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.\" 257f3dea24SPeter Wemm.\" $FreeBSD$ 26c0e36632SAlexander Langer.\" 27*b6413b6dSPedro F. Giffuni.Dd August 17, 2018 28c0e36632SAlexander Langer.Dt PTHREAD_RWLOCKATTR_GETPSHARED 3 29c0e36632SAlexander Langer.Os 30c0e36632SAlexander Langer.Sh NAME 31c0e36632SAlexander Langer.Nm pthread_rwlockattr_getpshared 32da69a97fSAlexander Langer.Nd get the process shared attribute 33d8a78688SAlexey Zelkin.Sh LIBRARY 34ec7452f1SRuslan Ermilov.Lb libpthread 35c0e36632SAlexander Langer.Sh SYNOPSIS 3632eef9aeSRuslan Ermilov.In pthread.h 37c0e36632SAlexander Langer.Ft int 38*b6413b6dSPedro F. Giffuni.Fn pthread_rwlockattr_getpshared "const pthread_rwlockattr_t *restrict attr" "int *restrict pshared" 39c0e36632SAlexander Langer.Sh DESCRIPTION 40c0e36632SAlexander LangerThe 41c0e36632SAlexander Langer.Fn pthread_rwlockattr_getpshared 42c0e36632SAlexander Langerfunction is used to get the process shared setting of a read/write 435203edcdSRuslan Ermilovlock attribute object. 445203edcdSRuslan ErmilovThe setting is returned via 45c0e36632SAlexander Langer.Fa pshared , 46c0e36632SAlexander Langerand 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_getpshared 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_getpshared 669d09157aSPhilippe Charnierfunction may fail if: 67c0e36632SAlexander Langer.Bl -tag -width Er 68c0e36632SAlexander Langer.It Bq Er EINVAL 69c0e36632SAlexander LangerThe value specified by 70c0e36632SAlexander Langer.Fa attr 71c0e36632SAlexander Langeris invalid. 72c0e36632SAlexander Langer.El 739cbda590SRuslan Ermilov.Sh SEE ALSO 74e52a1af2SBaptiste Daroussin.Xr pthread_rwlock_init 3 , 759cbda590SRuslan Ermilov.Xr pthread_rwlockattr_init 3 , 76e52a1af2SBaptiste Daroussin.Xr pthread_rwlockattr_setpshared 3 779cbda590SRuslan Ermilov.Sh STANDARDS 789cbda590SRuslan ErmilovThe 799cbda590SRuslan Ermilov.Fn pthread_rwlockattr_getpshared 809cbda590SRuslan Ermilovfunction is expected to conform to 819cbda590SRuslan Ermilov.St -susv2 . 82c0e36632SAlexander Langer.Sh HISTORY 83c0e36632SAlexander LangerThe 84c0e36632SAlexander Langer.Fn pthread_rwlockattr_getpshared 85c0e36632SAlexander Langerfunction first appeared in 86c0e36632SAlexander Langer.Fx 3.0 . 87