Implement basic event processing and timers for the WinAPI driver.

README.md

@@ -13,7 +13,7 @@ Driver            | Linux | Windows | OS X | FreeBSD
 ------------------|-------|---------|------|--------
 SelectEventDriver | yes   | yes     | yes¹ | yes¹
 EpollEventDriver  | yes   | no      | no   | no
-WinAPIEventDriver | no    | yes¹    | no   | no
+WinAPIEventDriver | no    | yes     | no   | no
 KqueueEventDriver | no    | no      | yes¹ | yes¹
 
 ¹ planned, but not currenly implemented

source/eventcore/drivers/winapi.d

@@ -10,41 +10,49 @@ module eventcore.drivers.winapi;
 version (Windows):
 
 import eventcore.driver;
+import eventcore.drivers.timer;
 import std.socket : Address;
 import core.time : Duration;
+import core.sys.windows.windows;
+import core.sys.windows.winsock2;
 
 
 final class WinAPIEventDriver : EventDriver {
-@safe: /*@nogc:*/ nothrow:
-
 	private {
 		WinAPIEventDriverCore m_core;
 		WinAPIEventDriverFiles m_files;
 		WinAPIEventDriverSockets m_sockets;
 		WinAPIEventDriverDNS m_dns;
-		WinAPIEventDriverTimers m_timers;
+		LoopTimeoutTimerDriver m_timers;
 		WinAPIEventDriverEvents m_events;
 		WinAPIEventDriverSignals m_signals;
 		WinAPIEventDriverWatchers m_watchers;
 	}
 
 	this()
-	{
-		m_core = new WinAPIEventDriverCore();
+	@safe {
+		import std.exception : enforce;
+
+		WSADATA wd;
+		enforce(() @trusted { return WSAStartup(0x0202, &wd); } () == 0, "Failed to initialize WinSock");
+
+		m_events = new WinAPIEventDriverEvents();
+		m_signals = new WinAPIEventDriverSignals();
+		m_timers = new LoopTimeoutTimerDriver();
+		m_core = new WinAPIEventDriverCore(m_timers);
 		m_files = new WinAPIEventDriverFiles();
 		m_sockets = new WinAPIEventDriverSockets();
 		m_dns = new WinAPIEventDriverDNS();
-		m_timers = new WinAPIEventDriverTimers();
-		m_events = new WinAPIEventDriverEvents();
-		m_signals = new WinAPIEventDriverSignals();
 		m_watchers = new WinAPIEventDriverWatchers();
 	}
 
+@safe: /*@nogc:*/ nothrow:
+
 	override @property WinAPIEventDriverCore core() { return m_core; }
 	override @property WinAPIEventDriverFiles files() { return m_files; }
 	override @property WinAPIEventDriverSockets sockets() { return m_sockets; }
 	override @property WinAPIEventDriverDNS dns() { return m_dns; }
-	override @property WinAPIEventDriverTimers timers() { return m_timers; }
+	override @property LoopTimeoutTimerDriver timers() { return m_timers; }
 	override @property WinAPIEventDriverEvents events() { return m_events; }
 	override @property shared(WinAPIEventDriverEvents) events() shared { return m_events; }
 	override @property WinAPIEventDriverSignals signals() { return m_signals; }
@@ -52,30 +60,78 @@ final class WinAPIEventDriver : EventDriver {
 
 	override void dispose()
 	{
-		assert(false, "TODO!");
 	}
 }
 
 final class WinAPIEventDriverCore : EventDriverCore {
 @safe: /*@nogc:*/ nothrow:
-	override size_t waiterCount()
-	{
-		assert(false, "TODO!");
+	private {
+		bool m_exit;
+		size_t m_waiterCount;
+		DWORD m_tid;
+		LoopTimeoutTimerDriver m_timers;
+		HANDLE[] m_registeredEvents;
+		HANDLE m_fileCompletionEvent;
 	}
 
