start move to interruption of blocking calls, PIThread and PIEthernet

libs/main/io_devices/piethernet.h

@@ -500,6 +500,10 @@ private:
 	EVENT_HANDLER1(void, clientDeleted, PIObject *, o);
 	static void server_func(void * eth);
 	void setType(Type t, bool reopen = true);
+	bool connectTCP();
+#ifdef WINDOWS
+	long waitForEvent(long mask);
+#endif
 
 	static int ethErrorCore();
 	static PIString ethErrorString();