void startOrKickThread() {
if (sizeCalcThread == null) {
log.debug2("Starting thread");
sizeCalcThread = new SizeCalcThread();
sizeCalcThread.start();
sizeCalcThread.waitRunning();
}
sizeCalcSem.give();
}
void stopThread() {
if (sizeCalcThread != null) {
log.debug2("Stopping thread");
sizeCalcThread.stopSizeCalc();
sizeCalcThread = null;
}
}