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type 'a t = {
mutex: Mutex.t;
mutable content: 'a;
}
let create content : _ t = { mutex = Mutex.create (); content }
let with_ (self : _ t) f =
Mutex.lock self.mutex;
try
let x = f self.content in
Mutex.unlock self.mutex;
x
with e ->
Mutex.unlock self.mutex;
raise e
let[@inline] mutex self = self.mutex
let[@inline] update self f = with_ self (fun x -> self.content <- f x)
let[@inline] update_map l f =
with_ l (fun x ->
let x', y = f x in
l.content <- x';
y)
let get l =
Mutex.lock l.mutex;
let x = l.content in
Mutex.unlock l.mutex;
x
let set l x =
Mutex.lock l.mutex;
l.content <- x;
Mutex.unlock l.mutex