1.\" $OpenBSD: sched_get_priority_min.3,v 1.2 2013/06/05 03:44:50 tedu Exp $
2.\"
3.\" Copyright (c) 2010 Federico G. Schwindt <fgsch@openbsd.org>
4.\"
5.\" Permission to use, copy, modify, and distribute this software for
6.\" any purpose with or without fee is hereby granted, provided that
7.\" the above copyright notice and this permission notice appear in all
8.\" copies.
9.\"
10.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
11.\" WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
12.\" WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
13.\" AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
14.\" DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
15.\" OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
16.\" TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17.\" PERFORMANCE OF THIS SOFTWARE.
18.\"
19.Dd $Mdocdate: June 5 2013 $
20.Dt SCHED_GET_PRIORITY_MIN 3
21.Os
22.Sh NAME
23.Nm sched_get_priority_max ,
24.Nm sched_get_priority_min
25.Nd get priority limits
26.Sh SYNOPSIS
27.In sched.h
28.Ft int
29.Fn sched_get_priority_max "int policy"
30.Ft int
31.Fn sched_get_priority_min "int policy"
32.Sh DESCRIPTION
33The
34.Fn sched_get_priority_max
35and
36.Fn sched_get_priority_min
37functions return the maximum and minimum priority values, respectively,
38for the scheduling policy specified by
39.Fa policy .
40.Pp
41The scheduling policy for a thread can either be
42.Dv SCHED_FIFO
43(first in, first out),
44.Dv SCHED_RR
45(round-robin) or
46.Dv SCHED_OTHER .
47.Sh RETURN VALUES
48Upon successful completion,
49.Fn sched_get_priority_max
50and
51.Fn sched_get_priority_min
52return the maximum and minimum priority values, respectively.
53Otherwise, a value of \-1 is returned and errno is set to indicate the error.
54.Sh ERRORS
55The
56.Fn sched_get_priority_max
57and
58.Fn sched_get_priority_min
59functions will fail if:
60.Bl -tag -width Er
61.It Bq Er EINVAL
62Invalid value for
63.Fa policy .
64.El
65.Sh STANDARDS
66The
67.Fn sched_get_priority_max
68and
69.Fn sched_get_priority_min
70functions conform to
71.St -p1003.1-2008 .
72.Pp
73This implementation does not support process scheduling.
74