1c0e36632SAlexander Langer.\" Copyright (c) 1998 Alex Nash 2c0e36632SAlexander Langer.\" All rights reserved. 3c0e36632SAlexander Langer.\" 4c0e36632SAlexander Langer.\" Redistribution and use in source and binary forms, with or without 5c0e36632SAlexander Langer.\" modification, are permitted provided that the following conditions 6c0e36632SAlexander Langer.\" are met: 7c0e36632SAlexander Langer.\" 1. Redistributions of source code must retain the above copyright 8c0e36632SAlexander Langer.\" notice, this list of conditions and the following disclaimer. 9c0e36632SAlexander Langer.\" 2. Redistributions in binary form must reproduce the above copyright 10c0e36632SAlexander Langer.\" notice, this list of conditions and the following disclaimer in the 11c0e36632SAlexander Langer.\" documentation and/or other materials provided with the distribution. 12c0e36632SAlexander Langer.\" 13c0e36632SAlexander Langer.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14c0e36632SAlexander Langer.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15c0e36632SAlexander Langer.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16c0e36632SAlexander Langer.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17c0e36632SAlexander Langer.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18c0e36632SAlexander Langer.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19c0e36632SAlexander Langer.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20c0e36632SAlexander Langer.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21c0e36632SAlexander Langer.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22c0e36632SAlexander Langer.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23c0e36632SAlexander Langer.\" SUCH DAMAGE. 24c0e36632SAlexander Langer.\" 25dcb964faSBruce Evans.\" $Id: pthread_rwlockattr_getpshared.3,v 1.1 1998/09/07 19:01:43 alex Exp $ 26c0e36632SAlexander Langer.\" 27c0e36632SAlexander Langer.Dd August 4, 1998 28c0e36632SAlexander Langer.Dt PTHREAD_RWLOCKATTR_GETPSHARED 3 29c0e36632SAlexander Langer.Os 30c0e36632SAlexander Langer.Sh NAME 31c0e36632SAlexander Langer.Nm pthread_rwlockattr_getpshared 32c0e36632SAlexander Langer.Nd set the process shared attribute 33c0e36632SAlexander Langer.Sh SYNOPSIS 34c0e36632SAlexander Langer.Fd #include <pthread.h> 35c0e36632SAlexander Langer.Ft int 36dcb964faSBruce Evans.Fn pthread_rwlockattr_getpshared "const pthread_rwlockattr_t *attr" "int *pshared" 37c0e36632SAlexander Langer.Sh DESCRIPTION 38c0e36632SAlexander LangerThe 39c0e36632SAlexander Langer.Fn pthread_rwlockattr_getpshared 40c0e36632SAlexander Langerfunction is used to get the process shared setting of a read/write 41c0e36632SAlexander Langerlock attribute object. The setting is returned via 42c0e36632SAlexander Langer.Fa pshared , 43c0e36632SAlexander Langerand may be one of two values: 44c0e36632SAlexander Langer.Bl -hang -offset flag -width 123456789012345678901234 45c0e36632SAlexander Langer.It Ar PTHREAD_PROCESS_SHARED 46c0e36632SAlexander LangerAny thread of any process that has access to the memory where the 47c0e36632SAlexander Langerread/write lock resides can manipulate the lock. 48c0e36632SAlexander Langer.It Ar PTHREAD_PROCESS_PRIVATE 49c0e36632SAlexander LangerOnly threads created within the same process as the thread that 50c0e36632SAlexander Langerinitialized the read/write lock can manipulate the lock. This is 51c0e36632SAlexander Langerthe default value. 52c0e36632SAlexander Langer.El 53c0e36632SAlexander Langer.Sh RETURN VALUES 54c0e36632SAlexander LangerIf successful, the 55c0e36632SAlexander Langer.Fn pthread_rwlockattr_getpshared 56c0e36632SAlexander Langerfunction will return zero. Otherwise an error number will be returned 57c0e36632SAlexander Langerto indicate the error. 58c0e36632SAlexander Langer.Sh SEE ALSO 59c0e36632SAlexander Langer.Xr pthread_rwlock_init 3 , 60c0e36632SAlexander Langer.Xr pthread_rwlockattr_init 3 , 61c0e36632SAlexander Langer.Xr pthread_rwlockattr_setpshared 3 62c0e36632SAlexander Langer.Sh STANDARDS 63c0e36632SAlexander LangerThe 64c0e36632SAlexander Langer.Fn pthread_rwlockattr_getpshared 65c0e36632SAlexander Langerfunction is expected to conform to 66c0e36632SAlexander Langer.St -susv2 . 67c0e36632SAlexander Langer.Sh ERRORS 68c0e36632SAlexander Langer.Fn pthread_rwlockattr_getpshared 69c0e36632SAlexander Langermay fail if: 70c0e36632SAlexander Langer.Bl -tag -width Er 71c0e36632SAlexander Langer.It Bq Er EINVAL 72c0e36632SAlexander LangerThe value specified by 73c0e36632SAlexander Langer.Fa attr 74c0e36632SAlexander Langeris invalid. 75c0e36632SAlexander Langer.El 76c0e36632SAlexander Langer.Sh HISTORY 77c0e36632SAlexander LangerThe 78c0e36632SAlexander Langer.Fn pthread_rwlockattr_getpshared 79c0e36632SAlexander Langerfunction first appeared in 80c0e36632SAlexander Langer.Fx 3.0 . 81