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 LIBRARY 34.Lb libc_r 35.Lb libpthread 36.Sh SYNOPSIS 37.In pthread.h 38.Ft int 39.Fn pthread_rwlockattr_setpshared "pthread_rwlockattr_t *attr" "int pshared" 40.Sh DESCRIPTION 41The 42.Fn pthread_rwlockattr_setpshared 43function sets the process shared attribute of 44.Fa attr 45to the value referenced by 46.Fa pshared . 47The 48.Fa pshared 49argument may be one of two values: 50.Bl -tag -width PTHREAD_PROCESS_PRIVATE 51.It Dv PTHREAD_PROCESS_SHARED 52Any thread of any process that has access to the memory where the 53read/write lock resides can manipulate the lock. 54.It Dv PTHREAD_PROCESS_PRIVATE 55Only threads created within the same process as the thread that 56initialized the read/write lock can manipulate the lock. This is 57the default value. 58.El 59.Sh RETURN VALUES 60If successful, the 61.Fn pthread_rwlockattr_setpshared 62function will return zero. Otherwise an error number will be returned 63to indicate the error. 64.Sh SEE ALSO 65.Xr pthread_rwlockattr_getpshared 3 , 66.Xr pthread_rwlockattr_init 3 , 67.Xr pthread_rwlock_init 3 68.Sh STANDARDS 69The 70.Fn pthread_rwlockattr_setpshared 71function is expected to conform to 72.St -susv2 . 73.Sh ERRORS 74The 75.Fn pthread_rwlockattr_setpshared 76function will fail if: 77.Bl -tag -width Er 78.It Bq Er EINVAL 79The value specified by 80.Fa attr 81or 82.Fa pshared 83is invalid. 84.El 85.Sh HISTORY 86The 87.Fn pthread_rwlockattr_setpshared 88function first appeared in 89.Fx 3.0 . 90.Sh BUGS 91The 92.Dv PTHREAD_PROCESS_SHARED 93attribute is not supported. 94