premiere-libtorrent/include/libtorrent/bandwidth_queue_entry.hpp

/*

Copyright (c) 2007-2016, Arvid Norberg
All rights reserved.

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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.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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*/

#ifndef TORRENT_BANDWIDTH_QUEUE_ENTRY_HPP_INCLUDED
#define TORRENT_BANDWIDTH_QUEUE_ENTRY_HPP_INCLUDED

#include <memory>

#include "libtorrent/bandwidth_limit.hpp"
#include "libtorrent/bandwidth_socket.hpp"

namespace libtorrent {

struct TORRENT_EXTRA_EXPORT bw_request
{
	bw_request(std::shared_ptr<bandwidth_socket> const& pe
		, int blk, int prio);

	std::shared_ptr<bandwidth_socket> peer;
	// 1 is normal prio
	int priority;
	// the number of bytes assigned to this request so far
	int assigned;
	// once assigned reaches this, we dispatch the request function
	int request_size;

	// the max number of rounds for this request to survive
	// this ensures that requests gets responses at very low
	// rate limits, when the requested size would take a long
	// time to satisfy
	int ttl;

	// loops over the bandwidth channels and assigns bandwidth
	// from the most limiting one
	int assign_bandwidth();

	constexpr static int max_bandwidth_channels = 10;
	// we don't actually support more than 10 channels per peer
	bandwidth_channel* channel[max_bandwidth_channels];
};

}

#endif