FreeBSD/Linux Kernel Cross Reference
sys/sys/time.h
1 /*
2 * Mach Operating System
3 * Copyright (c) 1991 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 rights
24 * to redistribute these changes.
25 */
26 /*
27 * HISTORY
28 * $Log: time.h,v $
29 * Revision 2.3 91/05/14 17:40:25 mrt
30 * Correcting copyright
31 *
32 * Revision 2.2 91/02/05 17:56:58 mrt
33 * Changed to new Mach copyright
34 * [91/02/01 17:49:29 mrt]
35 *
36 */
37 /*
38 * Time-keeper for kernel IO devices.
39 *
40 * May or may not have any relation to wall-clock time.
41 */
42
43 #ifndef _SYS_TIME_H_
44 #define _SYS_TIME_H_
45 #include <mach/time_value.h>
46
47 extern time_value_t time;
48
49 /*
50 * Definitions to keep old code happy.
51 */
52 #define timeval_t time_value_t
53 #define timeval time_value
54 #define tv_sec seconds
55 #define tv_usec microseconds
56
57 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
58 #define timercmp(tvp, uvp, cmp) \
59 ((tvp)->tv_sec cmp (uvp)->tv_sec || \
60 (tvp)->tv_sec == (uvp)->tv_sec && (tvp)->tv_usec cmp (uvp)->tv_usec)
61 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
62 #endif _SYS_TIME_H_
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