.\" $OpenBSD: sched_get_priority_min.3,v 1.2 2013/06/05 03:44:50 tedu Exp $
.\"
.\" Copyright (c) 2010 Federico G. Schwindt <fgsch@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for
.\" any purpose with or without fee is hereby granted, provided that
.\" the above copyright notice and this permission notice appear in all
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.Dd $Mdocdate: June 5 2013 $
.Dt SCHED_GET_PRIORITY_MIN 3
.Os
.Sh NAME
.Nm sched_get_priority_max ,
.Nm sched_get_priority_min
.Nd get priority limits
.Sh SYNOPSIS
.In sched.h
.Ft int
.Fn sched_get_priority_max "int policy"
.Ft int
.Fn sched_get_priority_min "int policy"
.Sh DESCRIPTION
The
.Fn sched_get_priority_max
and
.Fn sched_get_priority_min
functions return the maximum and minimum priority values, respectively,
for the scheduling policy specified by
.Fa policy .
.Pp
The scheduling policy for a thread can either be
.Dv SCHED_FIFO
(first in, first out),
.Dv SCHED_RR
(round-robin) or
.Dv SCHED_OTHER .
.Sh RETURN VALUES
Upon successful completion,
.Fn sched_get_priority_max
and
.Fn sched_get_priority_min
return the maximum and minimum priority values, respectively.
Otherwise, a value of \-1 is returned and errno is set to indicate the error.
.Sh ERRORS
The
.Fn sched_get_priority_max
and
.Fn sched_get_priority_min
functions will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
Invalid value for
.Fa policy .
.El
.Sh STANDARDS
The
.Fn sched_get_priority_max
and
.Fn sched_get_priority_min
functions conform to
.St -p1003.1-2008 .
.Pp
This implementation does not support process scheduling.