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(* $Id$ *)
(* Timers *)
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:milli callback:f =
let id = new_function_id () in
let wrapped _ =
clear_callback id; (* do it first in case f raises exception *)
f() 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 milli id in
t,id
(* 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
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