Fix the Windows events implementation in the Posix driver.

source/eventcore/drivers/posix.d

@@ -54,7 +54,7 @@ final class PosixEventDriver(Loop : PosixEventLoop) : EventDriver {
 
 	private {
 		alias CoreDriver = PosixEventDriverCore!(Loop, TimerDriver, EventsDriver);
-		alias EventsDriver = PosixEventDriverEvents!Loop;
+		alias EventsDriver = PosixEventDriverEvents!(Loop, SocketsDriver);
 		version (linux) alias SignalsDriver = SignalFDEventDriverSignals!Loop;
 		else alias SignalsDriver = DummyEventDriverSignals!Loop;
 		alias TimerDriver = LoopTimeoutTimerDriver;
@@ -80,11 +80,11 @@ final class PosixEventDriver(Loop : PosixEventLoop) : EventDriver {
 	this()
 	{
 		m_loop = new Loop;
-		m_events = new EventsDriver(m_loop);
+		m_sockets = new SocketsDriver(m_loop);
+		m_events = new EventsDriver(m_loop, m_sockets);
 		m_signals = new SignalsDriver(m_loop);
 		m_timers = new TimerDriver;
 		m_core = new CoreDriver(m_loop, m_timers, m_events);
-		m_sockets = new SocketsDriver(m_loop);
 		m_dns = new DNSDriver(m_events, m_signals);
 		m_files = new FileDriver(m_events);
 		m_watchers = new WatcherDriver(m_loop);
@@ -1134,20 +1134,22 @@ private void passToDNSCallback()(DNSLookupID id, scope DNSLookupCallback cb, DNS
 	} catch (Exception e) assert(false, e.msg);
 }
 
-final class PosixEventDriverEvents(Loop : PosixEventLoop) : EventDriverEvents {
+final class PosixEventDriverEvents(Loop : PosixEventLoop, Sockets : EventDriverSockets) : EventDriverEvents {
 @safe: /*@nogc:*/ nothrow:
 	private {
 		Loop m_loop;
+		Sockets m_sockets;
 		version (Windows) {
-			static struct ES {
-				uint refCount;
-				EventSlot slot;
-			}
-			ES[EventID] m_events;
+			EventSlot[DatagramSocketFD] m_events;
+			ubyte[long.sizeof] m_buf;
 		}
 	}
 
-	this(Loop loop) { m_loop = loop; }
+	this(Loop loop, Sockets sockets)
+	{
+		m_loop = loop;
+		m_sockets = sockets;
+	}
 
 	final override EventID create()
 	{
@@ -1159,25 +1161,27 @@ final class PosixEventDriverEvents(Loop : PosixEventLoop) : EventDriverEvents {
 			m_loop.setNotifyCallback!(EventType.read)(id, &onEvent);
 			return id;
 		} else version (Windows) {
-			auto h = () @trusted { return CreateEvent(null, false, false, null); } ();
-			auto id = EventID(cast(int)h);
-			m_events[id] = ES(1, EventSlot(new ConsumableQueue!EventCallback)); // FIXME: avoid dynamic memory allocation
-			return id;
+			auto addr = new InternetAddress(0x7F000001, 0);
+			auto s = m_sockets.createDatagramSocket(addr, addr);
+			if (s == DatagramSocketFD.invalid) print("oops");
+			m_sockets.receive(s, m_buf, IOMode.once, &onSocketData);
+			m_events[s] = EventSlot(new ConsumableQueue!EventCallback); // FIXME: avoid dynamic memory allocation
+			return cast(EventID)s;
 		} else assert(false, "OS not supported!");	
 	}
 
 	final override void trigger(EventID event, bool notify_all = true)
 	{
-		assert(event < m_loop.m_fds.length, "Invalid event ID passed to triggerEvent.");
+		auto slot = &getSlot(event);
 		if (notify_all) {
 			//log("emitting only for this thread (%s waiters)", m_fds[event].waiters.length);
-			foreach (w; getSlot(event).waiters.consume) {
+			foreach (w; slot.waiters.consume) {
 				//log("emitting waiter %s %s", cast(void*)w.funcptr, w.ptr);
 				w(event);
 			}
 		} else {
-			if (!getSlot(event).waiters.empty)
-				getSlot(event).waiters.consumeOne()(event);
+			if (!slot.waiters.empty)
+				slot.waiters.consumeOne()(event);
 		}
 	}
 
