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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
9a98c7a1 LP |
2 | #pragma once |
3 | ||
cb0dac05 | 4 | #include <inttypes.h> |
11c3a366 TA |
5 | #include <stdbool.h> |
6 | #include <stddef.h> | |
7 | #include <stdint.h> | |
7c67c79c HV |
8 | #include <stdio.h> |
9 | #include <time.h> | |
9a98c7a1 LP |
10 | |
11 | typedef uint64_t usec_t; | |
12 | typedef uint64_t nsec_t; | |
13 | ||
70887c5f ZJS |
14 | #define PRI_NSEC PRIu64 |
15 | #define PRI_USEC PRIu64 | |
16 | #define NSEC_FMT "%" PRI_NSEC | |
17 | #define USEC_FMT "%" PRI_USEC | |
ccd06097 | 18 | |
9a98c7a1 LP |
19 | #include "macro.h" |
20 | ||
21 | typedef struct dual_timestamp { | |
22 | usec_t realtime; | |
23 | usec_t monotonic; | |
24 | } dual_timestamp; | |
25 | ||
fe624c4c LP |
26 | typedef struct triple_timestamp { |
27 | usec_t realtime; | |
28 | usec_t monotonic; | |
29 | usec_t boottime; | |
30 | } triple_timestamp; | |
31 | ||
7b3eb5c9 LB |
32 | typedef enum TimestampStyle { |
33 | TIMESTAMP_PRETTY, | |
34 | TIMESTAMP_US, | |
35 | TIMESTAMP_UTC, | |
36 | TIMESTAMP_US_UTC, | |
37 | _TIMESTAMP_STYLE_MAX, | |
38 | _TIMESTAMP_STYLE_INVALID = -1, | |
39 | } TimestampStyle; | |
40 | ||
7c0eb30e LP |
41 | #define USEC_INFINITY ((usec_t) UINT64_MAX) |
42 | #define NSEC_INFINITY ((nsec_t) UINT64_MAX) | |
3a43da28 KS |
43 | |
44 | #define MSEC_PER_SEC 1000ULL | |
609e002e LP |
45 | #define USEC_PER_SEC ((usec_t) 1000000ULL) |
46 | #define USEC_PER_MSEC ((usec_t) 1000ULL) | |
3a43da28 KS |
47 | #define NSEC_PER_SEC ((nsec_t) 1000000000ULL) |
48 | #define NSEC_PER_MSEC ((nsec_t) 1000000ULL) | |
49 | #define NSEC_PER_USEC ((nsec_t) 1000ULL) | |
609e002e LP |
50 | |
51 | #define USEC_PER_MINUTE ((usec_t) (60ULL*USEC_PER_SEC)) | |
3a43da28 | 52 | #define NSEC_PER_MINUTE ((nsec_t) (60ULL*NSEC_PER_SEC)) |
609e002e | 53 | #define USEC_PER_HOUR ((usec_t) (60ULL*USEC_PER_MINUTE)) |
3a43da28 | 54 | #define NSEC_PER_HOUR ((nsec_t) (60ULL*NSEC_PER_MINUTE)) |
609e002e | 55 | #define USEC_PER_DAY ((usec_t) (24ULL*USEC_PER_HOUR)) |
3a43da28 | 56 | #define NSEC_PER_DAY ((nsec_t) (24ULL*NSEC_PER_HOUR)) |
609e002e | 57 | #define USEC_PER_WEEK ((usec_t) (7ULL*USEC_PER_DAY)) |
3a43da28 | 58 | #define NSEC_PER_WEEK ((nsec_t) (7ULL*NSEC_PER_DAY)) |
609e002e | 59 | #define USEC_PER_MONTH ((usec_t) (2629800ULL*USEC_PER_SEC)) |
3a43da28 | 60 | #define NSEC_PER_MONTH ((nsec_t) (2629800ULL*NSEC_PER_SEC)) |
609e002e | 61 | #define USEC_PER_YEAR ((usec_t) (31557600ULL*USEC_PER_SEC)) |
3a43da28 | 62 | #define NSEC_PER_YEAR ((nsec_t) (31557600ULL*NSEC_PER_SEC)) |
9a98c7a1 | 63 | |
21b3a0fc LP |
64 | /* We assume a maximum timezone length of 6. TZNAME_MAX is not defined on Linux, but glibc internally initializes this |
65 | * to 6. Let's rely on that. */ | |
67bd5620 LP |
66 | #define FORMAT_TIMESTAMP_MAX (3U+1U+10U+1U+8U+1U+6U+1U+6U+1U) |
67 | #define FORMAT_TIMESTAMP_WIDTH 28U /* when outputting, assume this width */ | |
68 | #define FORMAT_TIMESTAMP_RELATIVE_MAX 256U | |
69 | #define FORMAT_TIMESPAN_MAX 64U | |
9a98c7a1 | 70 | |
2d60169d | 71 | #define TIME_T_MAX (time_t)((UINTMAX_C(1) << ((sizeof(time_t) << 3) - 1)) - 1) |
