# Class type Netsys_oothr.mutex

    class type mutex = object .. end

    method lock : unit -> unit

In a multi-threaded program: Suspends the calling thread until the mutex is locked. In a single-threaded program: This is a no-op

    method unlock : unit -> unit

In a multi-threaded program: Unlocks a mutex. In a single-threaded program: This is a no-op

    method try_lock : unit -> bool

In a multi-threaded program: Tries to immediately lock the mutex, and returns whether the lock could be obtained. In a single-threaded program: returns `true`

    method repr : exn

May be used internally be the implementation