rtapi_delay — Busy-loop for short delays
void rtapi_delay ( long int nsec )
long int rtapi_delay_max()
The desired delay length in nanoseconds
rtapi_delay is a simple delay.
t is intended only for short delays, since it simply loops, wasting CPU cycles.
rtapi_delay_max returns the max delay permitted (usually
approximately 1/4 of the clock period).
Any call to rtapi_delay requesting a delay longer than the max will delay for the max time only.
rtapi_delay_max should be called before using rtapi_delay to
make sure the required delays can be achieved.
The actual resolution of the delay may be as good as one nano-second, or as bad as a several microseconds.
May be called from init/cleanup code, and from within realtime tasks.
rtapi_delay_max returns the maximum delay permitted.