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Copyright (c) 2007, Arvid Norberg
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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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* 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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#ifndef TORRENT_BANDWIDTH_LIMIT_HPP_INCLUDED
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#define TORRENT_BANDWIDTH_LIMIT_HPP_INCLUDED
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#include <boost/integer_traits.hpp>
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#include "libtorrent/assert.hpp"
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namespace libtorrent {
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// member of peer_connection
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struct bandwidth_limit
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static const int inf = boost::integer_traits<int>::const_max;
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void throttle(int limit)
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TORRENT_ASSERT(limit > 0);
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m_local_limit = limit;
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void assign(int amount)
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TORRENT_ASSERT(amount >= 0);
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m_current_rate += amount;
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m_quota_left += amount;
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void use_quota(int amount)
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TORRENT_ASSERT(amount <= m_quota_left);
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m_quota_left -= amount;
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int quota_left() const
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return (std::max)(m_quota_left, 0);
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void expire(int amount)
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TORRENT_ASSERT(amount >= 0);
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m_current_rate -= amount;
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int max_assignable() const
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if (m_local_limit == inf) return inf;
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if (m_local_limit <= m_current_rate) return 0;
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return m_local_limit - m_current_rate;
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// this is the amount of bandwidth we have
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// been assigned without using yet. i.e.
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// the bandwidth that we use up every time
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// we receive or send a message. Once this
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// hits zero, we need to request more
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// bandwidth from the torrent which
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// in turn will request bandwidth from
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// the bandwidth manager
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// the local limit is the number of bytes
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// per window size we are allowed to use.
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// the current rate is the number of
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// bytes we have been assigned within
added
removed
include/libtorrent/bandwidth_limit.hpp
