/* SPDX-License-Identifier: LGPL-2.1-or-later */ #pragma once #include #include #include #include #include #include typedef uint64_t usec_t; typedef uint64_t nsec_t; #define PRI_NSEC PRIu64 #define PRI_USEC PRIu64 #define NSEC_FMT "%" PRI_NSEC #define USEC_FMT "%" PRI_USEC #include "macro.h" typedef struct dual_timestamp { usec_t realtime; usec_t monotonic; } dual_timestamp; typedef struct triple_timestamp { usec_t realtime; usec_t monotonic; usec_t boottime; } triple_timestamp; typedef enum TimestampStyle { TIMESTAMP_PRETTY, TIMESTAMP_US, TIMESTAMP_UTC, TIMESTAMP_US_UTC, _TIMESTAMP_STYLE_MAX, _TIMESTAMP_STYLE_INVALID = -1, } TimestampStyle; #define USEC_INFINITY ((usec_t) UINT64_MAX) #define NSEC_INFINITY ((nsec_t) UINT64_MAX) #define MSEC_PER_SEC 1000ULL #define USEC_PER_SEC ((usec_t) 1000000ULL) #define USEC_PER_MSEC ((usec_t) 1000ULL) #define NSEC_PER_SEC ((nsec_t) 1000000000ULL) #define NSEC_PER_MSEC ((nsec_t) 1000000ULL) #define NSEC_PER_USEC ((nsec_t) 1000ULL) #define USEC_PER_MINUTE ((usec_t) (60ULL*USEC_PER_SEC)) #define NSEC_PER_MINUTE ((nsec_t) (60ULL*NSEC_PER_SEC)) #define USEC_PER_HOUR ((usec_t) (60ULL*USEC_PER_MINUTE)) #define NSEC_PER_HOUR ((nsec_t) (60ULL*NSEC_PER_MINUTE)) #define USEC_PER_DAY ((usec_t) (24ULL*USEC_PER_HOUR)) #define NSEC_PER_DAY ((nsec_t) (24ULL*NSEC_PER_HOUR)) #define USEC_PER_WEEK ((usec_t) (7ULL*USEC_PER_DAY)) #define NSEC_PER_WEEK ((nsec_t) (7ULL*NSEC_PER_DAY)) #define USEC_PER_MONTH ((usec_t) (2629800ULL*USEC_PER_SEC)) #define NSEC_PER_MONTH ((nsec_t) (2629800ULL*NSEC_PER_SEC)) #define USEC_PER_YEAR ((usec_t) (31557600ULL*USEC_PER_SEC)) #define NSEC_PER_YEAR ((nsec_t) (31557600ULL*NSEC_PER_SEC)) /* We assume a maximum timezone length of 6. TZNAME_MAX is not defined on Linux, but glibc internally initializes this * to 6. Let's rely on that. */ #define FORMAT_TIMESTAMP_MAX (3U+1U+10U+1U+8U+1U+6U+1U+6U+1U) #define FORMAT_TIMESTAMP_WIDTH 28U /* when outputting, assume this width */ #define FORMAT_TIMESTAMP_RELATIVE_MAX 256U #define FORMAT_TIMESPAN_MAX 64U #define TIME_T_MAX (time_t)((UINTMAX_C(1) << ((sizeof(time_t) << 3) - 1)) - 1) #define DUAL_TIMESTAMP_NULL ((struct dual_timestamp) {}) #define TRIPLE_TIMESTAMP_NULL ((struct triple_timestamp) {}) usec_t now(clockid_t clock); nsec_t now_nsec(clockid_t clock); usec_t map_clock_usec(usec_t from, clockid_t from_clock, clockid_t to_clock); 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); triple_timestamp* triple_timestamp_get(triple_timestamp *ts); triple_timestamp* triple_timestamp_from_realtime(triple_timestamp *ts, usec_t u); #define DUAL_TIMESTAMP_HAS_CLOCK(clock) \ IN_SET(clock, CLOCK_REALTIME, CLOCK_REALTIME_ALARM, CLOCK_MONOTONIC) #define TRIPLE_TIMESTAMP_HAS_CLOCK(clock) \ IN_SET(clock, CLOCK_REALTIME, CLOCK_REALTIME_ALARM, CLOCK_MONOTONIC, CLOCK_BOOTTIME, CLOCK_BOOTTIME_ALARM) static inline bool timestamp_is_set(usec_t timestamp) { return timestamp > 0 && timestamp != USEC_INFINITY; } static inline bool dual_timestamp_is_set(const dual_timestamp *ts) { return timestamp_is_set(ts->realtime) || timestamp_is_set(ts->monotonic); } static inline bool