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