mirror of https://github.com/aria2/aria2
106 lines
3.6 KiB
C++
106 lines
3.6 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#include "ActivePeerConnectionCommand.h"
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#include "PeerInitiateConnectionCommand.h"
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#include "CUIDCounter.h"
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#include "message.h"
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#include "DownloadEngine.h"
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#include "BtContext.h"
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#include "PeerStorage.h"
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#include "PieceStorage.h"
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#include "BtRuntime.h"
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#include "Peer.h"
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#include "Logger.h"
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#include "prefs.h"
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#include "Option.h"
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#include "BtConstants.h"
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namespace aria2 {
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ActivePeerConnectionCommand::ActivePeerConnectionCommand(int cuid,
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RequestGroup* requestGroup,
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DownloadEngine* e,
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const BtContextHandle& btContext,
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int32_t interval)
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:Command(cuid),
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BtContextAwareCommand(btContext),
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RequestGroupAware(requestGroup),
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interval(interval),
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e(e),
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_thresholdSpeed(SLOW_SPEED_THRESHOLD),
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_numNewConnection(5)
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{
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int32_t maxDownloadSpeed = e->option->getAsInt(PREF_MAX_DOWNLOAD_LIMIT);
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if(maxDownloadSpeed > 0) {
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_thresholdSpeed = std::min(maxDownloadSpeed, _thresholdSpeed);
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}
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}
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ActivePeerConnectionCommand::~ActivePeerConnectionCommand() {}
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bool ActivePeerConnectionCommand::execute() {
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if(btRuntime->isHalt()) {
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return true;
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}
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if(!pieceStorage->downloadFinished() && checkPoint.elapsed(interval)) {
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checkPoint.reset();
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TransferStat tstat = peerStorage->calculateStat();
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size_t numAdd = btRuntime->lessThanEqMinPeer() ? MIN_PEERS-btRuntime->getConnections():_numNewConnection;
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if(tstat.getDownloadSpeed() < _thresholdSpeed || btRuntime->lessThanEqMinPeer()) {
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for(; numAdd > 0 && peerStorage->isPeerAvailable(); --numAdd) {
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PeerHandle peer = peerStorage->getUnusedPeer();
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connectToPeer(peer);
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}
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}
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}
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e->commands.push_back(this);
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return false;
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}
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void ActivePeerConnectionCommand::connectToPeer(const PeerHandle& peer)
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{
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if(peer.isNull()) {
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return;
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}
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peer->usedBy(CUIDCounterSingletonHolder::instance()->newID());
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PeerInitiateConnectionCommand* command =
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new PeerInitiateConnectionCommand(peer->usedBy(), _requestGroup, peer, e, btContext);
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e->commands.push_back(command);
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logger->info(MSG_CONNECTING_TO_PEER,
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cuid, peer->ipaddr.c_str());
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}
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} // namespace aria2
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