1 /*
2 * Mach Operating System
3 * Copyright (c) 1993 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
25 */
26 /*
27 * HISTORY
28 * $Log: realtime_policy.h,v $
29 * Revision 2.2 93/11/17 17:46:32 dbg
30 * Made policy_param_realtime always include start_time and
31 * start_when.
32 * [93/06/21 dbg]
33 *
34 * Now has just real-time thread attributes.
35 * [93/03/31 dbg]
36 *
37 * Removed task_attributes.
38 * [93/03/26 dbg]
39 *
40 * Included extended rt_thread attributes.
41 * [93/03/24 dbg]
42 *
43 * 64 bit cleanup.
44 * [93/02/19 dbg]
45 *
46 * Pulled together from pset_attributes.h, task_attributes.h,
47 * thread_attributes.h.
48 * [93/02/04 dbg]
49 *
50 */
51
52 /*
53 * Real-time scheduling policies and parameters.
54 */
55
56 #ifndef _MACH_REALTIME_POLICY_H_
57 #define _MACH_REALTIME_POLICY_H_
58
59 #include <mach/boolean.h>
60 #include <mach/time_spec.h>
61 #include <mach/policy.h>
62
63 #define POLICY_RATE_MONOTONIC 3
64 #define POLICY_DEADLINE_MONOTONIC 4
65 #define POLICY_EARLIEST_DEADLINE_FIRST 5
66
67 struct policy_param_realtime {
68 time_spec_t start_time;
69 natural_t start_when;
70 time_spec_t period;
71 time_spec_t deadline;
72 };
73 typedef struct policy_param_realtime policy_param_realtime_t;
74
75 #define POLICY_PARAM_REALTIME_COUNT \
76 (sizeof(struct policy_param_realtime) / sizeof(natural_t))
77
78 /*
79 * Values for start_when:
80 */
81 #define START_TIME_ABSOLUTE 0 /* start time is absolute */
82 #define START_TIME_RELATIVE 1 /* start time is relative to
83 current time */
84 #define START_TIME_NO_CHANGE 2 /* use current start time -
85 just change period and deadline */
86
87 #endif /* _MACH_REALTIME_POLICY_H_ */
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