@@ -1189,7 +1193,10 @@ final class PosixEventDriverEvents(Loop : PosixEventLoop) : EventDriverEvents {
 		long one = 1;
 		//log("emitting for all threads");
 		if (notify_all) atomicStore(thisus.getSlot(event).triggerAll, true);
-		() @trusted { .write(event, &one, one.sizeof); } ();
+		version (Windows)
+			(cast(Sockets)m_sockets).send(cast(DatagramSocketFD)event, cast(ubyte[])m_buf, IOMode.once, null, &onSocketDataSent);
+		else
+			() @trusted { .write(event, &one, one.sizeof); } ();
 	}
 
 	final override void wait(EventID event, EventCallback on_event)
@@ -1217,6 +1224,17 @@ final class PosixEventDriverEvents(Loop : PosixEventLoop) : EventDriverEvents {
 		trigger(event, all);
 	}
 
+	version (Windows) {
+		private void onSocketDataSent(DatagramSocketFD s, IOStatus status, size_t, scope RefAddress)
+		{
+		}
+		private void onSocketData(DatagramSocketFD s, IOStatus, size_t, scope RefAddress)
+		{
+			onEvent(cast(EventID)s);
+			m_sockets.receive(s, m_buf, IOMode.once, &onSocketData);
+		}
+	}
+
 	final override void addRef(EventID descriptor)
 	{
 		assert(getRC(descriptor) > 0, "Adding reference to unreferenced event FD.");
@@ -1226,16 +1244,22 @@ final class PosixEventDriverEvents(Loop : PosixEventLoop) : EventDriverEvents {
 	final override bool releaseRef(EventID descriptor)
 	{
 		assert(getRC(descriptor) > 0, "Releasing reference to unreferenced event FD.");
-		if (--getRC(descriptor) == 0) {
+		void destroy() {
 			() @trusted nothrow {
 				scope (failure) assert(false);
-				destroy(getSlot(descriptor).waiters);
+				.destroy(getSlot(descriptor).waiters);
 				assert(getSlot(descriptor).waiters is null);
 			} ();
-			version (Windows) {
-				() @trusted { CloseHandle(cast(HANDLE)cast(int)descriptor); } ();
-				m_events.remove(descriptor);
-			} else {
+		}
+		version (Windows) {
+			if (!m_sockets.releaseRef(cast(DatagramSocketFD)descriptor)) {
+				destroy();
+				m_events.remove(cast(DatagramSocketFD)descriptor);
+				return false;
+			}
+		} else {
+			if (--getRC(descriptor) == 0) {
+				destroy();
 				m_loop.unregisterFD(descriptor);
 				m_loop.clearFD(descriptor);
 				close(descriptor);
@@ -1248,8 +1272,8 @@ final class PosixEventDriverEvents(Loop : PosixEventLoop) : EventDriverEvents {
 	private ref EventSlot getSlot(EventID id)
 	{
 		version (Windows) {
-			assert(id in m_events, "Invalid event ID.");
-			return m_events[id].slot;
+			assert(cast(DatagramSocketFD)id in m_events, "Invalid event ID.");
+			return m_events[cast(DatagramSocketFD)id];
 		} else {
 			assert(id < m_loop.m_fds.length, "Invalid event ID.");
 			return m_loop.m_fds[id].event();
@@ -1258,11 +1282,7 @@ final class PosixEventDriverEvents(Loop : PosixEventLoop) : EventDriverEvents {
 
 	private ref uint getRC(EventID id)
 	{
-		version (Windows) {
-			return m_events[id].refCount;
-		} else {
-			return m_loop.m_fds[id].common.refCount;
-		}
+		return m_loop.m_fds[id].common.refCount;
 	}
 }
 

tests/0-event.d

@@ -13,6 +13,8 @@ import core.thread : Thread;
 bool s_done;
 shared EventDriverEvents ss_evts;
 
+// TODO: adjust to detect premature loop exit if only an event wait is active (no timer)
+
 void test(bool notify_all)
 {
 	auto id = eventDriver.events.create();