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.Lb libthr 37.Sh SYNOPSIS 38.In pthread.h 39.Ft int 40.Fn pthread_rwlockattr_setpshared "pthread_rwlockattr_t *attr" "int pshared" 41.Sh DESCRIPTION 42The 43.Fn pthread_rwlockattr_setpshared 44function sets the process shared attribute of 45.Fa attr 46to the value referenced by 47.Fa pshared . 48The 49.Fa pshared 50argument may be one of two values: 51.Bl -tag -width PTHREAD_PROCESS_PRIVATE 52.It Dv PTHREAD_PROCESS_SHARED 53Any thread of any process that has access to the memory where the 54read/write lock resides can manipulate the lock. 55.It Dv PTHREAD_PROCESS_PRIVATE 56Only threads created within the same process as the thread that 57initialized the read/write lock can manipulate the lock. 58This is 59the default value. 60.El 61.Sh RETURN VALUES 62If successful, the 63.Fn pthread_rwlockattr_setpshared 64function will return zero. 65Otherwise an error number will be returned 66to indicate the error. 67.Sh ERRORS 68The 69.Fn pthread_rwlockattr_setpshared 70function will fail if: 71.Bl -tag -width Er 72.It Bq Er EINVAL 73The value specified by 74.Fa attr 75or 76.Fa pshared 77is invalid. 78.El 79.Sh SEE ALSO 80.Xr pthread_rwlockattr_getpshared 3 , 81.Xr pthread_rwlockattr_init 3 , 82.Xr pthread_rwlock_init 3 83.Sh STANDARDS 84The 85.Fn pthread_rwlockattr_setpshared 86function is expected to conform to 87.St -susv2 . 88.Sh HISTORY 89The 90.Fn pthread_rwlockattr_setpshared 91function first appeared in 92.Fx 3.0 . 93.Sh BUGS 94The 95.Dv PTHREAD_PROCESS_SHARED 96attribute is not supported. 97