version 4.5.0

PIThread::stopAndWait now returns bool
PIKbdListener on Linux now use piwaitevent_p and can immediately stop
new base method piZeroMemory, also migrate all "memset 0" to piZeroMemory

libs/main/thread/pithread.cpp

@@ -651,9 +651,9 @@ bool PIThread::startOnce(std::function<void()> func) {
 }
 
 
-void PIThread::stopAndWait(PISystemTime timeout) {
+bool PIThread::stopAndWait(PISystemTime timeout) {
 	stop();
-	waitForFinish(timeout);
+	return waitForFinish(timeout);
 }
 
 
@@ -791,7 +791,7 @@ void PIThread::setPriority(PIThread::Priority prior) {
 #  ifndef WINDOWS
 	// PICout(PICoutManipulators::DefaultControls) << "setPriority" << PRIVATE->thread;
 	int policy_ = 0;
-	memset(&(PRIVATE->sparam), 0, sizeof(PRIVATE->sparam));
+	piZeroMemory(PRIVATE->sparam);
 	pthread_getschedparam(PRIVATE->thread, &policy_, &(PRIVATE->sparam));
 	PRIVATE->sparam.
 #	ifndef LINUX