#ifndef _LINUX_TIME_H #define _LINUX_TIME_H #include <linux/types.h> #ifdef __KERNEL__ # include <linux/cache.h> # include <linux/seqlock.h> # include <linux/math64.h> #endif #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 */ }; #ifdef __KERNEL__ extern struct timezone sys_tz; /* Parameters used to convert the timespec values: */ #define MSEC_PER_SEC 1000L #define USEC_PER_MSEC 1000L #define NSEC_PER_USEC 1000L #define NSEC_PER_MSEC 1000000L #define USEC_PER_SEC 1000000L #define NSEC_PER_SEC 1000000000L #define FSEC_PER_SEC 1000000000000000L #define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1) static inline int timespec_equal(const struct timespec *a, const struct timespec *b) { return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec); } /* * lhs < rhs: return <0 * lhs == rhs: return 0 * lhs > rhs: return >0 */ static inline int timespec_compare(const struct timespec *lhs, const struct timespec *rhs) { if (lhs->tv_sec < rhs->tv_sec) return -1; if (lhs->tv_sec > rhs->tv_sec) return 1; return lhs->tv_nsec - rhs->tv_nsec; } static inline int timeval_compare(const struct timeval *lhs, const struct timeval *rhs) { if (lhs->tv_sec < rhs->tv_sec) return -1; if (lhs->tv_sec > rhs->tv_sec) return 1; return lhs->tv_usec - rhs->tv_usec; } extern unsigned long mktime(const unsigned int year, const unsigned int mon, const unsigned int day, const unsigned int hour, const unsigned int min, const unsigned int sec); extern void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec); extern struct timespec timespec_add_safe(const struct timespec lhs, const struct timespec rhs); /* * sub = lhs - rhs, in normalized form */ static inline struct timespec timespec_sub(struct timespec lhs, struct timespec rhs) { struct timespec ts_delta; set_normalized_timespec(&ts_delta, lhs.tv_sec - rhs.tv_sec, lhs.tv_nsec - rhs.tv_nsec); return ts_delta; } /* * Returns true if the timespec is norm, false if denorm: */ #define timespec_valid(ts) \ (((ts)->tv_sec >= 0) && (((unsigned long) (ts)->tv_nsec) < NSEC_PER_SEC)) extern struct timespec xtime; extern struct timespec wall_to_monotonic; extern seqlock_t xtime_lock; extern unsigned long read_persistent_clock(void); extern int update_persistent_clock(struct timespec now); extern int no_sync_cmos_clock __read_mostly; void timekeeping_init(void); extern int timekeeping_suspended; unsigned long get_seconds(void); struct timespec current_kernel_time(void); #define CURRENT_TIME (current_kernel_time()) #define CURRENT_TIME_SEC ((struct timespec) { get_seconds(), 0 }) extern void do_gettimeofday(struct timeval *tv); extern int do_settimeofday(struct timespec *tv); extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz); #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts) extern long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags); struct itimerval; extern int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue); extern unsigned int alarm_setitimer(unsigned int seconds); extern int do_getitimer(int which, struct itimerval *value); extern void getnstimeofday(struct timespec *tv); extern void getrawmonotonic(struct timespec *ts); extern void getboottime(struct timespec *ts); extern void monotonic_to_bootbased(struct timespec *ts); extern struct timespec timespec_trunc(struct timespec t, unsigned gran); extern int timekeeping_valid_for_hres(void); extern void update_wall_time(void); extern void update_xtime_cache(u64 nsec); struct tms; extern void do_sys_times(struct tms *); /** * timespec_to_ns - Convert timespec to nanoseconds * @ts: pointer to the timespec variable to be converted * * Returns the scalar nanosecond representation of the timespec * parameter. */ static inline s64 timespec_to_ns(const struct timespec *ts) { return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec; } /** * timeval_to_ns - Convert timeval to nanoseconds * @ts: pointer to the timeval variable to be converted * * Returns the scalar nanosecond representation of the timeval * parameter. */ static inline s64 timeval_to_ns(const struct timeval *tv) { return ((s64) tv->tv_sec * NSEC_PER_SEC) + tv->tv_usec * NSEC_PER_USEC; } /** * ns_to_timespec - Convert nanoseconds to timespec * @nsec: the nanoseconds value to be converted * * Returns the timespec representation of the nsec parameter. */ extern struct timespec ns_to_timespec(const s64 nsec); /** * ns_to_timeval - Convert nanoseconds to timeval * @nsec: the nanoseconds value to be converted * * Returns the timeval representation of the nsec parameter. */ extern struct timeval ns_to_timeval(const s64 nsec); /** * timespec_add_ns - Adds nanoseconds to a timespec * @a: pointer to timespec to be incremented * @ns: unsigned nanoseconds value to be added * * This must always be inlined because its used from the x86-64 vdso, * which cannot call other kernel functions. */ static __always_inline void timespec_add_ns(struct timespec *a, u64 ns) { a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns); a->tv_nsec = ns; } #endif /* __KERNEL__ */ #define NFDBITS __NFDBITS #define FD_SETSIZE __FD_SETSIZE #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp) #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp) #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp) #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp) /* * 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 /* * The IDs of various hardware clocks: */ #define CLOCK_SGI_CYCLE 10 #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