| #ifndef _LINUX_TIME_H |
| #define _LINUX_TIME_H |
| |
| #include <linux/types.h> |
| |
| #ifdef __KERNEL__ |
| # include <linux/seqlock.h> |
| #endif |
| |
| #ifndef _STRUCT_TIMESPEC |
| #define _STRUCT_TIMESPEC |
| struct timespec { |
| time_t tv_sec; /* seconds */ |
| long tv_nsec; /* nanoseconds */ |
| }; |
| #endif |
| |
| struct timeval { |
| time_t tv_sec; /* seconds */ |
| suseconds_t tv_usec; /* microseconds */ |
| }; |
| |
| struct timezone { |
| int tz_minuteswest; /* minutes west of Greenwich */ |
| int tz_dsttime; /* type of dst correction */ |
| }; |
| |
| #ifdef __KERNEL__ |
| |
| /* 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 |
| |
| static inline int timespec_equal(struct timespec *a, 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); |
| |
| /* |
| * 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 __attribute__((weak)); |
| |
| void timekeeping_init(void); |
| |
| static inline unsigned long get_seconds(void) |
| { |
| return xtime.tv_sec; |
| } |
| |
| struct timespec current_kernel_time(void); |
| |
| #define CURRENT_TIME (current_kernel_time()) |
| #define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 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 timeval *times); |
| 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 struct timespec timespec_trunc(struct timespec t, unsigned gran); |
| extern int timekeeping_is_continuous(void); |
| |
| /** |
| * 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 |
| */ |
| static inline void timespec_add_ns(struct timespec *a, u64 ns) |
| { |
| ns += a->tv_nsec; |
| while(unlikely(ns >= NSEC_PER_SEC)) { |
| ns -= NSEC_PER_SEC; |
| a->tv_sec++; |
| } |
| 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 |
| |
| /* |
| * 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 |