e4746b57 | 72 | |
fe624c4c LP |
73 | #define DUAL_TIMESTAMP_NULL ((struct dual_timestamp) {}) |
74 | #define TRIPLE_TIMESTAMP_NULL ((struct triple_timestamp) {}) | |
842129f5 | 75 | |
9a98c7a1 | 76 | usec_t now(clockid_t clock); |
45d7a8bb | 77 | nsec_t now_nsec(clockid_t clock); |
9a98c7a1 | 78 | |
7c0eb30e LP |
79 | usec_t map_clock_usec(usec_t from, clockid_t from_clock, clockid_t to_clock); |
80 | ||
9a98c7a1 LP |
81 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts); |
82 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u); | |
cae0c5e0 | 83 | dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u); |
fbe55073 | 84 | dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u); |
9a98c7a1 | 85 | |
fe624c4c LP |
86 | triple_timestamp* triple_timestamp_get(triple_timestamp *ts); |
87 | triple_timestamp* triple_timestamp_from_realtime(triple_timestamp *ts, usec_t u); | |
88 | ||
89 | #define DUAL_TIMESTAMP_HAS_CLOCK(clock) \ | |
90 | IN_SET(clock, CLOCK_REALTIME, CLOCK_REALTIME_ALARM, CLOCK_MONOTONIC) | |
91 | ||
92 | #define TRIPLE_TIMESTAMP_HAS_CLOCK(clock) \ | |
93 | IN_SET(clock, CLOCK_REALTIME, CLOCK_REALTIME_ALARM, CLOCK_MONOTONIC, CLOCK_BOOTTIME, CLOCK_BOOTTIME_ALARM) | |
94 | ||
1f65fd49 ZJS |
95 | static inline bool timestamp_is_set(usec_t timestamp) { |
96 | return timestamp > 0 && timestamp != USEC_INFINITY; | |
97 | } | |
98 | ||
34cf6c43 | 99 | static inline bool dual_timestamp_is_set(const dual_timestamp *ts) { |
1f65fd49 ZJS |
100 | return timestamp_is_set(ts->realtime) || |
101 | timestamp_is_set(ts->monotonic); | |
966204e0 | 102 | } |
9a98c7a1 | 103 | |
34cf6c43 | 104 | static inline bool triple_timestamp_is_set(const triple_timestamp *ts) { |
1f65fd49 ZJS |
105 | return timestamp_is_set(ts->realtime) || |
106 | timestamp_is_set(ts->monotonic) || | |
107 | timestamp_is_set(ts->boottime); | |
fe624c4c LP |
108 | } |
109 | ||
110 | usec_t triple_timestamp_by_clock(triple_timestamp *ts, clockid_t clock); | |
111 | ||
44a6b1b6 | 112 | usec_t timespec_load(const struct timespec *ts) _pure_; |
3a730176 | 113 | nsec_t timespec_load_nsec(const struct timespec *ts) _pure_; |
9a98c7a1 | 114 | struct timespec *timespec_store(struct timespec *ts, usec_t u); |
cd1361e2 | 115 | struct timespec *timespec_store_nsec(struct timespec *ts, nsec_t n); |
9a98c7a1 | 116 | |
44a6b1b6 | 117 | usec_t timeval_load(const struct timeval *tv) _pure_; |
9a98c7a1 LP |
118 | struct timeval *timeval_store(struct timeval *tv, usec_t u); |
119 | ||
7b3eb5c9 | 120 | char *format_timestamp_style(char *buf, size_t l, usec_t t, TimestampStyle style); |
bbb8486e | 121 | char *format_timestamp_relative(char *buf, size_t l, usec_t t); |
2fa4092c | 122 | char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy); |
9a98c7a1 | 123 | |
7b3eb5c9 LB |
124 | static inline char *format_timestamp(char *buf, size_t l, usec_t t) { |
125 | return format_timestamp_style(buf, l, t, TIMESTAMP_PRETTY); | |
126 | } | |
127 | ||
9a98c7a1 LP |
128 | int parse_timestamp(const char *t, usec_t *usec); |
129 | ||
7f602784 | 130 | int parse_sec(const char *t, usec_t *usec); |
