# Module Mutex

    module Mutex: sig .. end

Locks for mutual exclusion.

Mutexes (mutual-exclusion locks) are used to implement critical sections and protect shared mutable data structures against concurrent accesses. The typical use is (if `m` is the mutex associated with the data structure `D`):

         Mutex.lock m;
         (* Critical section that operates over D *);
         Mutex.unlock m

    type t

The type of mutexes.

    val create : unit -> t

Return a new mutex.

    val lock : t -> unit

Lock the given mutex. Only one thread can have the mutex locked at any time. A thread that attempts to lock a mutex already locked by another thread will suspend until the other thread unlocks the mutex.

    val try_lock : t -> bool

Same as `Mutex.lock`, but does not suspend the calling thread if the mutex is already locked: just return `false` immediately in that case. If the mutex is unlocked, lock it and return `true`.

    val unlock : t -> unit

Unlock the given mutex. Other threads suspended trying to lock the mutex will restart.