[lwip-devel] [bug #28775] select/event_callback: only check select_cb_list on change

[Simon Goldschmidt]

Follow-up Comment #2, bug #28775 (project lwip):

That would have been covered by the initial check (lwip_selscan() is called
before actually waiting).

If no socket is initially ready, it would indeed be necessary to add a second
lwip_selscan() between adding the new semaphore to the list and releasing
selectsem. But I guess that's OK since I'd rater improve the common case (RX
packets) instead of improving the runtime of select().

I'll prepare a patch.

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