sbttots9
Q32.32 fixed point representation of time
Part of bttosbt(9).
Usage
typedef __int64_t
__sbintime_t;
typedef
__sbintime_t
sbintime_t;
int
sbintime_t
struct bintime
int64_t
sbintime_t
int64_t
sbintime_t
int64_t
sbintime_t
struct timespec
sbintime_t
struct timeval
sbintime_t
Overview
The sbintime_t type is a Q32.32 fixed point representation of time. The high 32-bit integral bits specify the number of seconds, and the low 32-bit fractional bits specify the sub-second portion. Since the lower 32 bits are counting with a base unit of 1/2^32 seconds, ‘(sbintime_t)0x1’ is just under 250 picoseconds.
All of the conversion functions are designed to do the conversion without large truncation errors that are possible with naive math.
sbintime_getsec(sbt)-
Return the whole number of seconds from a sbintime_t specified by the sbt argument.
bttosbt(bt)-
Convert a struct bintime specified by the bt argument to a sbintime_t.
sbttobt(sbt)-
Convert a sbintime_t specified by the sbt argument to a struct bintime.
sbttons(sbt)-
Convert a sbintime_t specified by the sbt argument to the number of nanoseconds.
nstosbt(ns)-
Convert the number of nanoseconds specified by the ns argument to a sbintime_t.
sbttous(sbt)-
Convert a sbintime_t specified by the sbt argument to the number of microseconds.
ustosbt(us)-
Convert the number of microseconds specified by the us argument to a sbintime_t.
sbttoms(sbt)-
Convert a sbintime_t specified by the sbt argument to the number of milliseconds.
mstosbt(ms)-
Convert the number of milliseconds specified by the ms argument to a sbintime_t.
sbttots(sbt)-
Convert a sbintime_t specified by the sbt argument to a struct timespec.
tstosbt(ts)-
Convert a struct timespec specified by the ts argument to a sbintime_t.
sbttotv(sbt)-
Convert a sbintime_t specified by the sbt argument to a struct timeval.
tvtosbt(tv)-
Convert a struct timeval specified by the tv argument to a sbintime_t.