djsundog/circuitpython
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2 Commits

Author SHA1 Message Date
Jeff Epler
36b4646516 background_callback: Avoid CALLBACK_CRITICAL_BEGIN with nothing to do 
CALLBACK_CRITICAL_BEGIN is heavyweight, but we can be confident we do
not have work to do as long as callback_head is NULL.

This gives back performance on nRF.
 2020-07-15 09:26:47 -05:00
Jeff Epler
1474fccd2f supervisor: Add a linked list of background callbacks 
In time, we should transition interrupt driven background tasks out of the
overall run_background_tasks into distinct background callbacks,
so that the number of checks that occur with each tick is reduced.
 2020-07-15 09:26:47 -05:00