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+.\" Portions Copyright (c) 2001 Apple Computer, Inc. All Rights Reserved.
+.\" Copyright (c) 1997 Brian Cully <shmit@kublai.com>
+.\" 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.
+.\" 3. Neither the name of the author nor the names of any co-contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL 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 REGENTS 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: src/lib/libc_r/man/pthread_cond_wait.3,v 1.8.2.4 2001/08/17 15:42:51 ru Exp $
+.\"
+.Dd November 5, 2001
+.Dt PTHREAD_COND_WAIT 3
+.Os Darwin
+.Sh NAME
+.Nm pthread_cond_wait
+.Nd wait on a condition variable
+.Sh SYNOPSIS
+.Fd #include <pthread.h>
+.Ft int
+.Fn pthread_cond_wait "pthread_cond_t *cond" "pthread_mutex_t *mutex"
+.Sh DESCRIPTION
+The
+.Fn pthread_cond_wait
+function atomically unlocks the 
+.Fa mutex 
+argument and waits on the 
+.Fa cond
+argument.
+.Sh RETURN VALUES
+If successful, the
+.Fn pthread_cond_wait
+function will return zero.
+Otherwise an error number will be returned to
+indicate the error.
+.Sh ERRORS
+.Fn pthread_cond_wait
+will fail if:
+.Bl -tag -width Er
+.It Bq Er EINVAL
+The value specified by
+.Fa cond
+or the value specified by
+.Fa mutex
+is invalid.
+.El
+.Sh SEE ALSO
+.Xr pthread_cond_broadcast 3 ,
+.Xr pthread_cond_destroy 3 ,
+.Xr pthread_cond_init 3 ,
+.Xr pthread_cond_signal 3 ,
+.Xr pthread_cond_timedwait 3
+.Sh STANDARDS
+.Fn pthread_cond_wait
+conforms to
+.St -p1003.1-96 .