Module Values_file.Make_2

type t
val append_value : t -> string -> int
val read_value : t -> off:int -> string
val create : fn:string -> t
val open_ : fn:string -> t
val flush : t -> unit
val close : t -> unit
val reload : t -> unit

close all existing channels and reopen; this is used for child processes to avoid concurrency issues arising from file offsets and seeking

val list_values : t -> (string * int) list
val list_values_seq : t -> (string * int) Stdlib.Seq.t