src/StatHist.h

   1 /*
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   3  * ----------------------------------------------------------
   4  *
   5  *  Squid is the result of efforts by numerous individuals from
   6  *  the Internet community; see the CONTRIBUTORS file for full
   7  *  details.   Many organizations have provided support for Squid's
   8  *  development; see the SPONSORS file for full details.  Squid is
   9  *  Copyrighted (C) 2001 by the Regents of the University of
  10  *  California; see the COPYRIGHT file for full details.  Squid
  11  *  incorporates software developed and/or copyrighted by other
  12  *  sources; see the CREDITS file for full details.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License as published by
  16  *  the Free Software Foundation; either version 2 of the License, or
  17  *  (at your option) any later version.
  18  *
  19  *  This program is distributed in the hope that it will be useful,
  20  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *  GNU General Public License for more details.
  23  *
  24  *  You should have received a copy of the GNU General Public License
  25  *  along with this program; if not, write to the Free Software
  26  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  27  *
  28  *  AUTHOR: Francesco Chemolli
  29  */
  30
  31 #ifndef STATHIST_H_
  32 #define STATHIST_H_
  33
  34 #include "config.h"
  35
  36 /*
  37  * "very generic" histogram;
  38  * see important comments on hbase_f restrictions in StatHist.c
  39  */
  40
  41 class StatHist {
  42 public:
  43     void clear();
  44     int *bins;
  45     int capacity;
  46     double min;
  47     double max;
  48     double scale;
  49     hbase_f *val_in;        /* e.g., log() for log-based histogram */
  50     hbase_f *val_out;       /* e.g., exp() for log based histogram */
  51 };
  52
  53 /* StatHist */
  54 SQUIDCEXTERN void statHistCount(StatHist * H, double val);
  55 SQUIDCEXTERN void statHistCopy(StatHist * Dest, const StatHist * Orig);
  56 SQUIDCEXTERN void statHistSafeCopy(StatHist * Dest, const StatHist * Orig);
  57 SQUIDCEXTERN double statHistDeltaMedian(const StatHist * A, const StatHist * B);
  58 SQUIDCEXTERN double statHistDeltaPctile(const StatHist * A, const StatHist * B, double pctile);
  59 SQUIDCEXTERN void statHistDump(const StatHist * H, StoreEntry * sentry, StatHistBinDumper * bd);
  60 SQUIDCEXTERN void statHistLogInit(StatHist * H, int capacity, double min, double max);
  61 SQUIDCEXTERN void statHistEnumInit(StatHist * H, int last_enum);
  62 SQUIDCEXTERN void statHistIntInit(StatHist * H, int n);
  63 SQUIDCEXTERN StatHistBinDumper statHistEnumDumper;
  64 SQUIDCEXTERN StatHistBinDumper statHistIntDumper;
  65
  66
  67
  68
  69 #endif /* STATHIST_H_ */