0004f698 | 131 | int parse_sec_fix_0(const char *t, usec_t *usec); |
7b61ce3c | 132 | int parse_sec_def_infinity(const char *t, usec_t *usec); |
519cffec | 133 | int parse_time(const char *t, usec_t *usec, usec_t default_unit); |
9a98c7a1 | 134 | int parse_nsec(const char *t, nsec_t *nsec); |
03cc26dd LP |
135 | |
136 | bool ntp_synced(void); | |
75683450 LP |
137 | |
138 | int get_timezones(char ***l); | |
089fb865 | 139 | bool timezone_is_valid(const char *name, int log_level); |
77ff2de9 | 140 | |
3411372e | 141 | bool clock_boottime_supported(void); |
fe624c4c | 142 | bool clock_supported(clockid_t clock); |
77ff2de9 | 143 | clockid_t clock_boottime_or_monotonic(void); |
babc21fd | 144 | |
1007ec60 LP |
145 | usec_t usec_shift_clock(usec_t, clockid_t from, clockid_t to); |
146 | ||
5c904ba5 | 147 | int get_timezone(char **timezone); |
7c67c79c HV |
148 | |
149 | time_t mktime_or_timegm(struct tm *tm, bool utc); | |
150 | struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc); | |
87b8ce69 | 151 | |
77372afb YW |
152 | uint32_t usec_to_jiffies(usec_t usec); |
153 | usec_t jiffies_to_usec(uint32_t jiffies); | |
53f555b6 | 154 | |
9a9a4f10 LP |
155 | bool in_utc_timezone(void); |
156 | ||
53f555b6 LP |
157 | static inline usec_t usec_add(usec_t a, usec_t b) { |
158 | usec_t c; | |
159 | ||
160 | /* Adds two time values, and makes sure USEC_INFINITY as input results as USEC_INFINITY in output, and doesn't | |
161 | * overflow. */ | |
162 | ||
163 | c = a + b; | |
164 | if (c < a || c < b) /* overflow check */ | |
165 | return USEC_INFINITY; | |
166 | ||
167 | return c; | |
168 | } | |
5d634ca8 | 169 | |
54d8ef14 | 170 | static inline usec_t usec_sub_unsigned(usec_t timestamp, usec_t delta) { |
5d634ca8 | 171 | |
04a1d84c LP |
172 | if (timestamp == USEC_INFINITY) /* Make sure infinity doesn't degrade */ |
173 | return USEC_INFINITY; | |
54d8ef14 | 174 | if (timestamp < delta) |
04a1d84c LP |
175 | return 0; |
176 | ||
177 | return timestamp - delta; | |
5d634ca8 | 178 | } |
1bb4b028 | 179 | |
54d8ef14 LP |
180 | static inline usec_t usec_sub_signed(usec_t timestamp, int64_t delta) { |
181 | if (delta < 0) | |
182 | return usec_add(timestamp, (usec_t) (-delta)); | |
183 | else | |
184 | return usec_sub_unsigned(timestamp, (usec_t) delta); | |
185 | } | |
186 | ||
1bb4b028 LP |
187 | #if SIZEOF_TIME_T == 8 |
188 | /* The last second we can format is 31. Dec 9999, 1s before midnight, because otherwise we'd enter 5 digit year | |
189 | * territory. However, since we want to stay away from this in all timezones we take one day off. */ | |
190 | #define USEC_TIMESTAMP_FORMATTABLE_MAX ((usec_t) 253402214399000000) | |
191 | #elif SIZEOF_TIME_T == 4 | |
192 | /* With a 32bit time_t we can't go beyond 2038... */ | |
193 | #define USEC_TIMESTAMP_FORMATTABLE_MAX ((usec_t) 2147483647000000) | |
194 | #else | |
ead6bd25 | 195 | #error "Yuck, time_t is neither 4 nor 8 bytes wide?" |
1bb4b028 | 196 | #endif |
4f811d27 LP |
197 | |
198 | int time_change_fd(void); | |
7b3eb5c9 LB |
199 | |
200 | const char* timestamp_style_to_string(TimestampStyle t) _const_; | |
201 | TimestampStyle timestamp_style_from_string(const char *s) _pure_; |