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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2013 Nils Maier
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#ifndef D_LIBUV_EVENT_POLL_H
#define D_LIBUV_EVENT_POLL_H
#include "EventPoll.h"
#include <map>
#include <set>
#include <uv.h>
#include "Event.h"
#include "a2functional.h"
#ifdef ENABLE_ASYNC_DNS
#include "AsyncNameResolver.h"
#endif // ENABLE_ASYNC_DNS
namespace aria2 {
class LibuvEventPoll : public EventPoll {
private:
class KSocketEntry;
typedef Event<KSocketEntry> KEvent;
typedef CommandEvent<KSocketEntry, LibuvEventPoll> KCommandEvent;
typedef ADNSEvent<KSocketEntry, LibuvEventPoll> KADNSEvent;
typedef AsyncNameResolverEntry<LibuvEventPoll> KAsyncNameResolverEntry;
friend class AsyncNameResolverEntry<LibuvEventPoll>;
friend int accumulateEvent(int events, const KEvent& event);
class KSocketEntry: public SocketEntry<KCommandEvent, KADNSEvent> {
public:
KSocketEntry(sock_t socket);
KSocketEntry(const KSocketEntry&) = delete;
KSocketEntry(KSocketEntry&&) = default;
int getEvents() const;
};
class KPoll {
private:
LibuvEventPoll *eventer_;
KSocketEntry *entry_;
uv_poll_t handle_;
static void poll_callback(uv_poll_t* handle, int status, int events) {
auto poll = static_cast<KPoll*>(handle->data);
poll->eventer_->pollCallback(poll, status, events);
}
static void close_callback(uv_handle_t* handle) {
delete static_cast<KPoll*>(handle->data);
}
public:
inline KPoll(LibuvEventPoll* eventer, KSocketEntry* entry, sock_t sock)
: eventer_(eventer), entry_(entry)
{
uv_poll_init_socket(eventer->loop_, &handle_, sock);
handle_.data = this;
}
inline void start() {
uv_poll_start(&handle_, entry_->getEvents() & IEV_RW, poll_callback);
}
inline void stop() {
uv_poll_stop(&handle_);
}
inline void processEvents(int events) {
entry_->processEvents(events);
}
inline void close() {
stop();
uv_close((uv_handle_t*)&handle_, close_callback);
}
};
typedef std::map<sock_t, KSocketEntry> KSocketEntrySet;
typedef std::map<sock_t, KPoll*> KPolls;
#ifdef ENABLE_ASYNC_DNS
typedef std::map<std::pair<AsyncNameResolver*, Command*>,
KAsyncNameResolverEntry> KAsyncNameResolverEntrySet;
#endif // ENABLE_ASYNC_DNS
uv_loop_t* loop_;
KSocketEntrySet socketEntries_;
KPolls polls_;
#ifdef ENABLE_ASYNC_DNS
KAsyncNameResolverEntrySet nameResolverEntries_;
#endif // ENABLE_ASYNC_DNS
bool addEvents(sock_t socket, const KEvent& event);
bool deleteEvents(sock_t socket, const KEvent& event);
void pollCallback(KPoll *poll, int status, int events);
#ifdef ENABLE_ASYNC_DNS
bool addEvents(sock_t socket, Command* command, int events,
const std::shared_ptr<AsyncNameResolver>& rs);
bool deleteEvents(sock_t socket, Command* command,
const std::shared_ptr<AsyncNameResolver>& rs);
#endif
static int translateEvents(EventPoll::EventType events);
public:
LibuvEventPoll();
virtual ~LibuvEventPoll();
bool good() const { return loop_; }
virtual void poll(const struct timeval& tv) CXX11_OVERRIDE;
virtual bool addEvents(sock_t socket,
Command* command, EventPoll::EventType events)
CXX11_OVERRIDE;
virtual bool deleteEvents(sock_t socket,
Command* command, EventPoll::EventType events)
CXX11_OVERRIDE;
#ifdef ENABLE_ASYNC_DNS
virtual bool addNameResolver(const std::shared_ptr<AsyncNameResolver>& resolver,
Command* command) CXX11_OVERRIDE;
virtual bool deleteNameResolver(
const std::shared_ptr<AsyncNameResolver>& resolver, Command* command)
CXX11_OVERRIDE;
#endif // ENABLE_ASYNC_DNS
static const int IEV_READ = UV_READABLE;
static const int IEV_WRITE = UV_WRITABLE;
static const int IEV_RW = UV_READABLE | UV_WRITABLE;
// Make sure these do not interfere with the uv_poll API later.
static const int IEV_ERROR = 128;
static const int IEV_HUP = 255;
};
} // namespace aria2
#endif // D_LIBUV_EVENT_POLL_H
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