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+.\" 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.
+.\"
+.Dd July 29, 1998
+.Dt PTHREAD_MUTEX_INIT 3
+.Os BSD 4
+.Sh NAME
+.Nm pthread_mutex_init
+.Nd create a mutex
+.Sh SYNOPSIS
+.Fd #include <pthread.h>
+.Ft int
+.Fn pthread_mutex_init "pthread_mutex_t *mutex" "const pthread_mutexattr_t *attr"
+.Sh DESCRIPTION
+The
+.Fn pthread_mutex_init
+function creates a new mutex, with attributes specified with
+.Fa attr .
+If
+.Fa attr
+is NULL the default attributes are used.
+.Sh RETURN VALUES
+If successful,
+.Fn pthread_mutex_init
+will return zero and put the new mutex id into
+.Fa mutex ,
+otherwise an error number will be returned to indicate the error.
+.Sh ERRORS
+.Fn pthread_mutex_init
+will fail if:
+.Bl -tag -width Er
+.It Bq Er EINVAL
+The value specified by
+.Fa attr
+is invalid.
+.It Bq Er ENOMEM
+The process cannot allocate enough memory to create another mutex.
+.It Bq Er EAGAIN
+The temporarily lacks the resources to create another mutex.
+.El
+.Pp
+.Sh SEE ALSO
+.Xr pthreads 3 ,
+.Xr pthread_mutex_destroy 3 ,
+.Xr pthread_mutex_lock 3 ,
+.Xr pthread_mutex_unlock 3 ,
+.Xr pthread_mutex_trylock 3
+.Sh STANDARDS
+.Fn pthread_mutex_init
+conforms to ISO/IEC 9945-1 ANSI/IEEE
+.Pq Dq Tn POSIX
+Std 1003.1 Second Edition 1996-07-12.