otherlibs/labltk/frx/frx_fileinput.ml

   1 (***********************************************************************)
   2 (*                                                                     *)
   3 (*                 MLTk, Tcl/Tk interface of Objective Caml            *)
   4 (*                                                                     *)
   5 (*    Francois Rouaix, Francois Pessaux, Jun Furuse and Pierre Weis    *)
   6 (*               projet Cristal, INRIA Rocquencourt                    *)
   7 (*            Jacques Garrigue, Kyoto University RIMS                  *)
   8 (*                                                                     *)
   9 (*  Copyright 2002 Institut National de Recherche en Informatique et   *)
  10 (*  en Automatique and Kyoto University.  All rights reserved.         *)
  11 (*  This file is distributed under the terms of the GNU Library        *)
  12 (*  General Public License, with the special exception on linking      *)
  13 (*  described in file LICENSE found in the Objective Caml source tree. *)
  14 (*                                                                     *)
  15 (***********************************************************************)
  16 open Camltk
  17
  18 let version = "$Id$"
  19
  20 (*
  21  * Simple spooling for fileinput callbacks
  22  *)
  23
  24 let waiting_list = Queue. new()
  25 and waiting = ref 0
  26 and max_open = ref 10
  27 and cur_open = ref 0
  28
  29 let add fd f =
  30   if !cur_open < !max_open then begin
  31     incr cur_open;
  32     add_fileinput fd f
  33     end
  34   else begin
  35     incr waiting;
  36     Queue.add (fd,f) waiting_list
  37   end
  38
  39 let remove fd =
  40