39 lines
1.4 KiB
OCaml
39 lines
1.4 KiB
OCaml
(***********************************************************************)
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(* *)
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(* OCaml *)
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(* *)
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(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* en Automatique. All rights reserved. This file is distributed *)
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(* under the terms of the Q Public License version 1.0. *)
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(* *)
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(***********************************************************************)
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open Event
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type 'a swap_chan = ('a * 'a channel) channel
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let swap msg_out ch =
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guard (fun () ->
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let ic = new_channel() in
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choose [
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wrap (receive ch) (fun (msg_in, oc) -> sync (send oc msg_out); msg_in);
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wrap (send ch (msg_out, ic)) (fun () -> sync (receive ic))
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])
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let ch = new_channel()
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let f () =
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let res = sync (swap "F" ch) in
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print_string "f "; print_string res; print_newline()
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let g () =
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let res = sync (swap "G" ch) in
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print_string "g "; print_string res; print_newline()
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let _ =
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let id = Thread.create f () in
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g ();
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Thread.join id
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