68 lines
2.3 KiB
OCaml
68 lines
2.3 KiB
OCaml
(***********************************************************************)
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(* *)
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(* LablTk, Tcl/Tk interface of Objective Caml *)
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(* *)
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(* Jacques Garrigue, Nagoya University Mathematics Dept. *)
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(* *)
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(* Copyright 2004 Institut National de Recherche en Informatique et *)
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(* en Automatique and Kyoto University. All rights reserved. *)
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(* This file is distributed under the terms of the GNU Library *)
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(* General Public License, with the special exception on linking *)
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(* described in file LICENSE found in the Objective Caml source tree. *)
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(* *)
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(***********************************************************************)
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(* $Id$ *)
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let jobs : (unit -> unit) Queue.t = Queue.create ()
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let m = Mutex.create ()
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let with_jobs f =
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Mutex.lock m; let y = f jobs in Mutex.unlock m; y
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let loop_id = ref None
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let reset () = loop_id := None
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let cannot_sync () =
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match !loop_id with None -> true
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| Some id -> Thread.id (Thread.self ()) = id
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let gui_safe () =
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not (Sys.os_type = "Win32") || !loop_id = Some(Thread.id (Thread.self ()))
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let has_jobs () = not (with_jobs Queue.is_empty)
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let n_jobs () = with_jobs Queue.length
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let do_next_job () = with_jobs Queue.take ()
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let async j x = with_jobs (Queue.add (fun () -> j x))
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let sync f x =
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if cannot_sync () then f x else
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let m = Mutex.create () in
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let res = ref None in
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Mutex.lock m;
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let c = Condition.create () in
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let j x =
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let y = f x in Mutex.lock m; res := Some y; Mutex.unlock m;
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Condition.signal c
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in
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async j x;
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Condition.wait c m;
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match !res with Some y -> y | None -> assert false
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let rec job_timer () =
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Timer.set ~ms:10 ~callback:
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(fun () -> for i = 1 to n_jobs () do do_next_job () done; job_timer())
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let thread_main () =
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try
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ignore (Protocol.openTk());
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job_timer();
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loop_id := Some (Thread.id (Thread.self ()));
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Protocol.mainLoop();
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loop_id := None;
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with exn ->
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loop_id := None;
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raise exn
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let start () =
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Thread.create thread_main ()
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let top = Widget.default_toplevel
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