PIIODevice threaded read refactoring

libs/main/io_devices/piserial.cpp

@@ -219,7 +219,7 @@ void PISerial::construct() {
 	PRIVATE->hCom = 0;
 #endif
 	fd = -1;
-	setPriority(piHigh);
+	//setPriority(piHigh);
 	vtime = 10;
 	sending = false;
 	setParameters(0);
@@ -680,9 +680,8 @@ bool PISerial::openDevice() {
 
 
 bool PISerial::closeDevice() {
-	if (isRunning() && !isStopping()) {
-		stop();
-		PIThread::terminate();
+	if (isThreadedRead()) {
+		stopThreadedRead();
 	}
 	if (fd != -1) {
 #ifdef WINDOWS
@@ -803,7 +802,7 @@ ssize_t PISerial::readDevice(void * read_to, ssize_t max_size) {
 		DWORD err = GetLastError();
 		//piCout << err;
 		if (err == ERROR_BAD_COMMAND || err == ERROR_ACCESS_DENIED) {
-			PIThread::stop(false);
+			softStopThreadedRead();
 			close();
 			return 0;
 		}