[PATCH v3 4/5] wal: add event_mask to wal_watcher

[Konstantin Osipov]

* Vladimir Davydov <vdavydov.dev at gmail.com> [18/10/24 16:43]:
> In order to implement WAL auto-deletion, we need a notification channel
> through which the WAL thread could notify TX that a WAL file was deleted
> so that the latter can shoot off stale replicas. We will reuse existing
> wal_watcher API for this. Currently, wal_watcher invokes the registered
> callback on each WAL write so using it as is would be inefficient. To
> avoid that, let's allow the caller to specify events of interest when
> registering a wal_watcher.

The approach with pending events is of course better than
dispatching within the callback, but it seems you're re-inventing
cbus. 
Let's discuss f2f and agree on a solution rather than you waste
time on trying to address the remarks of a stubborn reviewer.


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Konstantin Osipov, Moscow, Russia, +7 903 626 22 32
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