NAME
getclock — get current value of system-wide clock
SYNOPSIS
#include <sys/timers.h>
int getclock(int clock_type, struct timespec *tp);
DESCRIPTION
The
getclock()
function gets the current value
tp
of the specified system-wide clock,
clock_type.
getclock()
supports a
clock_type
of
TIMEOFDAY,
defined in
<sys/timers.h>,
which represents the time-of-day clock for the system.
For this clock, the values returned by
getclock()
represent the amount of time since the Epoch.
APPLICATION USAGE
getclock()
is thread-safe and async-cancel-safe.
RETURN VALUE
Upon successful completion,
getclock()
returns a value of zero;
otherwise it
returns a value of -1 and sets
errno
to indicate the error.
ERRORS
getclock()
fails if any of the following conditions are encountered:
- [EINVAL]
clock_type
does not specify a known system-wide clock.
- [EIO]
An error occurred while accessing the clock device.
FILES
/usr/include/sys/timers.h
STANDARDS CONFORMANCE
getclock(): AES
