CLOCK_GETTIME(2) Linux Programmer s Manual CLOCK_GETTIME(2)

NAME clock_gettime - Return the current timespec value of tp for the speci- fied 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.

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

Linux 2.6 2004-March-12 CLOCK_GETTIME(2)