CLOCK_GETRES

NAME

SYNOPSIS

long sys_clock_getres (clockid_t which_clock, struct timespec *tp);

DESCRIPTION

clock_gettime gets the resolution of any clock specified by the which_clock parameter, and places this information in the struct timespec pointed to by tp. 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

An invalid tp value was specified.

SEE ALSO

clock_gettext(2), clock_nanosleep(2), clock_settime(2)  

AUTHOR