#define DUAL_TIMESTAMP_NULL ((struct dual_timestamp) { 0ULL, 0ULL })
usec_t now(clockid_t clock);
#define DUAL_TIMESTAMP_NULL ((struct dual_timestamp) { 0ULL, 0ULL })
usec_t now(clockid_t clock);
nsec_t now_nsec(clockid_t clock);
#endif // 0
dual_timestamp* dual_timestamp_get(dual_timestamp *ts);
dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u);
nsec_t now_nsec(clockid_t clock);
#endif // 0
dual_timestamp* dual_timestamp_get(dual_timestamp *ts);
dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u);
dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u);
dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u);
#endif // 0
dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u);
dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u);
#endif // 0
nsec_t timespec_load_nsec(const struct timespec *ts) _pure_;
char *format_timestamp(char *buf, size_t l, usec_t t);
nsec_t timespec_load_nsec(const struct timespec *ts) _pure_;
char *format_timestamp(char *buf, size_t l, usec_t t);
char *format_timestamp_utc(char *buf, size_t l, usec_t t);
#endif // 0
char *format_timestamp_us(char *buf, size_t l, usec_t t);
char *format_timestamp_utc(char *buf, size_t l, usec_t t);
#endif // 0
char *format_timestamp_us(char *buf, size_t l, usec_t t);
char *format_timestamp_us_utc(char *buf, size_t l, usec_t t);
#endif // 0
char *format_timestamp_relative(char *buf, size_t l, usec_t t);
char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy);
char *format_timestamp_us_utc(char *buf, size_t l, usec_t t);
#endif // 0
char *format_timestamp_relative(char *buf, size_t l, usec_t t);
char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy);
void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t);
int dual_timestamp_deserialize(const char *value, dual_timestamp *t);
void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t);
int dual_timestamp_deserialize(const char *value, dual_timestamp *t);
int parse_sec(const char *t, usec_t *usec);
int parse_time(const char *t, usec_t *usec, usec_t default_unit);
int parse_sec(const char *t, usec_t *usec);
int parse_time(const char *t, usec_t *usec, usec_t default_unit);
assert_message_se(strftime(buf, ELEMENTSOF(buf), fmt, tm) > 0, \
"xstrftime: " #buf "[] must be big enough")
assert_message_se(strftime(buf, ELEMENTSOF(buf), fmt, tm) > 0, \
"xstrftime: " #buf "[] must be big enough")
int get_timezone(char **timezone);
time_t mktime_or_timegm(struct tm *tm, bool utc);
#endif // 0
struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc);
int get_timezone(char **timezone);
time_t mktime_or_timegm(struct tm *tm, bool utc);
#endif // 0
struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc);