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75 lines
2.5 KiB
75 lines
2.5 KiB
12 years ago
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/*
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Copyright (c) 2009-2012, 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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#include <boost/cstdint.hpp>
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#include "libtorrent/bandwidth_queue_entry.hpp"
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#include <cstring>
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#include <algorithm>
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namespace libtorrent
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{
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bw_request::bw_request(boost::intrusive_ptr<bandwidth_socket> const& pe
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, int blk, int prio)
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: peer(pe)
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, priority(prio)
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, assigned(0)
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, request_size(blk)
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, ttl(20)
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{
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TORRENT_ASSERT(priority > 0);
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std::memset(channel, 0, sizeof(channel));
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}
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int bw_request::assign_bandwidth()
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{
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TORRENT_ASSERT(assigned < request_size);
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int quota = request_size - assigned;
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TORRENT_ASSERT(quota >= 0);
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--ttl;
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if (quota == 0) return quota;
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for (int j = 0; j < 5 && channel[j]; ++j)
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{
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if (channel[j]->throttle() == 0) continue;
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if (channel[j]->tmp == 0) continue;
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quota = (std::min)(int(boost::int64_t(channel[j]->distribute_quota)
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* priority / channel[j]->tmp), quota);
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}
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assigned += quota;
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for (int j = 0; j < 5 && channel[j]; ++j)
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channel[j]->use_quota(quota);
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TORRENT_ASSERT(assigned <= request_size);
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return quota;
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}
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}
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