got3nks 44efecda41 Use a per-descriptor wrapper in wxEpollDispatcher instead of a map ...

Dispatch() resolves the handler through a map keyed by the descriptor
stored in epoll_event::data, which means taking a lock for every event
dispatched, on the thread running the event loop.

Point epoll_event::data.ptr at a small dispatcher-owned entry holding the
handler instead. Unregistering clears the handler in the entry rather than
freeing it, since a batch being dispatched may still point at one, so the
entries live as long as the dispatcher and are indexed by descriptor.

Dispatch() then reaches the handler through the pointer epoll_wait() gave
back and never looks at the container at all, so it takes no lock. The lock
that remains guards only the growth of the vector, from registrations made
on worker threads.

This also makes the RegisterFD()/ModifyFD() disagreement noted in the map
version a non-issue: an entry is created on demand by either path.

No behaviour change, and the test added with the map version passes
unchanged.

Closes #26930.

2026-08-26 22:59:04 +02:00

..

msvc/wx

Use "vc145" versioned suffix for MSVS 2026 compiler

2026-03-04 19:47:39 +01:00

wx

Use a per-descriptor wrapper in wxEpollDispatcher instead of a map

2026-08-26 22:59:04 +02:00