triple_timestamp_is_set(const triple_timestamp *ts) { return timestamp_is_set(ts->realtime) || timestamp_is_set(ts->monotonic) || timestamp_is_set(ts->boottime); } usec_t triple_timestamp_by_clock(triple_timestamp *ts, clockid_t clock); usec_t timespec_load(const struct timespec *ts) _pure_; nsec_t timespec_load_nsec(const struct timespec *ts) _pure_; struct timespec *timespec_store(struct timespec *ts, usec_t u); struct timespec *timespec_store_nsec(struct timespec *ts, nsec_t n); usec_t timeval_load(const struct timeval *tv) _pure_; struct timeval *timeval_store(struct timeval *tv, usec_t u); char *format_timestamp_style(char *buf, size_t l, usec_t t, TimestampStyle style); 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); static inline char *format_timestamp(char *buf, size_t l, usec_t t) { return format_timestamp_style(buf, l, t, TIMESTAMP_PRETTY); } int parse_timestamp(const char *t, usec_t *usec); int parse_sec(const char *t, usec_t *usec); int parse_sec_fix_0(const char *t, usec_t *usec); int parse_sec_def_infinity(const char *t, usec_t *usec); int parse_time(const char *t, usec_t *usec, usec_t default_unit); int parse_nsec(const char *t, nsec_t *nsec); bool ntp_synced(void); int get_timezones(char ***l); bool timezone_is_valid(const char *name, int log_level); bool clock_boottime_supported(void); bool clock_supported(clockid_t clock); clockid_t clock_boottime_or_monotonic(void); usec_t usec_shift_clock(usec_t, clockid_t from, clockid_t to); int get_timezone(char **timezone); time_t mktime_or_timegm(struct tm *tm, bool utc); struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc); uint32_t usec_to_jiffies(usec_t usec); usec_t jiffies_to_usec(uint32_t jiffies); bool in_utc_timezone(void); static inline usec_t usec_add(usec_t a, usec_t b) { usec_t c; /* Adds two time values, and makes sure USEC_INFINITY as input results as USEC_INFINITY in output, and doesn't * overflow. */ c = a + b; if (c < a || c < b) /* overflow check */ return USEC_INFINITY; return c; } static inline usec_t usec_sub_unsigned(usec_t timestamp, usec_t delta) { if (timestamp == USEC_INFINITY) /* Make sure infinity doesn't degrade */ return USEC_INFINITY; if (timestamp < delta) return 0; return timestamp - delta; } static inline usec_t usec_sub_signed(usec_t timestamp, int64_t delta) { if (delta < 0) return usec_add(timestamp, (usec_t) (-delta)); else return usec_sub_unsigned(timestamp, (usec_t) delta); } #if SIZEOF_TIME_T == 8 /* The last second we can format is 31. Dec 9999, 1s before midnight, because otherwise we'd enter 5 digit year * territory. However, since we want to stay away from this in all timezones we take one day off. */ #define USEC_TIMESTAMP_FORMATTABLE_MAX ((usec_t) 253402214399000000) #elif SIZEOF_TIME_T == 4 /* With a 32bit time_t we can't go beyond 2038... */ #define USEC_TIMESTAMP_FORMATTABLE_MAX ((usec_t) 2147483647000000) #else #error "Yuck, time_t is neither 4 nor 8 bytes wide?" #endif int time_change_fd(void); const char* timestamp_style_to_string(TimestampStyle t) _const_; TimestampStyle timestamp_style_from_string(const char *s) _pure_;