clock_gettime(2) -- Linux man page
NAME
clock_gettime - Return the current timespec value of tp
for the specified clock
SYNOPSIS
-
- long sys_clock_gettime (clockid_t which_clock, struct timespec *tp);
DESCRIPTION
clock_gettime returns the current timespec value of tp for
the specific clock, which_clock.
The values that clockid_t currently supports for POSIX.1b timers,
as defined in include/linux/time.h, are:
- CLOCK_REALTIME
-
Systemwide realtime clock.
- CLOCK_MONOTONIC
-
Represents monotonic time. Cannot be set.
- CLOCK_PROCESS_CPUTIME_ID
-
High resolution per-process timer.
- CLOCK_THREAD_CPUTIME_ID
-
Thread-specific timer.
- CLOCK_REALTIME_HR
-
High resolution version of CLOCK_REALTIME.
- CLOCK_MONOTONIC_HR
-
High resolution version of CLOCK_MONOTONIC.
RETURN VALUE
clock_gettime returns 0 on success; otherwise, it returns one of the errors listed in the "Errors" section.
ERRORS
- -EINVAL
-
An invalid which_clock value was specified.
- -EFAULT
-
Can not coy to tp value.
SEE ALSO
clock_getres(2), clock_nanosleep(2), clock_settime(2)
AUTHOR
Niki Rahimi
|
