# Module BatteriesThread.RMutex

    module RMutex: BatRMutex

    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 will suspend until the other mutex is unlocked.

Note attempting to lock a mutex you already have locked from the same thread will not suspend your thread.

    val try_lock : t -> bool

Same as `RMutex.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. If the mutex wasn't locked, nothing happens.

    val synchronize : ?lock:t -> ('a -> 'b) -> 'a -> 'b

Protect a function.

`synchronize f` returns a new function `f'` with the same behavior as `f` but such that concurrenty calls to `f'` are queued if necessary to avoid races.

`synchronize ~lock:l f` behaves as `synchronize f` but uses a user-specified lock `l`, which may be useful to share a lock between several function.

In either case, the lock is acquired when entering the function and released when the function call ends, whether this is due to normal termination or to some exception being raised.

    val make : unit -> BatConcurrent.lock

Create a new abstract lock based on Reentrant Mutexes.