CLOCK_GETTIME(2) Linux Programmer’s Manual CLOCK_GETTIME(2)
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
Linux 2.6 2004-March-12 CLOCK_GETTIME(2)
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