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.\" $OpenBSD: pthread_barrier_wait.3,v 1.5 2020/04/06 00:01:08 pirofti Exp $
.\"
.\" Copyright (c) 2012 Paul Irofti <paul@irofti.net>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.\"
.Dd $Mdocdate: April 6 2020 $
.Dt PTHREAD_BARRIER_WAIT 3
.Os
.Sh NAME
.Nm pthread_barrier_wait
.Nd synchronize at a barrier
.Sh SYNOPSIS
.In pthread.h
.Ft int
.Fn pthread_barrier_wait "pthread_barrier_t *barrier"
.Sh DESCRIPTION
The
.Fn pthread_barrier_wait
function blocks the calling thread until the required number of threads
call
.Fn pthread_barrier_wait ,
as specified at the object's initialization.
.Sh RETURN VALUES
If successful,
.Fn pthread_barrier_wait
returns
.Dv PTHREAD_BARRIER_SERIAL_THREAD
for a single arbitrary thread and zero for each of the other threads;
otherwise an error number is returned to indicate the error.
.Sh ERRORS
.Fn pthread_barrier_wait
will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
The value specified by
.Fa barrier
is invalid.
.El
.Sh SEE ALSO
.Xr pthread_barrier_init 3 ,
.Xr pthread_barrierattr_getpshared 3 ,
.Xr pthread_barrierattr_init 3
.Sh STANDARDS
.Fn pthread_barrier_wait
conforms to
.St -p1003.1-2008 .
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