src/base/bittorrent/speedmonitor.h

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2015  Vladimir Golovnev <glassez@yandex.ru>
   4  * Copyright (C) 2011  Christophe Dumez <chris@qbittorrent.org>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19  *
  20  * In addition, as a special exception, the copyright holders give permission to
  21  * link this program with the OpenSSL project's "OpenSSL" library (or with
  22  * modified versions of it that use the same license as the "OpenSSL" library),
  23  * and distribute the linked executables. You must obey the GNU General Public
  24  * License in all respects for all of the code used other than "OpenSSL".  If you
  25  * modify file(s), you may extend this exception to your version of the file(s),
  26  * but you are not obligated to do so. If you do not wish to do so, delete this
  27  * exception statement from your version.
  28  */
  29
  30 #pragma once
  31
  32 #ifndef Q_MOC_RUN
  33 #include <boost/circular_buffer.hpp>
  34 #endif
  35
  36 #include <QtTypes>
  37
  38 template<typename T>
  39 struct Sample
  40 {
  41     constexpr Sample() = default;
  42
  43     constexpr Sample(const T dl, const T ul)
  44         : download {dl}
  45         , upload {ul}
  46     {
  47     }
  48
  49     constexpr Sample<T> &operator+=(const Sample<T> &other)
  50     {
  51         download += other.download;
  52         upload += other.upload;
  53         return *this;
  54     }
  55
  56     constexpr Sample<T> &operator-=(const Sample<T> &other)
  57     {
  58         download -= other.download;
  59         upload -= other.upload;
  60         return *this;
  61     }
  62
  63     T download {};
  64     T upload {};
  65 };
  66
  67 using SpeedSample = Sample<qlonglong>;
  68 using SpeedSampleAvg = Sample<qreal>;
  69
  70 class SpeedMonitor
  71 {
  72 public:
  73     SpeedMonitor();
  74
  75     void addSample(const SpeedSample &sample);
  76     SpeedSampleAvg average() const;
  77     void reset();
  78
  79 private:
  80     static const int MAX_SAMPLES = 30;
  81     boost::circular_buffer<SpeedSample> m_speedSamples;
  82     SpeedSample m_sum;
  83 };