My first thought was to store an oneshot channel sender in the struct and fire it within the Drop impl. This works fine, but then I realized that it doesn't need to be fired, as it will throw an error on the receiver side anyway if dropped. So I chose Channel<Infallible>, but this feels a bit hacky. Are you aware of any other solutions?
You could store Arc<AtomicBool> inside the structure to transmit a single bit of information like that.
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Using a channel like that seems fine. If you need the other side to be able to wait for the event, it is going to require a bit of locking and thread management, which I expect to look 99% like a oneshot channel implementation anyway.
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