The
binuptime()
and
getbinuptime()
functions store the time elapsed since boot as a
struct bintime
at the address specified by
bt.
The
microuptime()
and
getmicrouptime()
functions perform the same utility, but record the elapsed time as a
struct timeval
instead.
Similarly the
nanouptime()
and
getnanouptime()
functions store the elapsed time as a
struct timespec.
The
sbinuptime()
and
getsbinuptime()
functions return the time elapsed since boot as a
sbintime_t.
The
binuptime(),
microuptime(),
nanouptime(),
and
sbinuptime()
functions
always query the timecounter to return the current time as precisely as
possible.
Whereas
getbinuptime(),
getmicrouptime(),
getnanouptime(),
and
getsbinuptime()
functions are abstractions which return a less precise, but
faster to obtain, time.
The intent of the
getbinuptime(),
getmicrouptime(),
getnanouptime(),
and
getsbinuptime()
functions is to enforce the user's preference for timer accuracy versus
execution time.
