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@@ -0,0 +1,297 @@
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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 "PortEventPoll.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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+namespace aria2 {
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+
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+PortEventPoll::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 PortEventPoll::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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+PortEventPoll::A2PortEvent PortEventPoll::KSocketEntry::getEvents()
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+{
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+ A2PortEvent portEvent;
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+ portEvent.socketEntry = this;
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+#ifdef ENABLE_ASYNC_DNS
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+ portEvent.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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+ portEvent.events =
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+ std::accumulate(_commandEvents.begin(), _commandEvents.end(), 0,
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+ accumulateEvent);
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+
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+#endif // !ENABLE_ASYNC_DNS
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+ return portEvent;
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+}
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+
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+PortEventPoll::PortEventPoll():
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+ _portEventsSize(PORT_EVENTS_SIZE),
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+ _portEvents(new port_event_t[_portEventsSize]),
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+ _logger(LogFactory::getInstance())
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+{
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+ _port = port_create();
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+}
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+
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+PortEventPoll::~PortEventPoll()
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+{
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+ if(_port != -1) {
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+ int r;
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+ while((r = close(_port)) == -1 && errno == EINTR);
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+ if(r == -1) {
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+ _logger->error("Error occurred while closing port %d: %s",
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+ _port, strerror(errno));
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+ }
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+ }
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+ delete [] _portEvents;
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+}
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+
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+bool PortEventPoll::good() const
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+{
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+ return _port != -1;
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+}
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+
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+void PortEventPoll::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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+ uint_t nget = 1;
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+ // If port_getn was interrupted by signal, it can consume events but
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+ // not updat nget!. For this very annoying bug, we have to check
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+ // actually event is filled or not.
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+ _portEvents[0].portev_user = (void*)-1;
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+ res = port_getn(_port, _portEvents, _portEventsSize, &nget, &timeout);
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+ if(res == 0 ||
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+ (res == -1 && (errno == ETIME || errno == EINTR) &&
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+ _portEvents[0].portev_user != (void*)-1)) {
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+ if(_logger->debug()) {
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+ _logger->debug("nget=%u", nget);
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+ }
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+ for(uint_t i = 0; i < nget; ++i) {
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+ const port_event_t& pev = _portEvents[i];
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+ KSocketEntry* p = reinterpret_cast<KSocketEntry*>(pev.portev_user);
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+ p->processEvents(pev.portev_events);
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+ int r = port_associate(_port, PORT_SOURCE_FD, pev.portev_object,
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+ p->getEvents().events, p);
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+ if(r == -1) {
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+ _logger->error("port_associate failed for file descriptor %d: cause %s",
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+ pev.portev_object, strerror(errno));
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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 |= PortEventPoll::IEV_READ;
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+ }
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+ if(EventPoll::EVENT_WRITE&events) {
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+ newEvents |= PortEventPoll::IEV_WRITE;
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+ }
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+ if(EventPoll::EVENT_ERROR&events) {
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+ newEvents |= PortEventPoll::IEV_ERROR;
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+ }
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+ if(EventPoll::EVENT_HUP&events) {
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+ newEvents |= PortEventPoll::IEV_HUP;
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+ }
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+ return newEvents;
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+}
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+
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+bool PortEventPoll::addEvents(sock_t socket,
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+ const PortEventPoll::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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+ if(i != _socketEntries.end() && (*i) == socketEntry) {
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+ event.addSelf(*i);
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+ A2PortEvent pv = (*i)->getEvents();
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+ r = port_associate(_port, PORT_SOURCE_FD, (*i)->getSocket(),
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+ pv.events, pv.socketEntry);
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+ } else {
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+ _socketEntries.insert(i, socketEntry);
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+ if(_socketEntries.size() > _portEventsSize) {
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+ _portEventsSize *= 2;
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+ delete [] _portEvents;
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+ _portEvents = new port_event_t[_portEventsSize];
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+ }
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+ event.addSelf(socketEntry);
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+ A2PortEvent pv = socketEntry->getEvents();
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+ r = port_associate(_port, PORT_SOURCE_FD, socketEntry->getSocket(),
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+ pv.events, pv.socketEntry);
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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 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 PortEventPoll::addEvents(sock_t socket, Command* command,
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+ EventPoll::EventType events)
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+{
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+ int portEvents = translateEvents(events);
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+ return addEvents(socket, KCommandEvent(command, portEvents));
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+}
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+
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+#ifdef ENABLE_ASYNC_DNS
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+bool PortEventPoll::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 PortEventPoll::deleteEvents(sock_t socket,
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+ const PortEventPoll::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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+ if((*i)->eventEmpty()) {
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+ r = port_dissociate(_port, PORT_SOURCE_FD, (*i)->getSocket());
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+ _socketEntries.erase(i);
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+ } else {
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+ A2PortEvent pv = (*i)->getEvents();
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+ r = port_associate(_port, PORT_SOURCE_FD, (*i)->getSocket(),
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+ pv.events, pv.socketEntry);
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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 PortEventPoll::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 PortEventPoll::deleteEvents(sock_t socket, Command* command,
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+ EventPoll::EventType events)
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+{
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+ int portEvents = translateEvents(events);
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+ return deleteEvents(socket, KCommandEvent(command, portEvents));
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+}
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+
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+#ifdef ENABLE_ASYNC_DNS
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+bool PortEventPoll::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 PortEventPoll::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