\" $NetBSD: sem_destroy.3,v 1.2 2007/08/07 20:45:05 wiz Exp $

\" $NetBSD: sem_destroy.3,v 1.2 2007/08/07 20:45:05 wiz Exp $
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Dd January 22, 2003
Dt SEM_DESTROY 3
Os
Sh NAME
Nm sem_destroy
Nd destroy an unnamed semaphore
Sh LIBRARY
Lb librt
Sh SYNOPSIS
In semaphore.h
Ft int
Fn sem_destroy "sem_t *sem"
Sh DESCRIPTION
The
Fn sem_destroy
function destroys the unnamed semaphore pointed to by
Fa sem .
After a successful call to
Fn sem_destroy ,
Fa sem
is unusable until re-initialized by another call to
Fn sem_init .
Sh RETURN VALUES
Rv -std sem_destroy
Sh ERRORS
Fn sem_destroy
will fail if:
Bl -tag -width Er
It Bq Er EBUSY
There are currently threads blocked on the semaphore that
Fa sem
points to.
It Bq Er EINVAL
Fa sem
points to an invalid semaphore.
El
Sh SEE ALSO
Xr sem_init 3
Sh STANDARDS
Fn sem_destroy
conforms to
St -p1003.1-96 .
Pp
POSIX does not define the behavior of
Fn sem_destroy
if called while there are threads blocked on
Fa sem ,
but this implementation is guaranteed to return \-1 and set
Va errno
to
Er EBUSY
if there are threads blocked on
Fa sem .