Nanoev_picos.Global_evGlobal loop.
val with_lock : Stdlib.Mutex.t -> (unit -> 'a) -> 'aval bg_thread_ : active:bool Stdlib.Atomic.t -> evloop:Nanoev.t -> unit -> unitval get_nanoev : unit -> Nanoev.t optionval get_nanoev_exn : unit -> Nanoev.tval setup_bg_thread : Nanoev.t -> unit