Reason · Reason lets you write simple, fast and quality type safe code while leveraging both the JavaScript & OCaml ecosystems.

sig
 type !'a t
 val spawn : (unit -> 'a) -> 'a Domain.t
 val join : 'a Domain.t -> 'a
 type id = private int
 val get_id : 'a Domain.t -> Domain.id
 val self : unit -> Domain.id
 val before_first_spawn : (unit -> unit) -> unit
 val at_exit : (unit -> unit) -> unit
 val cpu_relax : unit -> unit
 val is_main_domain : unit -> bool
 val recommended_domain_count : unit -> int
 module DLS :
  sig
   type 'a key
   val new_key :
    ?split_from_parent:('a -> 'a) -> (unit -> 'a) -> 'a Domain.DLS.key
   val get : 'a Domain.DLS.key -> 'a
   val set : 'a Domain.DLS.key -> 'a -> unit
  end
end