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posix-next API 0.1.0
Out-of-tree Zephyr POSIX module
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posix-next API 0.1.0
Out-of-tree Zephyr POSIX module
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<time.h>: POSIX time types, clocks, and timers More...
#include <stddef.h>#include <zephyr/sys/clock.h>#include <zephyr/toolchain.h>
Go to the source code of this file.
Data Structures | |
| struct | timespec |
| Time value with nanosecond resolution. More... | |
| struct | itimerspec |
| Interval timer specification used with timer_settime() and timer_gettime(). More... | |
Macros | |
| #define | _CLOCKID_T_DECLARED |
| #define | __clockid_t_defined |
| #define | _TIMER_T_DECLARED |
| #define | __timer_t_defined |
| #define | _LOCALE_T_DECLARED |
| #define | __locale_t_defined |
| #define | _PID_T_DECLARED |
| #define | __pid_t_defined |
| #define | _TIMESPEC_DECLARED |
| #define | __timespec_defined |
| #define | _ITIMERSPEC_DECLARED |
| #define | __itimerspec_defined |
| #define | CLOCK_REALTIME ((clockid_t)SYS_CLOCK_REALTIME) |
| Clock measuring real (wall-clock) time. | |
| #define | CLOCKS_PER_SEC 1000000 |
| Number of clock ticks per second as seen by clock(). | |
| #define | CLOCK_PROCESS_CPUTIME_ID ((clockid_t)2) |
| CPU-time clock for the calling process. | |
| #define | CLOCK_THREAD_CPUTIME_ID ((clockid_t)3) |
| CPU-time clock for the calling thread. | |
| #define | CLOCK_MONOTONIC ((clockid_t)SYS_CLOCK_MONOTONIC) |
| Monotonically increasing clock that cannot be set. | |
| #define | TIMER_ABSTIME SYS_TIMER_ABSTIME |
| Flag for clock_nanosleep() and timer_settime(): interpret time as absolute. | |
Typedefs | |
| typedef unsigned long | clockid_t |
| Identifies a clock (e.g. | |
| typedef unsigned long | timer_t |
| Opaque handle for a POSIX interval timer created with timer_create(). | |
| typedef void * | locale_t |
| Opaque locale object. | |
| typedef int | pid_t |
| Process ID type. | |
Functions | |
| char * | asctime_r (const struct tm *ZRESTRICT tm, char *ZRESTRICT buf) |
| Convert broken-down time to a string (thread-safe version of asctime()). | |
| int | clock_getcpuclockid (pid_t pid, clockid_t *clock_id) |
| Get the CPU-time clock ID for a process. | |
| int | clock_getres (clockid_t clock_id, struct timespec *ts) |
| Get the resolution of a clock. | |
| int | clock_gettime (clockid_t clock_id, struct timespec *ts) |
| Get the current time of a clock. | |
| int | clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *rqtp, struct timespec *rmtp) |
| High-resolution sleep against a specified clock. | |
| int | clock_settime (clockid_t clock_id, const struct timespec *ts) |
| Set the time of a clock. | |
| char * | ctime_r (const time_t *clock, char *buf) |
| Convert a time_t to a string (thread-safe version of ctime()). | |
| struct tm * | getdate (const char *string) |
| Convert a date-time string to broken-down time (XSI extension). | |
| struct tm * | gmtime_r (const time_t *ZRESTRICT timer, struct tm *ZRESTRICT result) |
| Convert a time_t to UTC broken-down time (thread-safe version of gmtime()). | |
| struct tm * | localtime_r (const time_t *ZRESTRICT timer, struct tm *ZRESTRICT result) |
| Convert a time_t to local broken-down time (thread-safe version of localtime()). | |
| int | nanosleep (const struct timespec *rqtp, struct timespec *rmtp) |
| Sleep for a specified number of nanoseconds (high-resolution sleep). | |
| size_t | strftime_l (char *ZRESTRICT s, size_t maxsize, const char *ZRESTRICT format, const struct tm *ZRESTRICT timeptr, locale_t locale) |
| Format broken-down time into a string using the specified locale. | |
| char * | strptime (const char *ZRESTRICT s, const char *ZRESTRICT format, struct tm *ZRESTRICT tm) |
| Parse a date/time string according to a format (XSI extension). | |
| int | timer_create (clockid_t clockId, struct sigevent *ZRESTRICT evp, timer_t *ZRESTRICT timerid) |
| Create a per-process timer. | |
| int | timer_delete (timer_t timerid) |
| Delete a per-process timer. | |
| int | timer_getoverrun (timer_t timerid) |
| Get the number of timer overruns since the last timer expiration notification. | |
| int | timer_gettime (timer_t timerid, struct itimerspec *its) |
| Get the time remaining until the next timer expiration. | |
| int | timer_settime (timer_t timerid, int flags, const struct itimerspec *value, struct itimerspec *ovalue) |
| Arm or disarm a per-process timer. | |
Variables | |
| int | daylight |
| Non-zero if Daylight Saving Time is in effect. | |
| long | timezone |
| Offset in seconds from UTC for the current timezone. | |
| char * | tzname [] |
| Timezone abbreviations; tzname[0] = std, tzname[1] = dst. | |
<time.h>: POSIX time types, clocks, and timers
Provides the clock identifiers, POSIX timer API, thread-safe time conversion helpers, and locale-aware time formatting that extend the C standard <time.h> interface.
Definition in file time.h.
Opaque handle for a POSIX interval timer created with timer_create().
1.9.8