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-.\" Copyright (c) 1998 Alex Nash
-.\" 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, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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 August 4, 1998
-.Dt PTHREAD_RWLOCK_UNLOCK 3
-.Os
-.Sh NAME
-.Nm pthread_rwlock_unlock
-.Nd release a read/write lock
-.Sh LIBRARY
-.Lb libc_r
-.Sh SYNOPSIS
-.In pthread.h
-.Ft int
-.Fn pthread_rwlock_unlock "pthread_rwlock_t *lock"
-.Sh DESCRIPTION
-The
-.Fn pthread_rwlock_unlock
-function is used to release the read/write lock previously obtained by
-.Fn pthread_rwlock_rdlock ,
-.Fn pthread_rwlock_wrlock ,
-.Fn pthread_rwlock_tryrdlock ,
-or
-.Fn pthread_rwlock_trywrlock .
-.Sh RETURN VALUES
-If successful, the
-.Fn pthread_rwlock_unlock
-function will return zero.  Otherwise an error number will be returned
-to indicate the error.
-.Pp
-The results are undefined if
-.Fa lock
-is not held by the calling thread.
-.Sh SEE ALSO
-.Xr pthread_rwlock_rdlock 3 ,
-.Xr pthread_rwlock_wrlock 3
-.Sh STANDARDS
-The
-.Fn pthread_rwlock_unlock
-function is expected to conform to
-.St -susv2 .
-.Sh ERRORS
-The
-.Fn pthread_rwlock_unlock
-function may fail if:
-.Bl -tag -width Er
-.It Bq Er EINVAL
-The value specified by
-.Fa lock
-is invalid.
-.It Bq Er EPERM
-The current thread does not own the read/write lock.
-.El
-.Sh HISTORY
-The
-.Fn pthread_rwlock_unlock
-function first appeared in
-.Fx 3.0 .