4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
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.
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.
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/>.
29 typedef uint64_t usec_t;
30 typedef uint64_t nsec_t;
32 #define NSEC_FMT "%" PRIu64
33 #define USEC_FMT "%" PRIu64
37 typedef struct dual_timestamp {
42 #define USEC_INFINITY ((usec_t) -1)
43 #define NSEC_INFINITY ((nsec_t) -1)
45 #define MSEC_PER_SEC 1000ULL
46 #define USEC_PER_SEC ((usec_t) 1000000ULL)
47 #define USEC_PER_MSEC ((usec_t) 1000ULL)
48 #define NSEC_PER_SEC ((nsec_t) 1000000000ULL)
49 #define NSEC_PER_MSEC ((nsec_t) 1000000ULL)
50 #define NSEC_PER_USEC ((nsec_t) 1000ULL)
52 #define USEC_PER_MINUTE ((usec_t) (60ULL*USEC_PER_SEC))
53 #define NSEC_PER_MINUTE ((nsec_t) (60ULL*NSEC_PER_SEC))
54 #define USEC_PER_HOUR ((usec_t) (60ULL*USEC_PER_MINUTE))
55 #define NSEC_PER_HOUR ((nsec_t) (60ULL*NSEC_PER_MINUTE))
56 #define USEC_PER_DAY ((usec_t) (24ULL*USEC_PER_HOUR))
57 #define NSEC_PER_DAY ((nsec_t) (24ULL*NSEC_PER_HOUR))
58 #define USEC_PER_WEEK ((usec_t) (7ULL*USEC_PER_DAY))
59 #define NSEC_PER_WEEK ((nsec_t) (7ULL*NSEC_PER_DAY))
60 #define USEC_PER_MONTH ((usec_t) (2629800ULL*USEC_PER_SEC))
61 #define NSEC_PER_MONTH ((nsec_t) (2629800ULL*NSEC_PER_SEC))
62 #define USEC_PER_YEAR ((usec_t) (31557600ULL*USEC_PER_SEC))
63 #define NSEC_PER_YEAR ((nsec_t) (31557600ULL*NSEC_PER_SEC))
65 #define FORMAT_TIMESTAMP_MAX ((4*4+1)+11+9+4+1) /* weekdays can be unicode */
66 #define FORMAT_TIMESTAMP_WIDTH 28 /* when outputting, assume this width */
67 #define FORMAT_TIMESTAMP_RELATIVE_MAX 256
68 #define FORMAT_TIMESPAN_MAX 64
70 #define TIME_T_MAX (time_t)((UINTMAX_C(1) << ((sizeof(time_t) << 3) - 1)) - 1)
72 #define DUAL_TIMESTAMP_NULL ((struct dual_timestamp) { 0ULL, 0ULL })
74 usec_t now(clockid_t clock);
75 #if 0 /// UNNEEDED by elogind
76 nsec_t now_nsec(clockid_t clock);
79 dual_timestamp* dual_timestamp_get(dual_timestamp *ts);
80 dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u);
81 #if 0 /// UNNEEDED by elogind
82 dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u);
83 dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u);
86 static inline bool dual_timestamp_is_set(dual_timestamp *ts) {
87 return ((ts->realtime > 0 && ts->realtime != USEC_INFINITY) ||
88 (ts->monotonic > 0 && ts->monotonic != USEC_INFINITY));
91 usec_t timespec_load(const struct timespec *ts) _pure_;
92 struct timespec *timespec_store(struct timespec *ts, usec_t u);
94 usec_t timeval_load(const struct timeval *tv) _pure_;
95 struct timeval *timeval_store(struct timeval *tv, usec_t u);
97 char *format_timestamp(char *buf, size_t l, usec_t t);
98 #if 0 /// UNNEEDED by elogind
99 char *format_timestamp_utc(char *buf, size_t l, usec_t t);
101 char *format_timestamp_us(char *buf, size_t l, usec_t t);
102 #if 0 /// UNNEEDED by elogind
103 char *format_timestamp_us_utc(char *buf, size_t l, usec_t t);
105 char *format_timestamp_relative(char *buf, size_t l, usec_t t);
106 char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy);
108 #if 0 /// UNNEEDED by elogind
109 void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t);
110 int dual_timestamp_deserialize(const char *value, dual_timestamp *t);
112 int timestamp_deserialize(const char *value, usec_t *timestamp);
114 #if 0 /// UNNEEDED by elogind
115 int parse_timestamp(const char *t, usec_t *usec);
118 int parse_sec(const char *t, usec_t *usec);
119 int parse_time(const char *t, usec_t *usec, usec_t default_unit);
120 #if 0 /// UNNEEDED by elogind
121 int parse_nsec(const char *t, nsec_t *nsec);
123 bool ntp_synced(void);
125 int get_timezones(char ***l);
126 bool timezone_is_valid(const char *name);
129 bool clock_boottime_supported(void);
130 #if 0 /// UNNEEDED by elogind
131 clockid_t clock_boottime_or_monotonic(void);
134 #define xstrftime(buf, fmt, tm) \
135 assert_message_se(strftime(buf, ELEMENTSOF(buf), fmt, tm) > 0, \
136 "xstrftime: " #buf "[] must be big enough")
138 #if 0 /// UNNEEDED by elogind
139 int get_timezone(char **timezone);
141 time_t mktime_or_timegm(struct tm *tm, bool utc);
143 struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc);
145 #if 0 /// UNNEEDED by elogind
146 unsigned long usec_to_jiffies(usec_t usec);
149 static inline usec_t usec_add(usec_t a, usec_t b) {
152 /* Adds two time values, and makes sure USEC_INFINITY as input results as USEC_INFINITY in output, and doesn't
156 if (c < a || c < b) /* overflow check */
157 return USEC_INFINITY;
162 static inline usec_t usec_sub(usec_t timestamp, int64_t delta) {
164 return usec_add(timestamp, (usec_t) (-delta));
166 if (timestamp == USEC_INFINITY) /* Make sure infinity doesn't degrade */
167 return USEC_INFINITY;
169 if (timestamp < (usec_t) delta)
172 return timestamp - delta;