ZeroconfAvahi: integrate into the EventLoop

Finally fixes the regression by commit c1f4f1fd.

1 files changed, 147 insertions, 0 deletions

diff --git a/src/AvahiPoll.cxx b/src/AvahiPoll.cxx
new file mode 100644
index 000000000..f3e2f596c
--- /dev/null
+++ b/src/AvahiPoll.cxx
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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.
+ */
+
+#include "config.h"
+#include "AvahiPoll.hxx"
+#include "event/Loop.hxx"
+#include "event/SocketMonitor.hxx"
+#include "event/TimeoutMonitor.hxx"
+
+static unsigned
+FromAvahiWatchEvent(AvahiWatchEvent e)
+{
+	return (e & AVAHI_WATCH_IN ? SocketMonitor::READ : 0) |
+		(e & AVAHI_WATCH_OUT ? SocketMonitor::WRITE : 0) |
+		(e & AVAHI_WATCH_ERR ? SocketMonitor::ERROR : 0) |
+		(e & AVAHI_WATCH_HUP ? SocketMonitor::HANGUP : 0);
+}
+
+static AvahiWatchEvent
+ToAvahiWatchEvent(unsigned e)
+{
+	return AvahiWatchEvent((e & SocketMonitor::READ ? AVAHI_WATCH_IN : 0) |
+			       (e & SocketMonitor::WRITE ? AVAHI_WATCH_OUT : 0) |
+			       (e & SocketMonitor::ERROR ? AVAHI_WATCH_ERR : 0) |
+			       (e & SocketMonitor::HANGUP ? AVAHI_WATCH_HUP : 0));
+}
+
+struct AvahiWatch final : private SocketMonitor {
+private:
+	const AvahiWatchCallback callback;
+	void *const userdata;
+
+	AvahiWatchEvent received;
+
+public:
+	AvahiWatch(int _fd, AvahiWatchEvent _event,
+		   AvahiWatchCallback _callback, void *_userdata,
+		   EventLoop &_loop)
+		:SocketMonitor(_fd, _loop),
+		 callback(_callback), userdata(_userdata),
+		 received(AvahiWatchEvent(0)) {
+		Schedule(FromAvahiWatchEvent(_event));
+	}
+
+	static void WatchUpdate(AvahiWatch *w, AvahiWatchEvent event) {
+		w->Schedule(FromAvahiWatchEvent(event));
+	}
+
+	static AvahiWatchEvent WatchGetEvents(AvahiWatch *w) {
+		return w->received;
+	}
+
+	static void WatchFree(AvahiWatch *w) {
+		delete w;
+	}
+
+protected:
+	virtual bool OnSocketReady(unsigned flags) {
+		received = ToAvahiWatchEvent(flags);
+		callback(this, Get(), received, userdata);
+		received = AvahiWatchEvent(0);
+		return true;
+	}
+};
+
+static constexpr unsigned
+TimevalToMS(const timeval &tv)
+{
+	return tv.tv_sec * 1000 + (tv.tv_usec + 500) / 1000;
+}
+
+struct AvahiTimeout final : private TimeoutMonitor {
+private:
+	const AvahiTimeoutCallback callback;
+	void *const userdata;
+
+public:
+	AvahiTimeout(const struct timeval *tv,
+		     AvahiTimeoutCallback _callback, void *_userdata,
+		     EventLoop &_loop)
+		:TimeoutMonitor(_loop),
+		 callback(_callback), userdata(_userdata) {
+		if (tv != nullptr)
+			Schedule(TimevalToMS(*tv));
+	}
+
+	static void TimeoutUpdate(AvahiTimeout *t, const struct timeval *tv) {
+		if (tv != nullptr)
+			t->Schedule(TimevalToMS(*tv));
+		else
+			t->Cancel();
+	}
+
+	static void TimeoutFree(AvahiTimeout *t) {
+		delete t;
+	}
+
+protected:
+	virtual void OnTimeout() {
+		callback(this, userdata);
+	}
+};
+
+MyAvahiPoll::MyAvahiPoll(EventLoop &_loop):event_loop(_loop)
+{
+	watch_new = WatchNew;
+	watch_update = AvahiWatch::WatchUpdate;
+	watch_get_events = AvahiWatch::WatchGetEvents;
+	watch_free = AvahiWatch::WatchFree;
+	timeout_new = TimeoutNew;
+	timeout_update = AvahiTimeout::TimeoutUpdate;
+	timeout_free = AvahiTimeout::TimeoutFree;
+}
+
+AvahiWatch *
+MyAvahiPoll::WatchNew(const AvahiPoll *api, int fd, AvahiWatchEvent event,
+		      AvahiWatchCallback callback, void *userdata) {
+	const MyAvahiPoll &poll = *(const MyAvahiPoll *)api;
+
+	return new AvahiWatch(fd, event, callback, userdata,
+			      poll.event_loop);
+}
+
+AvahiTimeout *
+MyAvahiPoll::TimeoutNew(const AvahiPoll *api, const struct timeval *tv,
+			AvahiTimeoutCallback callback, void *userdata) {
+	const MyAvahiPoll &poll = *(const MyAvahiPoll *)api;
+
+	return new AvahiTimeout(tv, callback, userdata,
+				poll.event_loop);
+}