Update

Kha/Tools/windows_x64/std/cs/_std/sys/thread/Condition.hx

@@ -0,0 +1,37 @@
+package sys.thread;
+
+import cs.system.threading.Monitor;
+
+@:coreApi
+@:access(sys.thread.Mutex)
+class Condition {
+	final object:cs.system.Object;
+
+	public function new():Void {
+		this.object = new cs.system.Object();
+	}
+
+	public function acquire():Void {
+		Monitor.Enter(object);
+	}
+
+	public function tryAcquire():Bool {
+		return Monitor.TryEnter(object);
+	}
+
+	public function release():Void {
+		Monitor.Exit(object);
+	}
+
+	public function wait():Void {
+		Monitor.Wait(object);
+	}
+
+	public function signal():Void {
+		Monitor.Pulse(object);
+	}
+
+	public function broadcast():Void {
+		Monitor.PulseAll(object);
+	}
+}

Kha/Tools/windows_x64/std/cs/_std/sys/thread/Semaphore.hx

@@ -0,0 +1,22 @@
+package sys.thread;
+
+@:coreApi
+class Semaphore {
+	final native:cs.system.threading.Semaphore;
+
+	public function new(value:Int):Void {
+		this.native = new cs.system.threading.Semaphore(value, 0x7FFFFFFF);
+	}
+
+	public function acquire():Void {
+		native.WaitOne();
+	}
+
+	public function tryAcquire(?timeout:Float):Bool {
+		return native.WaitOne(timeout == null ? 0 : Std.int(timeout * 1000));
+	}
+
+	public function release():Void {
+		native.Release();
+	}
+}