libtorrent-rasterbar-dev 1.1.5-1build1 / usr / include / libtorrent / stat.hpp

/*

Copyright (c) 2003-2016, Arvid Norberg
All rights reserved.

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modification, are permitted provided that the following conditions
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    * Redistributions in binary form must reproduce the above copyright
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      the documentation and/or other materials provided with the distribution.
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      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.

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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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*/

#ifndef TORRENT_STAT_HPP_INCLUDED
#define TORRENT_STAT_HPP_INCLUDED

#include <algorithm>
#include <vector>
#include <assert.h>
#include <cstring>
#include <limits>

#include "libtorrent/aux_/disable_warnings_push.hpp"
#include <boost/cstdint.hpp>
#include "libtorrent/aux_/disable_warnings_pop.hpp"

#include "libtorrent/invariant_check.hpp"
#include "libtorrent/config.hpp"
#include "libtorrent/assert.hpp"

namespace libtorrent
{
	class TORRENT_EXTRA_EXPORT stat_channel
	{
	public:

		stat_channel()
			: m_total_counter(0)
			, m_counter(0)
			, m_5_sec_average(0)
		{}

		void operator+=(stat_channel const& s)
		{
			TORRENT_ASSERT(m_counter < (std::numeric_limits<boost::uint32_t>::max)() - s.m_counter);
			m_counter += s.m_counter;
			TORRENT_ASSERT(m_total_counter < (std::numeric_limits<boost::uint64_t>::max)() - s.m_counter);
			m_total_counter += s.m_counter;
		}

		void add(int count)
		{
			TORRENT_ASSERT(count >= 0);

			TORRENT_ASSERT(m_counter < (std::numeric_limits<boost::uint32_t>::max)() - count);
			m_counter += count;
			TORRENT_ASSERT(m_total_counter < (std::numeric_limits<boost::uint64_t>::max)() - count);
			m_total_counter += count;
		}

		// should be called once every second
		void second_tick(int tick_interval_ms);
		int rate() const { return m_5_sec_average; }
		int low_pass_rate() const { return m_5_sec_average; }

		boost::int64_t total() const { return m_total_counter; }

		void offset(boost::int64_t c)
		{
			TORRENT_ASSERT(m_total_counter < (std::numeric_limits<boost::uint64_t>::max)() - c);
			m_total_counter += c;
		}

		int counter() const { return m_counter; }

		void clear()
		{
			m_counter = 0;
			m_5_sec_average = 0;
			m_total_counter = 0;
		}

	private:

		// total counters
		boost::uint64_t m_total_counter;

		// the accumulator for this second.
		boost::uint32_t m_counter;

		// sliding average
		boost::uint32_t m_5_sec_average;
	};

	class TORRENT_EXTRA_EXPORT stat
	{
	friend class invariant_access;
	public:
		void operator+=(const stat& s)
		{
			for (int i = 0; i < num_channels; ++i)
				m_stat[i] += s.m_stat[i];
		}

		void sent_syn(bool ipv6)
		{
			m_stat[upload_ip_protocol].add(ipv6 ? 60 : 40);
		}

		void received_synack(bool ipv6)
		{
			// we received SYN-ACK and also sent ACK back
			m_stat[download_ip_protocol].add(ipv6 ? 60 : 40);
			m_stat[upload_ip_protocol].add(ipv6 ? 60 : 40);
		}

		void received_bytes(int bytes_payload, int bytes_protocol)
		{
			TORRENT_ASSERT(bytes_payload >= 0);
			TORRENT_ASSERT(bytes_protocol >= 0);

			m_stat[download_payload].add(bytes_payload);
			m_stat[download_protocol].add(bytes_protocol);
		}

		void sent_bytes(int bytes_payload, int bytes_protocol)
		{
			TORRENT_ASSERT(bytes_payload >= 0);
			TORRENT_ASSERT(bytes_protocol >= 0);

			m_stat[upload_payload].add(bytes_payload);
			m_stat[upload_protocol].add(bytes_protocol);
		}

