1.\" Copyright (c) 1998 Alex Nash 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd August 4, 1998 28.Dt PTHREAD_RWLOCKATTR_SETPSHARED 3 29.Os 30.Sh NAME 31.Nm pthread_rwlockattr_setpshared 32.Nd set the process shared attribute 33.Sh SYNOPSIS 34.Fd #include <pthread.h> 35.Ft int 36.Fn pthread_rwlockattr_setpshared "pthread_rwlockattr_t *attr" "int pshared" 37.Sh DESCRIPTION 38The 39.Fn pthread_rwlockattr_setpshared 40function sets the process shared attribute of 41.Fa attr 42to the value referenced by 43.Fa pshared . 44.Fa pshared 45may be one of two values: 46.Bl -hang -offset flag -width 123456789012345678901234 47.It Ar PTHREAD_PROCESS_SHARED 48Any thread of any process that has access to the memory where the 49read/write lock resides can manipulate the lock. 50.It Ar PTHREAD_PROCESS_PRIVATE 51Only threads created within the same process as the thread that 52initialized the read/write lock can manipulate the lock. This is 53the default value. 54.El 55.Sh RETURN VALUES 56If successful, the 57.Fn pthread_rwlockattr_setpshared 58function will return zero. Otherwise an error number will be returned 59to indicate the error. 60.Sh SEE ALSO 61.Xr pthread_rwlock_init 3 , 62.Xr pthread_rwlockattr_init 3 , 63.Xr pthread_rwlockattr_setpshared 3 64.Sh STANDARDS 65The 66.Fn pthread_rwlockattr_setpshared 67function is expected to conform to 68.St -susv2 . 69.Sh ERRORS 70.Fn pthread_rwlockattr_setpshared 71will fail if: 72.Bl -tag -width Er 73.It Bq Er EINVAL 74The value specified by 75.Fa attr 76or 77.Fa pshared 78is invalid. 79.El 80.Sh HISTORY 81The 82.Fn pthread_rwlockattr_setpshared 83function first appeared in 84.Fx 3.0 . 85.Sh BUGS 86The PTHREAD_PROCESS_SHARED attribute is not supported. 87