X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Ftime.h;h=242f62499bb7bca6cd6c58fe134e7ffb8e97fa19;hb=9d2a3f31d6d7832cd441eeda08bc2266cdd5d972;hp=65dd85b2105e61c892120ad84cfe77ceabe42b7b;hpb=cf3c769b4b0dd1146da84d5cf045dcfe53bd0f13;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/linux/time.h b/include/linux/time.h index 65dd85b..242f624 100644 --- a/include/linux/time.h +++ b/include/linux/time.h @@ -4,20 +4,22 @@ #include #ifdef __KERNEL__ +# include # include +# include #endif #ifndef _STRUCT_TIMESPEC #define _STRUCT_TIMESPEC struct timespec { - time_t tv_sec; /* seconds */ - long tv_nsec; /* nanoseconds */ + __kernel_time_t tv_sec; /* seconds */ + long tv_nsec; /* nanoseconds */ }; #endif struct timeval { - time_t tv_sec; /* seconds */ - suseconds_t tv_usec; /* microseconds */ + __kernel_time_t tv_sec; /* seconds */ + __kernel_suseconds_t tv_usec; /* microseconds */ }; struct timezone { @@ -27,13 +29,21 @@ struct timezone { #ifdef __KERNEL__ -/* Parameters used to convert the timespec values: */ -#define MSEC_PER_SEC 1000L -#define USEC_PER_SEC 1000000L -#define NSEC_PER_SEC 1000000000L -#define NSEC_PER_USEC 1000L +extern struct timezone sys_tz; -static inline int timespec_equal(struct timespec *a, struct timespec *b) +/* 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); } @@ -43,7 +53,7 @@ static inline int timespec_equal(struct timespec *a, struct timespec *b) * lhs == rhs: return 0 * lhs > rhs: return >0 */ -static inline int timespec_compare(struct timespec *lhs, struct timespec *rhs) +static inline int timespec_compare(const struct timespec *lhs, const struct timespec *rhs) { if (lhs->tv_sec < rhs->tv_sec) return -1; @@ -52,7 +62,7 @@ static inline int timespec_compare(struct timespec *lhs, struct timespec *rhs) return lhs->tv_nsec - rhs->tv_nsec; } -static inline int timeval_compare(struct timeval *lhs, struct timeval *rhs) +static inline int timeval_compare(const struct timeval *lhs, const struct timeval *rhs) { if (lhs->tv_sec < rhs->tv_sec) return -1; @@ -66,6 +76,20 @@ extern unsigned long mktime(const unsigned int year, const unsigned int mon, 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: @@ -77,32 +101,40 @@ 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; -static inline unsigned long get_seconds(void) -{ - return xtime.tv_sec; -} - +unsigned long get_seconds(void); struct timespec current_kernel_time(void); #define CURRENT_TIME (current_kernel_time()) -#define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 }) +#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 timeval *times); +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_is_continuous(void); +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 @@ -149,14 +181,13 @@ 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 inline void timespec_add_ns(struct timespec *a, u64 ns) +static __always_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_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns); a->tv_nsec = ns; } #endif /* __KERNEL__ */ @@ -194,6 +225,7 @@ struct itimerval { #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: