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end_of_channel_fixes
Tyler Goodlet 2021-12-16 16:47:26 -05:00
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Repair inter-actor stream closure semantics to work correctly with
``tractor.trionics.BroadcastReceiver`` task fan out usage.
A set of previously unknown bugs discovered in `257
<https://github.com/goodboy/tractor/pull/257>`_ let graceful stream
closure result in hanging consumer tasks that use the broadcast APIs.
This adds better internal closure state tracking to the broadcast
receiver and message stream APIs and in particular ensures that when an
underlying stream/receive-channel (a broadcast receiver is receiving
from) is closed, all consumer tasks waiting on that underlying channel
are woken so they can receive the ``trio.EndOfChannel`` signal and
promptly terminate.