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(***********************************************************************)
(* meteredChannel.ml - Version of the [Channel] objects that keeps *)
(* track of the number of bytes sent through them. *)
(* *)
(* Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, *)
(* 2011, 2012, 2013 Yaron Minsky and Contributors *)
(* *)
(* This file is part of SKS. SKS 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. *)
(* *)
(* This program 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 this program; if not, write to the Free Software *)
(* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *)
(* USA or see <http://www.gnu.org/licenses/>. *)
(***********************************************************************)
open StdLabels
open MoreLabels
module Unix=UnixLabels
class metered_out_channel outc =
object (self)
inherit Channel.out_channel_obj
val mutable count = 0
method private incr c = count <- count + c
method write_string str =
outc#write_string str;
self#incr (String.length str)
method write_string_pos ~buf ~pos ~len =
outc#write_string_pos ~buf ~pos ~len;
self#incr len
method write_char char =
outc#write_char char;
self#incr 1
method write_byte byte =
outc#write_byte byte;
self#incr 1
method flush : unit = outc#flush
method upcast = (self :> Channel.out_channel_obj)
method reset = count <- 0
method bytes = count
end
class metered_in_channel inc =
object (self)
inherit Channel.in_channel_obj
val mutable count = 0
method private incr c = count <- count + c
method read_string len =
self#incr len;
inc#read_string len
method read_string_pos ~buf ~pos ~len =
self#incr len;
inc#read_string_pos ~buf ~pos ~len
method read_char =
self#incr 1;
inc#read_char
method read_byte =
self#incr 1;
inc#read_byte
method upcast = (self :> Channel.in_channel_obj)
method reset = count <- 0
method bytes = count
end
|
