1#ifndef _UAPI_LINUX_TIME_H 2#define _UAPI_LINUX_TIME_H 3 4#include <linux/types.h> 5 6 7#ifndef _STRUCT_TIMESPEC 8#define _STRUCT_TIMESPEC 9struct timespec { 10 __kernel_time_t tv_sec; /* seconds */ 11 long tv_nsec; /* nanoseconds */ 12}; 13#endif 14 15struct timeval { 16 __kernel_time_t tv_sec; /* seconds */ 17 __kernel_suseconds_t tv_usec; /* microseconds */ 18}; 19 20struct timezone { 21 int tz_minuteswest; /* minutes west of Greenwich */ 22 int tz_dsttime; /* type of dst correction */ 23}; 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#define CLOCK_SGI_CYCLE 10 /* Hardware specific */ 58#define CLOCK_TAI 11 59 60#define MAX_CLOCKS 16 61#define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC) 62#define CLOCKS_MONO CLOCK_MONOTONIC 63 64/* 65 * The various flags for setting POSIX.1b interval timers: 66 */ 67#define TIMER_ABSTIME 0x01 68 69#endif /* _UAPI_LINUX_TIME_H */ 70