mirror of https://github.com/aria2/aria2
286 lines
8.9 KiB
C++
286 lines
8.9 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) 2010 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 "PollEventPoll.h"
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#include <cstring>
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#include <algorithm>
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#include <numeric>
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#include "Command.h"
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#include "LogFactory.h"
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#include "Logger.h"
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#include "a2functional.h"
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#include "fmt.h"
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#include "util.h"
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namespace aria2 {
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PollEventPoll::KSocketEntry::KSocketEntry(sock_t s)
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: SocketEntry<KCommandEvent, KADNSEvent>(s)
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{}
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int accumulateEvent(int events, const PollEventPoll::KEvent& event)
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{
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return events|event.getEvents();
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}
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struct pollfd PollEventPoll::KSocketEntry::getEvents()
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{
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struct pollfd pollEvent;
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pollEvent.fd = socket_;
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#ifdef ENABLE_ASYNC_DNS
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pollEvent.events =
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std::accumulate(adnsEvents_.begin(),
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adnsEvents_.end(),
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std::accumulate(commandEvents_.begin(),
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commandEvents_.end(), 0, accumulateEvent),
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accumulateEvent);
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#else // !ENABLE_ASYNC_DNS
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pollEvent.events =
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std::accumulate(commandEvents_.begin(), commandEvents_.end(), 0,
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accumulateEvent);
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#endif // !ENABLE_ASYNC_DNS
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pollEvent.revents = 0;
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return pollEvent;
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}
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PollEventPoll::PollEventPoll()
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: pollfdCapacity_(1024),
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pollfdNum_(0)
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{
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pollfds_ = new struct pollfd[pollfdCapacity_];
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}
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PollEventPoll::~PollEventPoll()
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{
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delete [] pollfds_;
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}
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void PollEventPoll::poll(const struct timeval& tv)
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{
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// timeout is millisec
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int timeout = tv.tv_sec*1000+tv.tv_usec/1000;
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int res;
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while((res = ::poll(pollfds_, pollfdNum_, timeout)) == -1 &&
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errno == EINTR);
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if(res > 0) {
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SharedHandle<KSocketEntry> se(new KSocketEntry(0));
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for(struct pollfd* first = pollfds_, *last = pollfds_+pollfdNum_;
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first != last; ++first) {
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if(first->revents) {
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se->setSocket(first->fd);
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std::deque<SharedHandle<KSocketEntry> >::iterator itr =
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std::lower_bound(socketEntries_.begin(), socketEntries_.end(), se,
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DerefLess<SharedHandle<KSocketEntry> >());
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if(itr != socketEntries_.end() && *(*itr) == *se) {
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(*itr)->processEvents(first->revents);
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} else {
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A2_LOG_DEBUG(fmt("Socket %d is not found in SocketEntries.",
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first->fd));
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}
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}
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}
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} else if(res == -1) {
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int errNum = errno;
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A2_LOG_INFO(fmt("poll error: %s", util::safeStrerror(errNum).c_str()));
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}
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#ifdef ENABLE_ASYNC_DNS
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// It turns out that we have to call ares_process_fd before ares's
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// own timeout and ares may create new sockets or closes socket in
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// their API. So we call ares_process_fd for all ares_channel and
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// re-register their sockets.
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for(std::deque<SharedHandle<KAsyncNameResolverEntry> >::iterator i =
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nameResolverEntries_.begin(), eoi = nameResolverEntries_.end();
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i != eoi; ++i) {
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(*i)->processTimeout();
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(*i)->removeSocketEvents(this);
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(*i)->addSocketEvents(this);
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}
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#endif // ENABLE_ASYNC_DNS
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// TODO timeout of name resolver is determined in Command(AbstractCommand,
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// DHTEntryPoint...Command)
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}
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int PollEventPoll::translateEvents(EventPoll::EventType events)
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{
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int newEvents = 0;
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if(EventPoll::EVENT_READ&events) {
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newEvents |= IEV_READ;
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}
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if(EventPoll::EVENT_WRITE&events) {
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newEvents |= IEV_WRITE;
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}
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if(EventPoll::EVENT_ERROR&events) {
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newEvents |= IEV_ERROR;
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}
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if(EventPoll::EVENT_HUP&events) {
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newEvents |= IEV_HUP;
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}
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return newEvents;
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}
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bool PollEventPoll::addEvents
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(sock_t socket, const PollEventPoll::KEvent& event)
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{
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SharedHandle<KSocketEntry> socketEntry(new KSocketEntry(socket));
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std::deque<SharedHandle<KSocketEntry> >::iterator i =
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std::lower_bound(socketEntries_.begin(), socketEntries_.end(), socketEntry,
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DerefLess<SharedHandle<KSocketEntry> >());
