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.\" 25*631e4e3aSJilles Tjoelker.Dd May 31, 2016 26c0e36632SAlexander Langer.Dt PTHREAD_RWLOCKATTR_SETPSHARED 3 27c0e36632SAlexander Langer.Os 28c0e36632SAlexander Langer.Sh NAME 29c0e36632SAlexander Langer.Nm pthread_rwlockattr_setpshared 30c0e36632SAlexander Langer.Nd set the process shared attribute 31d8a78688SAlexey Zelkin.Sh LIBRARY 32ec7452f1SRuslan Ermilov.Lb libpthread 33c0e36632SAlexander Langer.Sh SYNOPSIS 3432eef9aeSRuslan Ermilov.In pthread.h 35c0e36632SAlexander Langer.Ft int 36e7589db8SBruce Evans.Fn pthread_rwlockattr_setpshared "pthread_rwlockattr_t *attr" "int pshared" 37c0e36632SAlexander Langer.Sh DESCRIPTION 38c0e36632SAlexander LangerThe 39c0e36632SAlexander Langer.Fn pthread_rwlockattr_setpshared 40c0e36632SAlexander Langerfunction sets the process shared attribute of 41c0e36632SAlexander Langer.Fa attr 42c0e36632SAlexander Langerto the value referenced by 43c0e36632SAlexander Langer.Fa pshared . 449d09157aSPhilippe CharnierThe 45c0e36632SAlexander Langer.Fa pshared 469d09157aSPhilippe Charnierargument may be one of two values: 470d42ab24SRuslan Ermilov.Bl -tag -width PTHREAD_PROCESS_PRIVATE 480d42ab24SRuslan Ermilov.It Dv PTHREAD_PROCESS_SHARED 49c0e36632SAlexander LangerAny thread of any process that has access to the memory where the 50c0e36632SAlexander Langerread/write lock resides can manipulate the lock. 510d42ab24SRuslan Ermilov.It Dv PTHREAD_PROCESS_PRIVATE 52c0e36632SAlexander LangerOnly threads created within the same process as the thread that 535203edcdSRuslan Ermilovinitialized the read/write lock can manipulate the lock. 545203edcdSRuslan ErmilovThis is 55c0e36632SAlexander Langerthe default value. 56c0e36632SAlexander Langer.El 57c0e36632SAlexander Langer.Sh RETURN VALUES 58c0e36632SAlexander LangerIf successful, the 59c0e36632SAlexander Langer.Fn pthread_rwlockattr_setpshared 605203edcdSRuslan Ermilovfunction will return zero. 615203edcdSRuslan ErmilovOtherwise an error number will be returned 62c0e36632SAlexander Langerto indicate the error. 63c0e36632SAlexander Langer.Sh ERRORS 649d09157aSPhilippe CharnierThe 65c0e36632SAlexander Langer.Fn pthread_rwlockattr_setpshared 669d09157aSPhilippe Charnierfunction will fail if: 67c0e36632SAlexander Langer.Bl -tag -width Er 68c0e36632SAlexander Langer.It Bq Er EINVAL 69c0e36632SAlexander LangerThe value specified by 70c0e36632SAlexander Langer.Fa attr 71c0e36632SAlexander Langeror 72c0e36632SAlexander Langer.Fa pshared 73c0e36632SAlexander Langeris invalid. 74c0e36632SAlexander Langer.El 759cbda590SRuslan Ermilov.Sh SEE ALSO 76e52a1af2SBaptiste Daroussin.Xr pthread_rwlock_init 3 , 779cbda590SRuslan Ermilov.Xr pthread_rwlockattr_getpshared 3 , 78e52a1af2SBaptiste Daroussin.Xr pthread_rwlockattr_init 3 799cbda590SRuslan Ermilov.Sh STANDARDS 809cbda590SRuslan ErmilovThe 819cbda590SRuslan Ermilov.Fn pthread_rwlockattr_setpshared 829cbda590SRuslan Ermilovfunction is expected to conform to 839cbda590SRuslan Ermilov.St -susv2 . 84c0e36632SAlexander Langer.Sh HISTORY 85c0e36632SAlexander LangerThe 86c0e36632SAlexander Langer.Fn pthread_rwlockattr_setpshared 87c0e36632SAlexander Langerfunction first appeared in 88c0e36632SAlexander Langer.Fx 3.0 . 89*631e4e3aSJilles TjoelkerSupport for process-shared read/write locks appeared in 90*631e4e3aSJilles Tjoelker.Fx 11.0 . 91