forked from premiere/premiere-libtorrent
151 lines
4.9 KiB
C++
151 lines
4.9 KiB
C++
/*
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Copyright (c) 2011-2015, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_PEER_CLASS_HPP_INCLUDED
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#define TORRENT_PEER_CLASS_HPP_INCLUDED
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#include "libtorrent/bandwidth_limit.hpp"
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#include "libtorrent/assert.hpp"
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#include "libtorrent/aux_/disable_warnings_push.hpp"
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#include <vector>
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#include <string>
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#include <boost/smart_ptr.hpp>
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#include <boost/cstdint.hpp>
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#include "libtorrent/aux_/disable_warnings_pop.hpp"
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namespace libtorrent
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{
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typedef boost::uint8_t peer_class_t;
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struct peer_class_info
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{
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// ``ignore_unchoke_slots`` determines whether peers should always
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// unchoke a peer, regardless of the choking algorithm, or if it should
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// honor the unchoke slot limits. It's used for local peers by default.
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// If *any* of the peer classes a peer belongs to has this set to true,
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// that peer will be unchoked at all times.
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bool ignore_unchoke_slots;
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// adjusts the connection limit (global and per torrent) that applies to
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// this peer class. By default, local peers are allowed to exceed the
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// normal connection limit for instance. This is specified as a percent
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// factor. 100 makes the peer class apply normally to the limit. 200
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// means as long as there are fewer connections than twice the limit, we
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// accept this peer. This factor applies both to the global connection
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// limit and the per-torrent limit. Note that if not used carefully one
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// peer class can potentially completely starve out all other over time.
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int connection_limit_factor;
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// not used by libtorrent. It's intended as a potentially user-facing
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// identifier of this peer class.
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std::string label;
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// transfer rates limits for the whole peer class. They are specified in
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// bytes per second and apply to the sum of all peers that are members of
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// this class.
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int upload_limit;
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int download_limit;
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// relative priorities used by the bandwidth allocator in the rate
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// limiter. If no rate limits are in use, the priority is not used
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// either. Priorities start at 1 (0 is not a valid priority) and may not
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// exceed 255.
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int upload_priority;
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int download_priority;
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};
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struct TORRENT_EXTRA_EXPORT peer_class : boost::enable_shared_from_this<peer_class>
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{
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friend struct peer_class_pool;
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peer_class(std::string const& l)
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: ignore_unchoke_slots(false)
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, connection_limit_factor(100)
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, label(l)
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, references(1)
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{
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priority[0] = 1;
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priority[1] = 1;
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}
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void set_info(peer_class_info const* pci);
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void get_info(peer_class_info* pci) const;
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void set_upload_limit(int limit);
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void set_download_limit(int limit);
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// the bandwidth channels, upload and download
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// keeps track of the current quotas
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bandwidth_channel channel[2];
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bool ignore_unchoke_slots;
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int connection_limit_factor;
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// priority for bandwidth allocation
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// in rate limiter. One for upload and one
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// for download
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int priority[2];
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// the name of this peer class
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std::string label;
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private:
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int references;
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};
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struct TORRENT_EXTRA_EXPORT peer_class_pool
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{
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peer_class_t new_peer_class(std::string const& label);
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void decref(peer_class_t c);
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void incref(peer_class_t c);
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peer_class* at(peer_class_t c);
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peer_class const* at(peer_class_t c) const;
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private:
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// state for peer classes (a peer can belong to multiple classes)
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// this can control
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std::vector<boost::shared_ptr<peer_class> > m_peer_classes;
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// indices in m_peer_classes that are no longer used
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std::vector<peer_class_t> m_free_list;
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};
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}
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#endif // TORRENT_PEER_CLASS_HPP_INCLUDED
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