1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _UAPI_LINUX_TIME_H
3 #define _UAPI_LINUX_TIME_H
5 #include <linux/types.h>
6 #include <linux/time_types.h>
8 #ifndef _STRUCT_TIMESPEC
9 #define _STRUCT_TIMESPEC
11 __kernel_time_t tv_sec; /* seconds */
12 long tv_nsec; /* nanoseconds */
17 __kernel_time_t tv_sec; /* seconds */
18 __kernel_suseconds_t tv_usec; /* microseconds */
22 int tz_minuteswest; /* minutes west of Greenwich */
23 int tz_dsttime; /* type of dst correction */
27 * Names of the interval timers, and structure
28 * defining a timer setting:
31 #define ITIMER_VIRTUAL 1
35 struct timespec it_interval; /* timer period */
36 struct timespec it_value; /* timer expiration */
40 struct timeval it_interval; /* timer interval */
41 struct timeval it_value; /* current value */
45 * The IDs of the various system clocks (for POSIX.1b interval timers):
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
58 * The driver implementing this got removed. The clock ID is kept as a
59 * place holder. Do not reuse!
61 #define CLOCK_SGI_CYCLE 10
65 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
66 #define CLOCKS_MONO CLOCK_MONOTONIC
69 * The various flags for setting POSIX.1b interval timers:
71 #define TIMER_ABSTIME 0x01
73 #endif /* _UAPI_LINUX_TIME_H */