(*
 * Accretio is an API, a sandbox and a runtime for social playbooks
 *
 * Copyright (C) 2015 William Le Ferrand
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *)


(* the challenge here is to avoid recursion as JS doesn't have TCO *)

open Lwt

type 'a throttle = {
  callback : 'a -> unit Lwt.t ;
  mutable active : bool ;
  mutable next : 'a option ;
}

let create callback =
  {
    callback ;
    active = false ;
    next = None ;
  }

let send t v =
  t.callback v
