View file File name : time.h Content :/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef _LINUX_TIME_H #define _LINUX_TIME_H #include <linux/types.h> #include <linux/time_types.h> #ifndef _STRUCT_TIMESPEC #define _STRUCT_TIMESPEC struct timespec { __kernel_time_t tv_sec; /* seconds */ long tv_nsec; /* nanoseconds */ }; #endif struct timeval { __kernel_time_t tv_sec; /* seconds */ __kernel_suseconds_t tv_usec; /* microseconds */ }; struct timezone { int tz_minuteswest; /* minutes west of Greenwich */ int tz_dsttime; /* type of dst correction */ }; /* * Names of the interval timers, and structure * defining a timer setting: */ #define ITIMER_REAL 0 #define ITIMER_VIRTUAL 1 #define ITIMER_PROF 2 struct itimerspec { struct timespec it_interval; /* timer period */ struct timespec it_value; /* timer expiration */ }; struct itimerval { struct timeval it_interval; /* timer interval */ struct timeval it_value; /* current value */ }; /* * The IDs of the various system clocks (for POSIX.1b interval timers): */ #define CLOCK_REALTIME 0 #define CLOCK_MONOTONIC 1 #define CLOCK_PROCESS_CPUTIME_ID 2 #define CLOCK_THREAD_CPUTIME_ID 3 #define CLOCK_MONOTONIC_RAW 4 #define CLOCK_REALTIME_COARSE 5 #define CLOCK_MONOTONIC_COARSE 6 #define CLOCK_BOOTTIME 7 #define CLOCK_REALTIME_ALARM 8 #define CLOCK_BOOTTIME_ALARM 9 /* * The driver implementing this got removed. The clock ID is kept as a * place holder. Do not reuse! */ #define CLOCK_SGI_CYCLE 10 #define CLOCK_TAI 11 #define MAX_CLOCKS 16 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC) #define CLOCKS_MONO CLOCK_MONOTONIC /* * The various flags for setting POSIX.1b interval timers: */ #define TIMER_ABSTIME 0x01 #endif /* _LINUX_TIME_H */