1 | /* |
2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /* |
29 | * @OSF_COPYRIGHT@ |
30 | */ |
31 | /* |
32 | * Mach Operating System |
33 | * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University |
34 | * All Rights Reserved. |
35 | * |
36 | * Permission to use, copy, modify and distribute this software and its |
37 | * documentation is hereby granted, provided that both the copyright |
38 | * notice and this permission notice appear in all copies of the |
39 | * software, derivative works or modified versions, and any portions |
40 | * thereof, and that both notices appear in supporting documentation. |
41 | * |
42 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
43 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR |
44 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. |
45 | * |
46 | * Carnegie Mellon requests users of this software to return to |
47 | * |
48 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
49 | * School of Computer Science |
50 | * Carnegie Mellon University |
51 | * Pittsburgh PA 15213-3890 |
52 | * |
53 | * any improvements or extensions that they make and grant Carnegie Mellon |
54 | * the rights to redistribute these changes. |
55 | */ |
56 | |
57 | #ifndef _MACH_TIME_VALUE_H_ |
58 | #define _MACH_TIME_VALUE_H_ |
59 | |
60 | #include <mach/machine/vm_types.h> |
61 | |
62 | /* |
63 | * Time value returned by kernel. |
64 | */ |
65 | |
66 | struct time_value { |
67 | integer_t seconds; |
68 | integer_t microseconds; |
69 | }; |
70 | |
71 | typedef struct time_value time_value_t; |
72 | |
73 | /* |
74 | * Macros to manipulate time values. Assume that time values |
75 | * are normalized (microseconds <= 999999). |
76 | */ |
77 | #define TIME_MICROS_MAX (1000000) |
78 | |
79 | #define time_value_add_usec(val, micros) { \ |
80 | if (((val)->microseconds += (micros)) \ |
81 | >= TIME_MICROS_MAX) { \ |
82 | (val)->microseconds -= TIME_MICROS_MAX; \ |
83 | (val)->seconds++; \ |
84 | } \ |
85 | } |
86 | |
87 | #define time_value_add(result, addend) { \ |
88 | (result)->microseconds += (addend)->microseconds; \ |
89 | (result)->seconds += (addend)->seconds; \ |
90 | if ((result)->microseconds >= TIME_MICROS_MAX) { \ |
91 | (result)->microseconds -= TIME_MICROS_MAX; \ |
92 | (result)->seconds++; \ |
93 | } \ |
94 | } |
95 | |
96 | #endif /* _MACH_TIME_VALUE_H_ */ |
97 | |