mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-27 11:55:06 +00:00
fccedf067d
- sem_*(3) manpages were repocopied from libc_r. Reviewed by: deischen Repocopy by: markm
85 lines
2.5 KiB
Groff
85 lines
2.5 KiB
Groff
.\" Copyright (C) 2000 Jason Evans <jasone@FreeBSD.org>.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice(s), this list of conditions and the following disclaimer as
|
|
.\" the first lines of this file unmodified other than the possible
|
|
.\" addition of one or more copyright notices.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice(s), this list of conditions and the following disclaimer in
|
|
.\" the documentation and/or other materials provided with the
|
|
.\" distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
|
|
.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
|
|
.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
|
.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
|
.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.Dd February 15, 2000
|
|
.Dt SEM_DESTROY 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm sem_destroy
|
|
.Nd destroy an unnamed semaphore
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.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
|
|
The
|
|
.Fn sem_destroy
|
|
function will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
.Fa sem
|
|
points to an invalid semaphore.
|
|
.It Bq Er EBUSY
|
|
There are currently threads blocked on the semaphore that
|
|
.Fa sem
|
|
points to.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr sem_init 3 ,
|
|
.Xr sem 4
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn sem_destroy
|
|
function 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 .
|