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if(i != socketEntries_.end() && *(*i) == *socketEntry) {
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event.addSelf(*i);
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for(struct pollfd* first = pollfds_, *last = pollfds_+pollfdNum_;
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first != last; ++first) {
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if(first->fd == socket) {
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*first = (*i)->getEvents();
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break;
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}
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}
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} else {
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socketEntries_.insert(i, socketEntry);
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event.addSelf(socketEntry);
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if(pollfdCapacity_ == pollfdNum_) {
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pollfdCapacity_ *= 2;
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struct pollfd* newPollfds = new struct pollfd[pollfdCapacity_];
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memcpy(newPollfds, pollfds_, pollfdNum_*sizeof(struct pollfd));
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delete [] pollfds_;
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pollfds_ = newPollfds;
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}
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pollfds_[pollfdNum_] = socketEntry->getEvents();
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++pollfdNum_;
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}
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return true;
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}
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bool PollEventPoll::addEvents
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(sock_t socket, Command* command, EventPoll::EventType events)
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{
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int pollEvents = translateEvents(events);
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return addEvents(socket, KCommandEvent(command, pollEvents));
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}
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#ifdef ENABLE_ASYNC_DNS
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bool PollEventPoll::addEvents
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(sock_t socket, Command* command, int events,
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const SharedHandle<AsyncNameResolver>& rs)
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{
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return addEvents(socket, KADNSEvent(rs, command, socket, events));
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}
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#endif // ENABLE_ASYNC_DNS
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bool PollEventPoll::deleteEvents
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(sock_t socket, const PollEventPoll::KEvent& event)
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{
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SharedHandle<KSocketEntry> socketEntry(new KSocketEntry(socket));
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std::deque<SharedHandle<KSocketEntry> >::iterator i =
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std::lower_bound(socketEntries_.begin(), socketEntries_.end(), socketEntry,
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DerefLess<SharedHandle<KSocketEntry> >());
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if(i != socketEntries_.end() && *(*i) == *socketEntry) {
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event.removeSelf(*i);
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for(struct pollfd* first = pollfds_, *last = pollfds_+pollfdNum_;
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first != last; ++first) {
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if(first->fd == socket) {
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if((*i)->eventEmpty()) {
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if(pollfdNum_ >= 2) {
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*first = *(last-1);
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}
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--pollfdNum_;
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socketEntries_.erase(i);
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} else {
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*first = (*i)->getEvents();
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}
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break;
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}
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}
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return true;
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} else {
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A2_LOG_DEBUG(fmt("Socket %d is not found in SocketEntries.", socket));
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return false;
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}
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}
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#ifdef ENABLE_ASYNC_DNS
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bool PollEventPoll::deleteEvents
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(sock_t socket, Command* command, const SharedHandle<AsyncNameResolver>& rs)
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{
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return deleteEvents(socket, KADNSEvent(rs, command, socket, 0));
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}
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#endif // ENABLE_ASYNC_DNS
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bool PollEventPoll::deleteEvents
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(sock_t socket, Command* command, EventPoll::EventType events)
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{
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int pollEvents = translateEvents(events);
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return deleteEvents(socket, KCommandEvent(command, pollEvents));
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}
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#ifdef ENABLE_ASYNC_DNS
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bool PollEventPoll::addNameResolver
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(const SharedHandle<AsyncNameResolver>& resolver, Command* command)
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{
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SharedHandle<KAsyncNameResolverEntry> entry
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(new KAsyncNameResolverEntry(resolver, command));
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std::deque<SharedHandle<KAsyncNameResolverEntry> >::iterator itr =
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std::find_if(nameResolverEntries_.begin(), nameResolverEntries_.end(),
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derefEqual(entry));
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if(itr == nameResolverEntries_.end()) {
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nameResolverEntries_.push_back(entry);
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entry->addSocketEvents(this);
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return true;
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} else {
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return false;
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}
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}
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bool PollEventPoll::deleteNameResolver
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(const SharedHandle<AsyncNameResolver>& resolver, Command* command)
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{
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SharedHandle<KAsyncNameResolverEntry> entry
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(new KAsyncNameResolverEntry(resolver, command));
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std::deque<SharedHandle<KAsyncNameResolverEntry> >::iterator itr =
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std::find_if(nameResolverEntries_.begin(), nameResolverEntries_.end(),
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derefEqual(entry));
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if(itr == nameResolverEntries_.end()) {
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return false;
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} else {
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(*itr)->removeSocketEvents(this);
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nameResolverEntries_.erase(itr);
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return true;
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}
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}
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#endif // ENABLE_ASYNC_DNS
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} // namespace aria2
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