Method deregister

crates/openshell-vfio/src/bind.rs:295–307

Record one fewer active user of `id`. Returns the resulting process-local deregistration state.

(&mut self, id: &str)

    ///
    /// Returns the resulting process-local deregistration state.
    fn deregister(&mut self, id: &str) -> VfioIdDeregistration {
        match self.refcounts.get_mut(id) {
            Some(count) if *count > 1 => {
                *count -= 1;
                VfioIdDeregistration::StillInUse
            }
            Some(_) => {
                self.refcounts.remove(id);
                VfioIdDeregistration::LastUser
            }
            None => VfioIdDeregistration::NotTracked,
        }
    }

    fn clear(&mut self) {
        self.refcounts.clear();