premiere-libtorrent/include/libtorrent/peer_class_set.hpp

/*

Copyright (c) 2011-2016, Arvid Norberg
All rights reserved.

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modification, are permitted provided that the following conditions
are met:

    * Redistributions of source code must retain the above copyright
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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.
    * Neither the name of the author nor the names of its
      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
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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*/

#ifndef TORRENT_PEER_CLASS_SET_HPP_INCLUDED
#define TORRENT_PEER_CLASS_SET_HPP_INCLUDED

#include "libtorrent/peer_class.hpp"
#include <array>

namespace libtorrent {

	// this represents an object that can have many peer classes applied
	// to it. Most notably, peer connections and torrents derive from this.
	struct TORRENT_EXTRA_EXPORT peer_class_set
	{
		peer_class_set() : m_size(0) {}
		void add_class(peer_class_pool& pool, peer_class_t c);
		bool has_class(peer_class_t c) const;
		void remove_class(peer_class_pool& pool, peer_class_t c);
		int num_classes() const { return m_size; }
		peer_class_t class_at(int i) const
		{
			TORRENT_ASSERT(i >= 0 && i < int(m_size));
			return m_class[std::size_t(i)];
		}

	private:

		// the number of elements used in the m_class array
		std::int8_t m_size;

		// if this object belongs to any peer-class, this vector contains all
		// class IDs. Each ID refers to a an entry in m_ses.m_peer_classes which
		// holds the metadata about the class. Classes affect bandwidth limits
		// among other things
		std::array<peer_class_t, 15> m_class;
	};
}

#endif // TORRENT_PEER_CLASS_SET_HPP_INCLUDED