version 3.21.0

add PISystemTime overload for thread/timer/io classes

libs/main/io_devices/piiodevice.cpp

@@ -226,6 +226,11 @@ void PIIODevice::stopThreadedRead() {
 }
 
 
+void PIIODevice::terminateThreadedRead() {
+	read_thread.terminate();
+}
+
+
 bool PIIODevice::waitThreadedReadFinished(int timeout_ms) {
 	return read_thread.waitForFinish(timeout_ms);
 }
@@ -247,6 +252,11 @@ void PIIODevice::stopThreadedWrite() {
 }
 
 
+void PIIODevice::terminateThreadedWrite() {
+	write_thread.terminate();
+}
+
+
 bool PIIODevice::waitThreadedWriteFinished(int timeout_ms) {
 	return write_thread.waitForFinish(timeout_ms);
 }