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+/* <!-- 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 "KqueueEventPoll.h"
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+
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+#include <cstring>
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+#include <algorithm>
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+#include <numeric>
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+
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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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+
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+#ifdef KEVENT_UDATA_INTPTR_T
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+# define PTR_TO_UDATA(X) (reinterpret_cast<intptr_t>(X))
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+#else // !KEVENT_UDATA_INTPTR_T
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+# define PTR_TO_UDATA(X) (X)
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+#endif // !KEVENT_UDATA_INTPTR_T
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+
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+namespace aria2 {
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+
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+KqueueEventPoll::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 KqueueEventPoll::KEvent& event)
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+{
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+ return events|event.getEvents();
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+}
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+
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+size_t KqueueEventPoll::KSocketEntry::getEvents
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+(struct kevent* eventlist)
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+{
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+ int events;
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+#ifdef ENABLE_ASYNC_DNS
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+ 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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+ 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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+ EV_SET(&eventlist[0], _socket, EVFILT_READ,
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+ EV_ADD|((events&KqueueEventPoll::IEV_READ)?EV_ENABLE:EV_DISABLE),
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+ 0, 0, PTR_TO_UDATA(this));
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+ EV_SET(&eventlist[1], _socket, EVFILT_WRITE,
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+ EV_ADD|((events&KqueueEventPoll::IEV_WRITE)?EV_ENABLE:EV_DISABLE),
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+ 0, 0, PTR_TO_UDATA(this));
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+ return 2;
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+}
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+
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+KqueueEventPoll::KqueueEventPoll():
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+ _kqEventsSize(KQUEUE_EVENTS_MAX),
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+ _kqEvents(new struct kevent[_kqEventsSize]),
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+ _logger(LogFactory::getInstance())
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+{
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+ _kqfd = kqueue();
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+}
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+
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+KqueueEventPoll::~KqueueEventPoll()
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+{
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+ if(_kqfd != -1) {
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+ int r;
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+ while((r = close(_kqfd)) == -1 && errno == EINTR);
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+ if(r == -1) {
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+ _logger->error("Error occurred while closing kqueue file descriptor"
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+ " %d: %s",
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+ _kqfd, strerror(errno));
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+ }
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+ }
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+ delete [] _kqEvents;
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+}
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+
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+bool KqueueEventPoll::good() const
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+{
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+ return _kqfd != -1;
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+}
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+
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+void KqueueEventPoll::poll(const struct timeval& tv)
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+{
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+ struct timespec timeout = { tv.tv_sec, tv.tv_usec*1000 };
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+ int res;
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+ while((res = kevent(_kqfd, _kqEvents, 0, _kqEvents, _kqEventsSize, &timeout))
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+ == -1 && errno == EINTR);
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+ if(res > 0) {
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+ for(int i = 0; i < res; ++i) {
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+ KSocketEntry* p = reinterpret_cast<KSocketEntry*>(_kqEvents[i].udata);
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+ int events = 0;
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+ int filter = _kqEvents[i].filter;
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+ if(filter == EVFILT_READ) {
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+ events = KqueueEventPoll::IEV_READ;
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+ } else if(filter == EVFILT_WRITE) {
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+ events = KqueueEventPoll::IEV_WRITE;
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+ }
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+ p->processEvents(events);
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+ }
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+ }
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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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+
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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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+
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+static int 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 |= KqueueEventPoll::IEV_READ;
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+ }
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+ if(EventPoll::EVENT_WRITE&events) {
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+ newEvents |= KqueueEventPoll::IEV_WRITE;
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+ }
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+ return newEvents;
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+}
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+
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+bool KqueueEventPoll::addEvents
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+(sock_t socket, const KqueueEventPoll::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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+ int r = 0;
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+ struct timespec zeroTimeout = { 0, 0 };
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+ struct kevent changelist[2];
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+ size_t n;
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+ if(i != _socketEntries.end() && (*i) == socketEntry) {
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+ event.addSelf(*i);
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+ n = (*i)->getEvents(changelist);
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+ } else {
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+ _socketEntries.insert(i, socketEntry);
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+ if(_socketEntries.size() > _kqEventsSize) {
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+ _kqEventsSize *= 2;
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+ delete [] _kqEvents;
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+ _kqEvents = new struct kevent[_kqEventsSize];
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+ }
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+ event.addSelf(socketEntry);
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+ n = socketEntry->getEvents(changelist);
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+ }
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+ r = kevent(_kqfd, changelist, n, changelist, 0, &zeroTimeout);
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+ if(r == -1) {
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+ if(_logger->debug()) {
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+ _logger->debug("Failed to add socket event %d:%s",
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+ socket, strerror(errno));
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+ }
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+ return false;
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+ } else {
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+ return true;
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+ }
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+}
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+
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+bool KqueueEventPoll::addEvents(sock_t socket, Command* command,
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+ EventPoll::EventType events)
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+{
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+ int kqEvents = translateEvents(events);
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+ return addEvents(socket, KCommandEvent(command, kqEvents));
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+}
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+
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+#ifdef ENABLE_ASYNC_DNS
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+bool KqueueEventPoll::addEvents(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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+
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+bool KqueueEventPoll::deleteEvents(sock_t socket,
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+ const KqueueEventPoll::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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+ if(i != _socketEntries.end() && (*i) == socketEntry) {
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+ event.removeSelf(*i);
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+ int r = 0;
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+ struct timespec zeroTimeout = { 0, 0 };
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+ struct kevent changelist[2];
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+ size_t n = (*i)->getEvents(changelist);
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+ r = kevent(_kqfd, changelist, n, changelist, 0, &zeroTimeout);
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+ if((*i)->eventEmpty()) {
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+ _socketEntries.erase(i);
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+ }
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+ if(r == -1) {
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+ if(_logger->debug()) {
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+ _logger->debug("Failed to delete socket event:%s", strerror(errno));
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+ }
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+ return false;
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+ } else {
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+ return true;
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+ }
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+ } else {
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+ if(_logger->debug()) {
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+ _logger->debug("Socket %d is not found in SocketEntries.", socket);
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+ }
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+ return false;
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+ }
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+}
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+
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+#ifdef ENABLE_ASYNC_DNS
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+bool KqueueEventPoll::deleteEvents(sock_t socket, Command* command,
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+ 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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+
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+bool KqueueEventPoll::deleteEvents(sock_t socket, Command* command,
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+ EventPoll::EventType events)
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+{
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+ int kqEvents = translateEvents(events);
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+ return deleteEvents(socket, KCommandEvent(command, kqEvents));
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+}
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+
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+#ifdef ENABLE_ASYNC_DNS
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+bool KqueueEventPoll::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(_nameResolverEntries.begin(), _nameResolverEntries.end(), 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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+
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+bool KqueueEventPoll::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(_nameResolverEntries.begin(), _nameResolverEntries.end(), 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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+
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+} // namespace aria2
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Tatsuhiro Tsujikawa