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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * @OSF_COPYRIGHT@
24: */
25: /*
26: * HISTORY
27: *
28: * Revision 1.1.1.1 1998/09/22 21:05:31 wsanchez
29: * Import of Mac OS X kernel (~semeria)
30: *
31: * Revision 1.1.1.1 1998/03/07 02:25:46 wsanchez
32: * Import of OSF Mach kernel (~mburg)
33: *
34: * Revision 1.2.11.2 1995/01/06 19:52:17 devrcs
35: * mk6 CR668 - 1.3b26 merge
36: * 64bit cleanup
37: * [1994/10/14 03:43:25 dwm]
38: *
39: * Revision 1.2.11.1 1994/09/23 02:43:49 ezf
40: * change marker to not FREE
41: * [1994/09/22 21:43:27 ezf]
42: *
43: * Revision 1.2.3.2 1993/06/09 02:44:03 gm
44: * Added to OSF/1 R1.3 from NMK15.0.
45: * [1993/06/02 21:18:38 jeffc]
46: *
47: * Revision 1.2 1993/04/19 16:40:14 devrcs
48: * ansi C conformance changes
49: * [1993/02/02 18:55:30 david]
50: *
51: * Revision 1.1 1992/09/30 02:32:21 robert
52: * Initial revision
53: *
54: * $EndLog$
55: */
56: /* CMU_HIST */
57: /*
58: * Revision 2.4 91/05/18 14:35:13 rpd
59: * Added mapped_time_value_t.
60: * [91/03/21 rpd]
61: *
62: * Revision 2.3 91/05/14 17:01:40 mrt
63: * Correcting copyright
64: *
65: * Revision 2.2 91/02/05 17:36:49 mrt
66: * Changed to new Mach copyright
67: * [91/02/01 17:22:07 mrt]
68: *
69: * Revision 2.1 89/08/03 16:06:24 rwd
70: * Created.
71: *
72: * Revision 2.4 89/02/25 18:41:34 gm0w
73: * Changes for cleanup.
74: *
75: * Revision 2.3 89/02/07 00:53:58 mwyoung
76: * Relocated from sys/time_value.h
77: *
78: * Revision 2.2 89/01/31 01:21:58 rpd
79: * TIME_MICROS_MAX should be 1 Million, not 10 Million.
80: * [88/10/12 dlb]
81: *
82: * 4-Jan-88 David Golub (dbg) at Carnegie-Mellon University
83: * Created.
84: *
85: */
86: /* CMU_ENDHIST */
87: /*
88: * Mach Operating System
89: * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
90: * All Rights Reserved.
91: *
92: * Permission to use, copy, modify and distribute this software and its
93: * documentation is hereby granted, provided that both the copyright
94: * notice and this permission notice appear in all copies of the
95: * software, derivative works or modified versions, and any portions
96: * thereof, and that both notices appear in supporting documentation.
97: *
98: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
99: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
100: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
101: *
102: * Carnegie Mellon requests users of this software to return to
103: *
104: * Software Distribution Coordinator or [email protected]
105: * School of Computer Science
106: * Carnegie Mellon University
107: * Pittsburgh PA 15213-3890
108: *
109: * any improvements or extensions that they make and grant Carnegie Mellon
110: * the rights to redistribute these changes.
111: */
112: /*
113: */
114:
115: #ifndef TIME_VALUE_H_
116: #define TIME_VALUE_H_
117:
118: #include <mach/machine/vm_types.h>
119:
120: /*
121: * Time value returned by kernel.
122: */
123:
124: struct time_value {
125: integer_t seconds;
126: integer_t microseconds;
127: };
128: typedef struct time_value time_value_t;
129:
130: /*
131: * Macros to manipulate time values. Assume that time values
132: * are normalized (microseconds <= 999999).
133: */
134: #define TIME_MICROS_MAX (1000000)
135:
136: #define time_value_add_usec(val, micros) { \
137: if (((val)->microseconds += (micros)) \
138: >= TIME_MICROS_MAX) { \
139: (val)->microseconds -= TIME_MICROS_MAX; \
140: (val)->seconds++; \
141: } \
142: }
143:
144: #define time_value_add(result, addend) { \
145: (result)->microseconds += (addend)->microseconds; \
146: (result)->seconds += (addend)->seconds; \
147: if ((result)->microseconds >= TIME_MICROS_MAX) { \
148: (result)->microseconds -= TIME_MICROS_MAX; \
149: (result)->seconds++; \
150: } \
151: }
152:
153: /*
154: * Time value available through the mapped-time interface.
155: * Read this mapped value with
156: * do {
157: * secs = mtime->seconds;
158: * usecs = mtime->microseconds;
159: * } while (secs != mtime->check_seconds);
160: */
161:
162: typedef struct mapped_time_value {
163: integer_t seconds;
164: integer_t microseconds;
165: integer_t check_seconds;
166: } mapped_time_value_t;
167:
168: #endif /* TIME_VALUE_H_ */
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