File : adagio-bandwidth_manager.ads
------------------------------------------------------------------------------
-- ADAGIO - ADALID - AENEA. --
-- --
-- Copyright (C) 2003 --
-- A. Mosteo. --
-- --
-- Authors: A. Mosteo. (adagio@mosteo.com) --
-- --
-- If you have any questions in regard to this software, please address --
-- them to the above email. --
-- --
-- This program 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 library; if not, write to the Free Software Foundation, --
-- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- You are not allowed to use any part of this code to develop a program --
-- whose output would be used to harass or prosecute other users of the --
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-- $Id: adagio-bandwidth_manager.ads,v 1.7 2004/03/22 07:14:57 Jano Exp $
-- Task for bandwidth management
with Ada.Calendar;
use Ada;
package Adagio.Bandwidth_manager is
-- Bandwidth is the bytes/second to manage
-- Period is the period for feedback. Longer ones allow the use
-- of unused bandwidth for more time. (In milliseconds)
protected type Object (Bandwidth : Speed; Period : Natural) is
-- Gives the available bandwidth at this moment (real + extra):
procedure Available (Bandwidth : out Natural);
-- Issue a bandwidth petition. Awarded can be less that solicited.
-- Extra flag requests bandwidth from unused past cycles.
procedure Commit (
Desired : in Natural;
Awarded : out Natural;
Extra : in Boolean := false);
private
Gap : Duration := Duration (Period) / 1000.0;
Remanent : Natural := 0;
Unused : Natural := 0;
Last_req : Calendar.Time := Calendar.Clock;
end Object;
type Object_access is access all Object;
end Adagio.Bandwidth_manager;