime != USEC_INFINITY)); | |
111 | } | |
112 | ||
113 | usec_t triple_timestamp_by_clock(triple_timestamp *ts, clockid_t clock); | |
114 | ||
44a6b1b6 | 115 | usec_t timespec_load(const struct timespec *ts) _pure_; |
3a730176 | 116 | nsec_t timespec_load_nsec(const struct timespec *ts) _pure_; |
9a98c7a1 LP |
117 | struct timespec *timespec_store(struct timespec *ts, usec_t u); |
118 | ||
44a6b1b6 | 119 | usec_t timeval_load(const struct timeval *tv) _pure_; |
9a98c7a1 LP |
120 | struct timeval *timeval_store(struct timeval *tv, usec_t u); |
121 | ||
122 | char *format_timestamp(char *buf, size_t l, usec_t t); | |
5ab99e07 LP |
123 | char *format_timestamp_utc(char *buf, size_t l, usec_t t); |
124 | char *format_timestamp_us(char *buf, size_t l, usec_t t); | |
125 | char *format_timestamp_us_utc(char *buf, size_t l, usec_t t); | |
bbb8486e | 126 | char *format_timestamp_relative(char *buf, size_t l, usec_t t); |
2fa4092c | 127 | char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy); |
9a98c7a1 LP |
128 | |
129 | void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t); | |
e911de99 | 130 | int dual_timestamp_deserialize(const char *value, dual_timestamp *t); |
b895a735 | 131 | int timestamp_deserialize(const char *value, usec_t *timestamp); |
9a98c7a1 LP |
132 | |
133 | int parse_timestamp(const char *t, usec_t *usec); | |
134 | ||
7f602784 | 135 | int parse_sec(const char *t, usec_t *usec); |
519cffec | 136 | int parse_time(const char *t, usec_t *usec, usec_t default_unit); |
9a98c7a1 | 137 | int parse_nsec(const char *t, nsec_t *nsec); |
03cc26dd LP |
138 | |
139 | bool ntp_synced(void); | |
75683450 LP |
140 | |
141 | int get_timezones(char ***l); | |
142 | bool timezone_is_valid(const char *name); | |
77ff2de9 | 143 | |
3411372e | 144 | bool clock_boottime_supported(void); |
fe624c4c | 145 | bool clock_supported(clockid_t clock); |
77ff2de9 | 146 | clockid_t clock_boottime_or_monotonic(void); |
babc21fd | 147 | |
a8b62610 MS |
148 | #define xstrftime(buf, fmt, tm) \ |
149 | assert_message_se(strftime(buf, ELEMENTSOF(buf), fmt, tm) > 0, \ | |
150 | "xstrftime: " #buf "[] must be big enough") | |
5c904ba5 LP |
151 | |
152 | int get_timezone(char **timezone); | |
7c67c79c HV |
153 | |
154 | time_t mktime_or_timegm(struct tm *tm, bool utc); | |
155 | struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc); | |
87b8ce69 SS |
156 | |
157 | unsigned long usec_to_jiffies(usec_t usec); | |
53f555b6 LP |
158 | |
159 | static inline usec_t usec_add(usec_t a, usec_t b) { | |
160 | usec_t c; | |
161 | ||
162 | /* Adds two time values, and makes sure USEC_INFINITY as input results as USEC_INFINITY in output, and doesn't | |
163 | * overflow. */ | |
164 | ||
165 | c = a + b; | |
166 | if (c < a || c < b) /* overflow check */ | |
167 | return USEC_INFINITY; | |
168 | ||
169 | return c; | |
170 | } | |
5d634ca8 AK |
171 | |
172 | static inline usec_t usec_sub(usec_t timestamp, int64_t delta) { | |
173 | if (delta < 0) | |
04a1d84c | 174 | return usec_add(timestamp, (usec_t) (-delta)); |
5d634ca8 | 175 | |
04a1d84c LP |
176 | if (timestamp == USEC_INFINITY) /* Make sure infinity doesn't degrade */ |
177 | return USEC_INFINITY; | |
178 | ||
179 | if (timestamp < (usec_t) delta) | |
180 | return 0; | |
181 | ||
182 | return timestamp - delta; | |
5d634ca8 | 183 | } |
1bb4b028 LP |
184 | |
185 | #if SIZEOF_TIME_T == 8 | |
186 | /* The last second we can format is 31. Dec 9999, 1s before midnight, because otherwise we'd enter 5 digit year | |
187 | * territory. However, since we want to stay away from this in all timezones we take one day off. */ | |
188 | #define USEC_TIMESTAMP_FORMATTABLE_MAX ((usec_t) 253402214399000000) | |
189 | #elif SIZEOF_TIME_T == 4 | |
190 | /* With a 32bit time_t we can't go beyond 2038... */ | |
191 | #define USEC_TIMESTAMP_FORMATTABLE_MAX ((usec_t) 2147483647000000) | |
192 | #else | |
193 | #error "Yuck, time_t is neither 4 not 8 bytes wide?" | |
194 | #endif |