···3344 let equal (x : int) (y : int) = x = y
55 let compare (x : int) (y : int) = compare x y
66- let r = ref 0
77-88- let gen () =
99- incr r;
1010- !r
1111- ;;
1212-66+ let r = Atomic.make 1
77+ let gen () = Atomic.fetch_and_add r 1
138 let pp = Format.pp_print_int
149end
1510