+	this(LoopTimeoutTimerDriver timers)
+	{
+		m_timers = timers;
+		m_tid = () @trusted { return GetCurrentThreadId(); } ();
+		m_fileCompletionEvent = () @trusted { return CreateEventW(null, false, false, null); } ();
+		m_registeredEvents ~= m_fileCompletionEvent;
+	}
+
+	override size_t waiterCount() { return m_waiterCount; }
+
 	override ExitReason processEvents(Duration timeout = Duration.max)
 	{
-		assert(false, "TODO!");
+		import std.algorithm : min;
+		import core.time : hnsecs, seconds;
+
+		if (m_exit) {
+			m_exit = false;
+			return ExitReason.exited;
+		}
+
+		bool got_event;
+
+		if (timeout <= 0.seconds) {
+			got_event = doProcessEvents(0.seconds);
+			got_event |= m_timers.process(currStdTime);
+			return got_event ? ExitReason.idle : ExitReason.timeout;
+		} else {
+			long now = currStdTime;
+			do {
+				auto nextto = min(m_timers.getNextTimeout(now), timeout);
+				got_event |= doProcessEvents(nextto);
+				long prev_step = now;
+				now = currStdTime;
+				got_event |= m_timers.process(now);
+
+				if (m_exit) {
+					m_exit = false;
+					return ExitReason.exited;
+				}
+				if (timeout != Duration.max)
+					timeout -= (now - prev_step).hnsecs;
+			} while (timeout > 0.seconds);
+		}
+
+		if (!waiterCount) return ExitReason.outOfWaiters;
+		if (got_event) return ExitReason.idle;
+		return ExitReason.timeout;
 	}
 
 	override void exit()
-	{
-		assert(false, "TODO!");
+	@trusted {
+		m_exit = true;
+		PostThreadMessageW(m_tid, WM_QUIT, 0, 0);
 	}
 
 	override void clearExitFlag()
 	{
-		assert(false, "TODO!");
+		m_exit = false;
 	}
 
 	protected override void* rawUserData(StreamSocketFD descriptor, size_t size, DataInitializer initialize, DataInitializer destroy) @system
@@ -87,6 +143,50 @@ final class WinAPIEventDriverCore : EventDriverCore {
 	{
 		assert(false, "TODO!");
 	}
+
+	private bool doProcessEvents(Duration max_wait)
+	{
+		import core.time : seconds;
+		import std.algorithm.comparison : min;
+
+		bool got_event;
+
+		if (max_wait > 0.seconds) {
+			DWORD timeout_msecs = max_wait == Duration.max ? INFINITE : cast(DWORD)min(max_wait.total!"msecs", DWORD.max);
+			auto ret = () @trusted { return MsgWaitForMultipleObjectsEx(cast(DWORD)m_registeredEvents.length, m_registeredEvents.ptr,
+				timeout_msecs, QS_ALLEVENTS, MWMO_ALERTABLE|MWMO_INPUTAVAILABLE); } ();
+			
+			/*if (ret == WAIT_OBJECT_0) {
+				got_event = true;
+				Win32TCPConnection[] to_remove;
+				foreach( fw; m_fileWriters.byKey )
+					if( fw.testFileWritten() )
+						to_remove ~= fw;
+				foreach( fw; to_remove )
+				m_fileWriters.remove(fw);
+			}*/
+		}
+
+		MSG msg;
+		//uint cnt = 0;
+		while (() @trusted { return PeekMessageW(&msg, null, 0, 0, PM_REMOVE); } ()) {
+			if( msg.message == WM_QUIT ) {
+				m_exit = true;
+				return false;
+			}
+			() @trusted {
+				TranslateMessage(&msg);
+				DispatchMessageW(&msg);
+			} ();
+
+			got_event = true;
+
+			// process timers every now and then so that they don't get stuck
+			//if (++cnt % 10 == 0) processTimers();
+		}
+
+		return got_event;
+	}
 }
 
 final class WinAPIEventDriverSockets : EventDriverSockets {
@@ -386,3 +486,10 @@ final class WinAPIEventDriverWatchers : EventDriverWatchers {
 		assert(false, "TODO!");
 	}
 }
+
+private long currStdTime()
+@safe nothrow {
+	import std.datetime : Clock;
+	scope (failure) assert(false);
+	return Clock.currStdTime;
+}