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LGUG2Z
d55b6daeb7
EventChannel<E> is the window-event channel that KDE and macOS each write by hand in window_manager_event_listener.rs: bounded, send is try_send and never blocks, an event that does not fit is dropped with the warning 'channel is full; dropping notification', and an optional predicate (EventChannel::coalescing) lets one coalesced event (the ResizeStep of a drag) wait at a time, released by coalesced_taken(), also when the send of the claiming event fails. The channel also records that an event was dropped (take_overflow); no tree reads it (R6 is a behaviour change, out of scope here). The flag orderings are SeqCst as in the KDE copy (macOS used AcqRel/Release; stronger on one variable, no visible difference). Nothing uses it yet. Logs use the target komorebi::transport (D29). Verified: cargo test -p komorebi-transport: 13 passed, 0 failed (5 new, the three macOS coalescing tests rewritten against the API, plus no-predicate and drop/overflow); cargo clippy -p komorebi-transport --all-targets -D warnings: clean.