/* [<][>][^][v][top][bottom][index][help] */
1 /*
2 * Copyright (c) 2004, 2008
3 * The President and Fellows of Harvard College.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef _KERN_TIME_H_
31 #define _KERN_TIME_H_
32
33 /*
34 * Time-related definitions, for <sys/time.h> and others.
35 */
36
37
38 /*
39 * Time with fractional seconds. Important. Unfortunately, to be
40 * compatible, we need both timeval and timespec.
41 */
42
43 struct timeval {
44 __time_t tv_sec; /* seconds */
45 __i32 tv_usec; /* microseconds */
46 };
47
48 struct timespec {
49 __time_t tv_sec; /* seconds */
50 __i32 tv_nsec; /* nanoseconds */
51 };
52
53
54 /*
55 * Bits for interval timers. Obscure and not really that important.
56 */
57
58 /* codes for the various timers */
59 #define ITIMER_REAL 0 /* Real (wall-clock) time. */
60 #define ITIMER_VIRTUAL 1 /* Virtual (when process is executing) time. */
61 #define ITIMER_PROF 2 /* For execution profiling. */
62
63 /* structure for setitimer/getitimer */
64 struct itimerval {
65 struct timeval it_interval; /* Time to reload after expiry. */
66 struct timeval it_value; /* Time to count. */
67 };
68
69
70 #endif /* _KERN_TIME_H_ */