82 lines
2.9 KiB
OCaml
82 lines
2.9 KiB
OCaml
(*************************************************************************)
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(* *)
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(* Objective Caml LablTk library *)
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(* *)
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(* Francois Rouaix, Francois Pessaux and Jun Furuse *)
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(* projet Cristal, INRIA Rocquencourt *)
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(* Jacques Garrigue, Kyoto University RIMS *)
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(* *)
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(* Copyright 1999 Institut National de Recherche en Informatique et *)
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(* en Automatique and Kyoto University. All rights reserved. *)
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(* This file is distributed under the terms of the GNU Library *)
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(* General Public License, with the special exception on linking *)
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(* described in file ../../../LICENSE. *)
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(* *)
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(*************************************************************************)
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(* $Id$ *)
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open Unix
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open Support
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open Protocol
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external add_file_input : file_descr -> cbid -> unit
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= "camltk_add_file_input"
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external rem_file_input : file_descr -> unit
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= "camltk_rem_file_input"
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external add_file_output : file_descr -> cbid -> unit
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= "camltk_add_file_output"
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external rem_file_output : file_descr -> unit
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= "camltk_rem_file_output"
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(* File input handlers *)
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let fd_table = Hashtbl.create 37 (* Avoid space leak in callback table *)
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let add_fileinput ~fd ~callback:f =
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let id = new_function_id () in
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Hashtbl'.add callback_naming_table ~key:id ~data:(fun _ -> f());
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Hashtbl'.add fd_table ~key:(fd, 'r') ~data:id;
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if !Protocol.debug then begin
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Protocol.prerr_cbid id; prerr_endline " for fileinput"
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end;
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add_file_input fd id
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let remove_fileinput ~fd =
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try
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let id = Hashtbl.find fd_table (fd, 'r') in
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clear_callback id;
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Hashtbl.remove fd_table (fd, 'r');
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if !Protocol.debug then begin
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prerr_string "clear ";
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Protocol.prerr_cbid id;
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prerr_endline " for fileinput"
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end;
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rem_file_input fd
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with
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Not_found -> ()
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let add_fileoutput ~fd ~callback:f =
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let id = new_function_id () in
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Hashtbl'.add callback_naming_table ~key:id ~data:(fun _ -> f());
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Hashtbl'.add fd_table ~key:(fd, 'w') ~data:id;
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if !Protocol.debug then begin
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Protocol.prerr_cbid id; prerr_endline " for fileoutput"
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end;
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add_file_output fd id
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let remove_fileoutput ~fd =
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try
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let id = Hashtbl.find fd_table (fd, 'w') in
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clear_callback id;
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Hashtbl.remove fd_table (fd, 'w');
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if !Protocol.debug then begin
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prerr_string "clear ";
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Protocol.prerr_cbid id;
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prerr_endline " for fileoutput"
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end;
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rem_file_output fd
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with
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Not_found -> ()
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