[Tarantool-patches] [PATCH] coio: handle spurious wakeup correctly

Vladislav Shpilevoy v.shpilevoy at tarantool.org
Wed Nov 17 01:49:59 MSK 2021

Hi! Thanks for the patch!

On 16.11.2021 11:17, Serge Petrenko via Tarantool-patches wrote:
> coio_accept, coio_read, coio_write, coio_writev used to handle spurious
> wakeups correctly: if the timeout hasn't passed yet, they would simply
> retry reading (or writing) and fall asleep once again if no data is
> ready.
> This behaviour changed in the following patches:
> 577a640a7fdec986d19101ed04d2afa80e951c78 ("coio: pass fd to
> coio_accept") and 4f84859dcdd6126b0bdcda810b7f5f58386bdac6 ("Introduce
> iostream wrapper for socket I/O").
> Now the functions timeout on the very first spurious wakeup.
> Fix this, add the appropriate unit tests and a test_iostream
> implementation for the ease of testing.

Don't we have the same problem with coio_connect_addr() (used in

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