.\" $OpenBSD: sched_get_priority_min.3,v 1.1 2010/11/07 20:18:22 deraadt Exp $
.\"
.\" Copyright (c) 2010 Federico G. Schwindt <fgsch@openbsd.org>
.\"
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.Dd $Mdocdate: November 7 2010 $
.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
.Fd #include <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.