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