1.\" $NetBSD: pthread_rwlockattr.3,v 1.8 2010/07/09 08:51:28 jruoho Exp $ 2.\" 3.\" Copyright (c) 2002 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 14.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 15.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 17.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 23.\" POSSIBILITY OF SUCH DAMAGE. 24.\" 25.\" Copyright (c) 1998 Alex Nash 26.\" All rights reserved. 27.\" 28.\" Redistribution and use in source and binary forms, with or without 29.\" modification, are permitted provided that the following conditions 30.\" are met: 31.\" 1. Redistributions of source code must retain the above copyright 32.\" notice, this list of conditions and the following disclaimer. 33.\" 2. Redistributions in binary form must reproduce the above copyright 34.\" notice, this list of conditions and the following disclaimer in the 35.\" documentation and/or other materials provided with the distribution. 36.\" 37.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 38.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 39.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 40.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 41.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 42.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 43.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 45.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 46.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 47.\" SUCH DAMAGE. 48.\" 49.\" $FreeBSD: src/lib/libpthread/man/pthread_rwlockattr_init.3,v 1.7 2002/09/16 19:29:29 mini Exp $ 50.\" 51.Dd July 9, 2010 52.Dt PTHREAD_RWLOCKATTR 3 53.Os 54.Sh NAME 55.Nm pthread_rwlockattr_init , 56.Nm pthread_rwlockattr_destroy 57.Nd initialize or destroy read/write lock attributes 58.Sh LIBRARY 59.Lb libpthread 60.Sh SYNOPSIS 61.In pthread.h 62.Ft int 63.Fn pthread_rwlockattr_init "pthread_rwlockattr_t *attr" 64.Ft int 65.Fn pthread_rwlockattr_destroy "pthread_rwlockattr_t *attr" 66.Sh DESCRIPTION 67The 68.Fn pthread_rwlockattr_init 69function is used to initialize a read/write lock attributes object. 70.Pp 71The 72.Fn pthread_rwlockattr_destroy 73function is used to destroy a read/write lock attribute object 74previously created with 75.Fn pthread_rwlockattr_init . 76.Sh RETURN VALUES 77If successful, the 78.Fn pthread_rwlockattr_init 79and 80.Fn pthread_rwlockattr_destroy 81functions return zero. 82Otherwise an error number will be returned to indicate the error. 83.Sh ERRORS 84.Fn pthread_rwlockattr_init 85shall fail if: 86.Bl -tag -width Er 87.It Bq Er ENOMEM 88Insufficient memory exists to initialize the read/write lock attributes object. 89.El 90.Pp 91.Fn pthread_rwlockattr_init 92and 93.Fn pthread_rwlockattr_destroy 94may fail if: 95.Bl -tag -width Er 96.It Bq Er EINVAL 97The value specified by 98.Fa attr 99is invalid. 100.El 101.Sh SEE ALSO 102.Xr pthread_rwlock_init 3 103.Sh STANDARDS 104Both functions conform to 105.St -p1003.1-2001 . 106