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. This is 58the default value. 59.El 60.Sh RETURN VALUES 61If successful, the 62.Fn pthread_rwlockattr_setpshared 63function will return zero. Otherwise an error number will be returned 64to indicate the error. 65.Sh SEE ALSO 66.Xr pthread_rwlockattr_getpshared 3 , 67.Xr pthread_rwlockattr_init 3 , 68.Xr pthread_rwlock_init 3 69.Sh STANDARDS 70The 71.Fn pthread_rwlockattr_setpshared 72function is expected to conform to 73.St -susv2 . 74.Sh ERRORS 75The 76.Fn pthread_rwlockattr_setpshared 77function will fail if: 78.Bl -tag -width Er 79.It Bq Er EINVAL 80The value specified by 81.Fa attr 82or 83.Fa pshared 84is invalid. 85.El 86.Sh HISTORY 87The 88.Fn pthread_rwlockattr_setpshared 89function first appeared in 90.Fx 3.0 . 91.Sh BUGS 92The 93.Dv PTHREAD_PROCESS_SHARED 94attribute is not supported. 95