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 _STRUCT_TIMESPEC 9#define _STRUCT_TIMESPEC 10struct timespec { 11 __kernel_old_time_t tv_sec; /* seconds */ 12 long tv_nsec; /* nanoseconds */ 13}; 14#endif 15 16struct timeval { 17 __kernel_old_time_t tv_sec; /* seconds */ 18 __kernel_suseconds_t tv_usec; /* microseconds */ 19}; 20 21struct timezone { 22 int tz_minuteswest; /* minutes west of Greenwich */ 23 int tz_dsttime; /* type of dst correction */ 24}; 25 26/* 27 * Names of the interval timers, and structure 28 * defining a timer setting: 29 */ 30#define ITIMER_REAL 0 31#define ITIMER_VIRTUAL 1 32#define ITIMER_PROF 2 33 34struct itimerspec { 35 struct timespec it_interval; /* timer period */ 36 struct timespec it_value; /* timer expiration */ 37}; 38 39struct itimerval { 40 struct timeval it_interval; /* timer interval */ 41 struct timeval it_value; /* current value */ 42}; 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 /* _UAPI_LINUX_TIME_H */ 74