This commit was manufactured by cvs2svn to create branch 'moogle'.

[helm.git] / helm / ocaml / thread / extThread.ml

diff --git a/helm/ocaml/thread/extThread.ml b/helm/ocaml/thread/extThread.ml
deleted file mode 100644 (file)
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--- a/helm/ocaml/thread/extThread.ml
+++ /dev/null
@@ -1,108 +0,0 @@
-(*
- * Copyright (C) 2003-2004:
- *    Stefano Zacchiroli <zack@cs.unibo.it>
- *    for the HELM Team http://helm.cs.unibo.it/
- *
- *  This file is part of HELM, an Hypertextual, Electronic
- *  Library of Mathematics, developed at the Computer Science
- *  Department, University of Bologna, Italy.
- *
- *  HELM is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version 2
- *  of the License, or (at your option) any later version.
- *
- *  HELM is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with HELM; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- *  MA  02111-1307, USA.
- *
- *  For details, see the HELM World-Wide-Web page,
- *  http://helm.cs.unibo.it/
- *)
-
-let debug = true
-let debug_print s = if debug then prerr_endline s
-
-exception Can_t_kill of Thread.t * string (* thread, reason *)
-exception Thread_not_found of Thread.t
-
-module OrderedPid =
-  struct
-    type t = int
-    let compare = Pervasives.compare
-  end
-module PidSet = Set.Make (OrderedPid)
-
- (* perform an action inside a critical section controlled by given mutex *)
-let do_critical mutex =
-  fun action ->
-    try
-      Mutex.lock mutex;
-      let res = Lazy.force action in
-      Mutex.unlock mutex;
-      res 
-    with e -> Mutex.unlock mutex; raise e
-
-let kill_signal = Sys.sigusr2   (* signal used to kill children *)
-let chan = Event.new_channel () (* communication channel between threads *)
-let creation_mutex = Mutex.create ()
-let dead_threads_walking = ref PidSet.empty
-let pids: (Thread.t, int) Hashtbl.t = Hashtbl.create 17
-
-  (* given a thread body (i.e. first argument of a Thread.create invocation)
-  return a new thread body which unblock the kill signal and send its pid to
-  parent over "chan" *)
-let wrap_thread body =
-  fun arg ->
-    ignore (Unix.sigprocmask Unix.SIG_UNBLOCK [ kill_signal ]);
-    Event.sync (Event.send chan (Unix.getpid ()));
-    body arg
-
-(*
-(* FAKE IMPLEMENTATION *)
-let create = Thread.create
-let kill _ = ()
-*)
-
-let create body arg =
-  do_critical creation_mutex (lazy (
-    let thread_t = Thread.create (wrap_thread body) arg in
-    let pid = Event.sync (Event.receive chan) in
-    Hashtbl.add pids thread_t pid;
-    thread_t
-  ))
-
-let kill thread_t =
-  try
-    let pid =
-      try
-        Hashtbl.find pids thread_t
-      with Not_found -> raise (Thread_not_found thread_t)
-    in
-    dead_threads_walking := PidSet.add pid !dead_threads_walking;
-    Unix.kill pid kill_signal
-  with e -> raise (Can_t_kill (thread_t, Printexc.to_string e))
-
-  (* "kill_signal" handler, check if current process must die, if this is the
-  case exits with Thread.exit *)
-let _ =
-  ignore (Sys.signal kill_signal (Sys.Signal_handle
-    (fun signal ->
-      let myself = Unix.getpid () in
-      match signal with
-      | sg when (sg = kill_signal) &&
-                (PidSet.mem myself !dead_threads_walking) ->
-          dead_threads_walking := PidSet.remove myself !dead_threads_walking;
-          debug_print "AYEEEEH!";
-          Thread.exit ()
-      | _ -> ())))
-
-  (* block kill signal in main process *)
-let _ = ignore (Unix.sigprocmask Unix.SIG_BLOCK [ kill_signal ])
-