NAME
gettimer — get value of a per-process timer
SYNOPSIS
#include <sys/timers.h>
int gettimer(timer_t timerid, struct itimerspec *value);
DESCRIPTION
The
gettimer()
function returns an
itimerspec
structure value to the
value
argument.
The
it_value
member of the structure
represents the amount of time in the current interval
before the timer expires for the timer specified in
timerid,
or zero if the timer is disabled.
The
it_interval
member has the value last set by
reltimer()
(see
reltimer(3C)).
The members of
value
are subject to the resolution of the timer (see
mktimer(3C)).
The behavior of this function is undefined if
value
is NULL.
APPLICATION USAGE
gettimer()
is thread-safe. It is not async-cancel-safe.
RETURN VALUE
Upon successful completion,
gettimer()
returns zero; otherwise, it returns -1 and sets
errno
to indicate the error.
ERRORS
gettimer()
fails if any of the following conditions are encountered:
- [EINVAL]
timerid
does not correspond to an ID
returned by
mktimer().
- [EIO]
An error occurred while accessing the clock device.
FILES
/usr/include/sys/timers.h
STANDARDS CONFORMANCE
gettimer(): AES
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