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|
(*************************************************************************)
(* *)
(* Objective Caml LablTk library *)
(* *)
(* Francois Rouaix, Francois Pessaux and Jun Furuse *)
(* projet Cristal, INRIA Rocquencourt *)
(* Jacques Garrigue, Kyoto University RIMS *)
(* *)
(* Copyright 1999 Institut National de Recherche en Informatique et *)
(* en Automatique and Kyoto University. All rights reserved. *)
(* This file is distributed under the terms of the GNU Library *)
(* General Public License, with the special exception on linking *)
(* described in file ../../../LICENSE. *)
(* *)
(*************************************************************************)
(* $Id$ *)
(* Timers *)
open Support
open Protocol
type tkTimer = int
external internal_add_timer : int -> cbid -> tkTimer
= "camltk_add_timer"
external internal_rem_timer : tkTimer -> unit
= "camltk_rem_timer"
type t = tkTimer * cbid (* the token and the cb id *)
(* A timer is used only once, so we must clean the callback table *)
let add ~ms ~callback =
let id = new_function_id () in
let wrapped _ =
clear_callback id; (* do it first in case f raises exception *)
callback() in
Hashtbl'.add callback_naming_table ~key:id ~data:wrapped;
if !Protocol.debug then begin
prerr_cbid id; prerr_endline " for timer"
end;
let t = internal_add_timer ms id in
t,id
let set ~ms ~callback = ignore (add ~ms ~callback);;
(* If the timer has never been used, there is a small space leak in
the C heap, where a copy of id has been stored *)
let remove (tkTimer, id) =
internal_rem_timer tkTimer;
clear_callback id
|
