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(***********************************************************************)
(* *)
(* OCaml *)
(* *)
(* Xavier Leroy and Damien Doligez, INRIA Rocquencourt *)
(* *)
(* Copyright 1996 Institut National de Recherche en Informatique et *)
(* en Automatique. 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. *)
(* *)
(***********************************************************************)
(* $Id$ *)
type t = { mutable waiting: Thread.t list }
let create () = { waiting = [] }
let wait cond mut =
Thread.critical_section := true;
Mutex.unlock mut;
cond.waiting <- Thread.self() :: cond.waiting;
Thread.sleep();
Mutex.lock mut
let signal cond =
match cond.waiting with (* atomic *)
[] -> ()
| th :: rem -> cond.waiting <- rem (* atomic *); Thread.wakeup th
let broadcast cond =
let w = cond.waiting in (* atomic *)
cond.waiting <- []; (* atomic *)
List.iter Thread.wakeup w
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