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|
(**************************************************************************)
(* *)
(* OCaml *)
(* *)
(* Jerome Vouillon, projet Cristal, INRIA Rocquencourt *)
(* OCaml port by John Malecki and Xavier Leroy *)
(* *)
(* Copyright 1996 Institut National de Recherche en Informatique et *)
(* en Automatique. *)
(* *)
(* All rights reserved. This file is distributed under the terms of *)
(* the GNU Lesser General Public License version 2.1, with the *)
(* special exception on linking described in the file LICENSE. *)
(* *)
(**************************************************************************)
(* Handling of keyboard interrupts *)
let interrupted = ref false
let is_protected = ref false
let break _signum =
if !is_protected
then interrupted := true
else raise Sys.Break
let _ =
match Sys.os_type with
"Win32" -> ()
| _ ->
Sys.set_signal Sys.sigint (Sys.Signal_handle break);
Sys.set_signal Sys.sigpipe (Sys.Signal_handle(fun _ -> raise End_of_file))
let protect f =
if !is_protected then
f ()
else begin
is_protected := true;
if not !interrupted then
f ();
is_protected := false;
if !interrupted then begin interrupted := false; raise Sys.Break end
end
let unprotect f =
if not !is_protected then
f ()
else begin
is_protected := false;
if !interrupted then begin interrupted := false; raise Sys.Break end;
f ();
is_protected := true
end
|
