linux-headers (unknown)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _LINUX_TIME_H
3 #define _LINUX_TIME_H
4
5 #include <linux/types.h>
6 #include <linux/time_types.h>
7
8 #ifndef _STRUCT_TIMESPEC
9 #define _STRUCT_TIMESPEC
10 struct timespec {
11 __kernel_old_time_t tv_sec; /* seconds */
12 long tv_nsec; /* nanoseconds */
13 };
14 #endif
15
16 struct timeval {
17 __kernel_old_time_t tv_sec; /* seconds */
18 __kernel_suseconds_t tv_usec; /* microseconds */
19 };
20
21 struct itimerspec {
22 struct timespec it_interval;/* timer period */
23 struct timespec it_value; /* timer expiration */
24 };
25
26 struct itimerval {
27 struct timeval it_interval;/* timer interval */
28 struct timeval it_value; /* current value */
29 };
30
31 struct timezone {
32 int tz_minuteswest; /* minutes west of Greenwich */
33 int tz_dsttime; /* type of dst correction */
34 };
35
36 /*
37 * Names of the interval timers, and structure
38 * defining a timer setting:
39 */
40 #define ITIMER_REAL 0
41 #define ITIMER_VIRTUAL 1
42 #define ITIMER_PROF 2
43
44 /*
45 * The IDs of the various system clocks (for POSIX.1b interval timers):
46 */
47 #define CLOCK_REALTIME 0
48 #define CLOCK_MONOTONIC 1
49 #define CLOCK_PROCESS_CPUTIME_ID 2
50 #define CLOCK_THREAD_CPUTIME_ID 3
51 #define CLOCK_MONOTONIC_RAW 4
52 #define CLOCK_REALTIME_COARSE 5
53 #define CLOCK_MONOTONIC_COARSE 6
54 #define CLOCK_BOOTTIME 7
55 #define CLOCK_REALTIME_ALARM 8
56 #define CLOCK_BOOTTIME_ALARM 9
57 /*
58 * The driver implementing this got removed. The clock ID is kept as a
59 * place holder. Do not reuse!
60 */
61 #define CLOCK_SGI_CYCLE 10
62 #define CLOCK_TAI 11
63
64 #define MAX_CLOCKS 16
65 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
66 #define CLOCKS_MONO CLOCK_MONOTONIC
67
68 /*
69 * The various flags for setting POSIX.1b interval timers:
70 */
71 #define TIMER_ABSTIME 0x01
72
73 #endif /* _LINUX_TIME_H */
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