1998-09-07 19:01:43 +00:00
|
|
|
.\" Copyright (c) 1998 Alex Nash
|
|
|
|
|
.\" All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
|
.\" are met:
|
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
|
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
|
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
|
.\" SUCH DAMAGE.
|
|
|
|
|
.\"
|
1999-03-22 23:13:37 +00:00
|
|
|
.\" $Id: pthread_rwlockattr_getpshared.3,v 1.2 1999/03/05 18:43:00 bde Exp $
|
1998-09-07 19:01:43 +00:00
|
|
|
.\"
|
1999-03-22 23:13:37 +00:00
|
|
|
.Dd March 22, 1999
|
1998-09-07 19:01:43 +00:00
|
|
|
.Dt PTHREAD_RWLOCKATTR_GETPSHARED 3
|
|
|
|
|
.Os
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm pthread_rwlockattr_getpshared
|
1999-03-22 23:13:37 +00:00
|
|
|
.Nd get the process shared attribute
|
1998-09-07 19:01:43 +00:00
|
|
|
.Sh SYNOPSIS
|
|
|
|
|
.Fd #include <pthread.h>
|
|
|
|
|
.Ft int
|
1999-03-05 18:43:00 +00:00
|
|
|
.Fn pthread_rwlockattr_getpshared "const pthread_rwlockattr_t *attr" "int *pshared"
|
1998-09-07 19:01:43 +00:00
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
The
|
|
|
|
|
.Fn pthread_rwlockattr_getpshared
|
|
|
|
|
function is used to get the process shared setting of a read/write
|
|
|
|
|
lock attribute object. The setting is returned via
|
|
|
|
|
.Fa pshared ,
|
|
|
|
|
and may be one of two values:
|
|
|
|
|
.Bl -hang -offset flag -width 123456789012345678901234
|
|
|
|
|
.It Ar PTHREAD_PROCESS_SHARED
|
|
|
|
|
Any thread of any process that has access to the memory where the
|
|
|
|
|
read/write lock resides can manipulate the lock.
|
|
|
|
|
.It Ar PTHREAD_PROCESS_PRIVATE
|
|
|
|
|
Only threads created within the same process as the thread that
|
|
|
|
|
initialized the read/write lock can manipulate the lock. This is
|
|
|
|
|
the default value.
|
|
|
|
|
.El
|
|
|
|
|
.Sh RETURN VALUES
|
|
|
|
|
If successful, the
|
|
|
|
|
.Fn pthread_rwlockattr_getpshared
|
|
|
|
|
function will return zero. Otherwise an error number will be returned
|
|
|
|
|
to indicate the error.
|
|
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr pthread_rwlock_init 3 ,
|
|
|
|
|
.Xr pthread_rwlockattr_init 3 ,
|
|
|
|
|
.Xr pthread_rwlockattr_setpshared 3
|
|
|
|
|
.Sh STANDARDS
|
|
|
|
|
The
|
|
|
|
|
.Fn pthread_rwlockattr_getpshared
|
|
|
|
|
function is expected to conform to
|
|
|
|
|
.St -susv2 .
|
|
|
|
|
.Sh ERRORS
|
|
|
|
|
.Fn pthread_rwlockattr_getpshared
|
|
|
|
|
may fail if:
|
|
|
|
|
.Bl -tag -width Er
|
|
|
|
|
.It Bq Er EINVAL
|
|
|
|
|
The value specified by
|
|
|
|
|
.Fa attr
|
|
|
|
|
is invalid.
|
|
|
|
|
.El
|
|
|
|
|
.Sh HISTORY
|
|
|
|
|
The
|
|
|
|
|
.Fn pthread_rwlockattr_getpshared
|
|
|
|
|
function first appeared in
|
|
|
|
|
.Fx 3.0 .
|
