1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _UAPI_LINUX_TIME_H
3 #define _UAPI_LINUX_TIME_H
4 
5 #include <linux/types.h>
6 #include <linux/time_types.h>
7 
8 #ifndef __KERNEL__
9 #ifndef _STRUCT_TIMESPEC
10 #define _STRUCT_TIMESPEC
11 struct timespec {
12 	__kernel_old_time_t	tv_sec;		/* seconds */
13 	long			tv_nsec;	/* nanoseconds */
14 };
15 #endif
16 
17 struct timeval {
18 	__kernel_old_time_t	tv_sec;		/* seconds */
19 	__kernel_suseconds_t	tv_usec;	/* microseconds */
20 };
21 
22 struct itimerspec {
23 	struct timespec it_interval;/* timer period */
24 	struct timespec it_value;	/* timer expiration */
25 };
26 
27 struct itimerval {
28 	struct timeval it_interval;/* timer interval */
29 	struct timeval it_value;	/* current value */
30 };
31 #endif
32 
33 struct timezone {
34 	int	tz_minuteswest;	/* minutes west of Greenwich */
35 	int	tz_dsttime;	/* type of dst correction */
36 };
37 
38 /*
39  * Names of the interval timers, and structure
40  * defining a timer setting:
41  */
42 #define	ITIMER_REAL		0
43 #define	ITIMER_VIRTUAL		1
44 #define	ITIMER_PROF		2
45 
46 /*
47  * The IDs of the various system clocks (for POSIX.1b interval timers):
48  */
49 #define CLOCK_REALTIME			0
50 #define CLOCK_MONOTONIC			1
51 #define CLOCK_PROCESS_CPUTIME_ID	2
52 #define CLOCK_THREAD_CPUTIME_ID		3
53 #define CLOCK_MONOTONIC_RAW		4
54 #define CLOCK_REALTIME_COARSE		5
55 #define CLOCK_MONOTONIC_COARSE		6
56 #define CLOCK_BOOTTIME			7
57 #define CLOCK_REALTIME_ALARM		8
58 #define CLOCK_BOOTTIME_ALARM		9
59 /*
60  * The driver implementing this got removed. The clock ID is kept as a
61  * place holder. Do not reuse!
62  */
63 #define CLOCK_SGI_CYCLE			10
64 #define CLOCK_TAI			11
65 
66 #define MAX_CLOCKS			16
67 #define CLOCKS_MASK			(CLOCK_REALTIME | CLOCK_MONOTONIC)
68 #define CLOCKS_MONO			CLOCK_MONOTONIC
69 
70 /*
71  * The various flags for setting POSIX.1b interval timers:
72  */
73 #define TIMER_ABSTIME			0x01
74 
75 #endif /* _UAPI_LINUX_TIME_H */
76