Dropping Value in TLS

[nemosupremo]

I'm trying to figure out how to do this - my problem is I have a TLS that contains some database connections that are live for the duration of the thread. What I would like do is, when the thread is being destroyed, take the value out of TLS so I can drop it (otherwise, the value just lives forever in TLS and is never cleaned up).

The only thing that seems to work is Mutex<Option<T>>, but reaching for a Mutex here seems like overkill. RefCell/Rc doesn't work because of the Send requirement. Anything I might be overlooking here?

[nemosupremo]

Actually looks like I can get what I want with ThreadLocal<UnsafeCell<Option<T>>>.