src/DelayBucket.cc

   1 /*
   2  * $Id: DelayBucket.cc,v 1.8 2008/02/26 21:49:34 amosjeffries Exp $
   3  *
   4  * DEBUG: section 77    Delay Pools
   5  * AUTHOR: Robert Collins <robertc@squid-cache.org>
   6  * Based upon original delay pools code by
   7  *   David Luyer <david@luyer.net>
   8  *
   9  * SQUID Web Proxy Cache          http://www.squid-cache.org/
  10  * ----------------------------------------------------------
  11  *
  12  *  Squid is the result of efforts by numerous individuals from
  13  *  the Internet community; see the CONTRIBUTORS file for full
  14  *  details.   Many organizations have provided support for Squid's
  15  *  development; see the SPONSORS file for full details.  Squid is
  16  *  Copyrighted (C) 2001 by the Regents of the University of
  17  *  California; see the COPYRIGHT file for full details.  Squid
  18  *  incorporates software developed and/or copyrighted by other
  19  *  sources; see the CREDITS file for full details.
  20  *
  21  *  This program is free software; you can redistribute it and/or modify
  22  *  it under the terms of the GNU General Public License as published by
  23  *  the Free Software Foundation; either version 2 of the License, or
  24  *  (at your option) any later version.
  25  *
  26  *  This program is distributed in the hope that it will be useful,
  27  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  28  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  29  *  GNU General Public License for more details.
  30  *
  31  *  You should have received a copy of the GNU General Public License
  32  *  along with this program; if not, write to the Free Software
  33  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  34  *
  35  *
  36  * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org>
  37  */
  38
  39 #include "config.h"
  40
  41 #if DELAY_POOLS
  42 #include "squid.h"
  43 #include "DelayBucket.h"
  44 #include "DelaySpec.h"
  45 #include "Store.h"
  46
  47 #if DEAD_CODE // ?
  48 #include "DelayPools.h"
  49 #include "StoreClient.h"
  50 #include "MemObject.h"
  51 #include "client_side_request.h"
  52 #include "ACLChecklist.h"
  53 #include "ACL.h"
  54 #include "ConfigParser.h"
  55 #include "DelayId.h"
  56 #include "Array.h"
  57 #include "String.h"
  58 #include "CommonPool.h"
  59 #include "CompositePoolNode.h"
  60 #include "DelayPool.h"
  61 #include "DelayVector.h"
  62 #include "NullDelayId.h"
  63 #endif
  64
  65 void
  66 DelayBucket::stats(StoreEntry *entry)const
  67 {
  68     storeAppendPrintf(entry, "%d", level());
  69 }
  70
  71 void
  72 DelayBucket::update(DelaySpec const &rate, int incr)
  73 {
  74     if (rate.restore_bps != -1 &&
  75             (level() += rate.restore_bps * incr) > rate.max_bytes)
  76         level() = rate.max_bytes;
  77 }
  78
  79 int
  80 DelayBucket::bytesWanted(int minimum, int maximum) const
  81 {
  82     int result = max(minimum, min(maximum, level()));
  83     return result;
  84 }
  85
  86 void
  87 DelayBucket::bytesIn(int qty)
  88 {
  89     level() -= qty;
  90 }
  91
  92 void
  93 DelayBucket::init(DelaySpec const &rate)
  94 {
  95     level() = (int) (((double)rate.max_bytes *
  96                       Config.Delay.initial) / 100);
  97 }
  98
  99 #endif