include/uapi/linux/time.h

   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
   9 struct timespec {
  10         __kernel_time_t tv_sec;                 /* seconds */
  11         long            tv_nsec;                /* nanoseconds */
  12 };
  13 #endif
  14
  15 struct timeval {
  16         __kernel_time_t         tv_sec;         /* seconds */
  17         __kernel_suseconds_t    tv_usec;        /* microseconds */
  18 };
  19
  20 struct 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
  34 struct itimerspec {
  35         struct timespec it_interval;    /* timer period */
  36         struct timespec it_value;       /* timer expiration */
  37 };
  38
  39 struct 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 */