rtapi_delay − Busy-loop for short delays
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void rtapi_delay(long int nsec) |
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void rtapi_delay_max() |
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nsec |
The desired delay length in nanoseconds |
rtapi_delay is a simple delay. It 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.
rtapi_clock_set_period(3rtapi)