diff options
Diffstat (limited to 'sys/sys/time.h')
| -rw-r--r-- | sys/sys/time.h | 41 |
1 files changed, 35 insertions, 6 deletions
diff --git a/sys/sys/time.h b/sys/sys/time.h index 2312e08eedb5..8a661056b922 100644 --- a/sys/sys/time.h +++ b/sys/sys/time.h @@ -282,18 +282,47 @@ struct clockinfo { #ifdef _KERNEL extern time_t time_second; +/*- + * Functions for looking at our clock: [get]{bin,nano,micro}[up]time() + * + * Functions without the "get" prefix returns the best timestamp + * we can produce in the given format. + * + * "bin" == struct bintime == seconds + 64 bit fraction of seconds. + * "nano" == struct timespec == seconds + nanoseconds. + * "micro" == struct timeval == seconds + microseconds. + * + * Functions containing "up" returns time relative to boot and + * should be used for calculating time intervals. + * + * Functions without "up" returns GMT time. + * + * Functions with the "get" prefix returns a less precise result + * much faster than the functions without "get" prefix and should + * be used where a precision of 10 msec is acceptable or where + * performance is priority. (NB: "precision", _not_ "resolution" !) + * + */ + void binuptime(struct bintime *bt); +void nanouptime(struct timespec *ts); +void microuptime(struct timeval *tv); + void bintime(struct bintime *bt); -void getmicrouptime(struct timeval *tv); -void getmicrotime(struct timeval *tv); +void nanotime(struct timespec *ts); +void microtime(struct timeval *tv); + +void getbinuptime(struct bintime *bt); void getnanouptime(struct timespec *tsp); +void getmicrouptime(struct timeval *tv); + +void getbintime(struct bintime *bt); void getnanotime(struct timespec *tsp); +void getmicrotime(struct timeval *tv); + +/* other prototypes */ int itimerdecr(struct itimerval *itp, int usec); int itimerfix(struct timeval *tv); -void microuptime(struct timeval *tv); -void microtime(struct timeval *tv); -void nanouptime(struct timespec *ts); -void nanotime(struct timespec *ts); void timevaladd(struct timeval *, struct timeval *); void timevalsub(struct timeval *, struct timeval *); int tvtohz(struct timeval *); |