.\"	$NetBSD: pthread_attr_getschedparam.3,v 1.2 2010/07/08 22:19:26 jruoho Exp $
.\"
.\" Copyright (c) 2010 Jukka Ruohonen <jruohonen@iki.fi>
.\" 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
.\"
.Dd July 7, 2010
.Dt PTHREAD_ATTR_GETSCHEDPARAM 3
.Os
.Sh NAME
.Nm pthread_attr_getschedparam
.Nd get and set scheduling attributes
.Sh LIBRARY
.Lb libpthread
.Sh SYNOPSIS
.In pthread.h
.Ft int
.Fn pthread_attr_getschedparam \
"const pthread_attr_t * restrict attr" "struct sched_param * restrict param"
.Ft int
.Fn pthread_attr_setschedparam \
"pthread_attr_t *attr" "const struct sched_param *param"
.Ft int
.Fn pthread_attr_getschedpolicy \
"const pthread_attr_t * restrict attr" "int * restrict policy"
.Ft int
.Fn pthread_attr_setschedpolicy "pthread_attr_t *attr" "int policy"
.Sh DESCRIPTION
The
.Fn pthread_attr_getschedparam
and
.Fn pthread_attr_setschedparam
functions obtain and set the scheduling parameter attribute in the
.Fa attr
object.
The
.Vt sched_param
structure is defined in
.In sched.h .
At minimum this structure contains only a single member,
.Vt sched_priority .
Refer to
.Xr pthread_schedparam 3
and
.Xr sched 3
for additional details.
.Pp
The
.Fn pthread_attr_getschedpolicy
and
.Fn pthread_attr_setschedpolicy
functions get and set the scheduling policy attribute,
.Fa policy ,
in the
.Fa attr
object.
The supported values of
.Fa policy
are the same ones listed in
.Xr pthread_schedparam 3 .
.Sh RETURN VALUES
If successful, all described functions return 0.
Otherwise, an error number is returned to indicate the error.
.Sh ERRORS
The
.Fn pthread_attr_getschedparam
function may fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
An invalid parameter was specified.
.El
.Pp
The
.Fn pthread_attr_setschedparam
function may fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
An invalid parameter was specified.
.It Bq Er ENOMEM
There was insufficient memory.
.El
.Pp
The
.Fn pthread_attr_setschedpolicy
function may fail if:
.Bl -tag -width Er
.It Bq Er ENOMEM
There was insufficient memory.
.It Bq Er ENOTSUP
An unsupported
.Fa policy
was specified.
.El
.Pp
No errors are defined for
.Fn pthread_attr_getschedpolicy .
.Sh SEE ALSO
.Xr pthread_attr 3 ,
.Xr pthread_schedparam 3 ,
.Xr sched 3
.Sh STANDARDS
These functions conform to
.St -p1003.1-2008 .