		// and IP packet was received or sent
		// account for the overhead caused by it
		void trancieve_ip_packet(int bytes_transferred, bool ipv6)
		{
			// one TCP/IP packet header for the packet
			// sent or received, and one for the ACK
			// The IPv4 header is 20 bytes
			// and IPv6 header is 40 bytes
			const int header = (ipv6 ? 40 : 20) + 20;
			const int mtu = 1500;
			const int packet_size = mtu - header;
			const int overhead = (std::max)(1, (bytes_transferred + packet_size - 1) / packet_size) * header;
			m_stat[download_ip_protocol].add(overhead);
			m_stat[upload_ip_protocol].add(overhead);
		}

		int upload_ip_overhead() const { return m_stat[upload_ip_protocol].counter(); }
		int download_ip_overhead() const { return m_stat[download_ip_protocol].counter(); }

		// should be called once every second
		void second_tick(int tick_interval_ms)
		{
			for (int i = 0; i < num_channels; ++i)
				m_stat[i].second_tick(tick_interval_ms);
		}

		int low_pass_upload_rate() const
		{
			return m_stat[upload_payload].low_pass_rate()
				+ m_stat[upload_protocol].low_pass_rate()
				+ m_stat[upload_ip_protocol].low_pass_rate();
		}

		int low_pass_download_rate() const
		{
			return m_stat[download_payload].low_pass_rate()
				+ m_stat[download_protocol].low_pass_rate()
				+ m_stat[download_ip_protocol].low_pass_rate();
		}

		int upload_rate() const
		{
			return m_stat[upload_payload].rate()
				+ m_stat[upload_protocol].rate()
				+ m_stat[upload_ip_protocol].rate();
		}

		int download_rate() const
		{
			return m_stat[download_payload].rate()
				+ m_stat[download_protocol].rate()
				+ m_stat[download_ip_protocol].rate();
		}

		boost::int64_t total_upload() const
		{
			return m_stat[upload_payload].total()
				+ m_stat[upload_protocol].total()
				+ m_stat[upload_ip_protocol].total();
		}

		boost::int64_t total_download() const
		{
			return m_stat[download_payload].total()
				+ m_stat[download_protocol].total()
				+ m_stat[download_ip_protocol].total();
		}

		int upload_payload_rate() const
		{ return m_stat[upload_payload].rate(); }
		int download_payload_rate() const
		{ return m_stat[download_payload].rate(); }

		boost::int64_t total_payload_upload() const
		{ return m_stat[upload_payload].total(); }
		boost::int64_t total_payload_download() const
		{ return m_stat[download_payload].total(); }

		boost::int64_t total_protocol_upload() const
		{ return m_stat[upload_protocol].total(); }
		boost::int64_t total_protocol_download() const
		{ return m_stat[download_protocol].total(); }

		boost::int64_t total_transfer(int channel) const
		{ return m_stat[channel].total(); }
		int transfer_rate(int channel) const
		{ return m_stat[channel].rate(); }

		// this is used to offset the statistics when a
		// peer_connection is opened and have some previous
		// transfers from earlier connections.
		void add_stat(boost::int64_t downloaded, boost::int64_t uploaded)
		{
			m_stat[download_payload].offset(downloaded);
			m_stat[upload_payload].offset(uploaded);
		}

		int last_payload_downloaded() const
		{ return m_stat[download_payload].counter(); }
		int last_payload_uploaded() const
		{ return m_stat[upload_payload].counter(); }
		int last_protocol_downloaded() const
		{ return m_stat[download_protocol].counter(); }
		int last_protocol_uploaded() const
		{ return m_stat[upload_protocol].counter(); }

		// these are the channels we keep stats for
		enum
		{
			// TODO: 3 everything but payload counters and rates could probably be
			// removed from here
			upload_payload,
			upload_protocol,
			download_payload,
			download_protocol,
			upload_ip_protocol,
			download_ip_protocol,
			num_channels
		};

		void clear()
		{
			for (int i = 0; i < num_channels; ++i)
				m_stat[i].clear();
		}

		stat_channel const& operator[](int i) const
		{
			TORRENT_ASSERT(i >= 0 && i < num_channels);
			return m_stat[i];
		}

	private:

		stat_channel m_stat[num_channels];
	};

}

#endif // TORRENT_STAT_HPP_INCLUDED