clock_gettime man page on CentOS

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

NAME
       clock_gettime  - Return the current timespec value of tp for the speciā€
       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.

       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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