if (m_upProcessingThread != null) { m_upProcessingThread.interrupt(); m_upProcessingThread = null;
if(m_upProcessingThread != null) { Thread t=m_upProcessingThread; m_upProcessingThread=null; t.interrupt();
        void suspend() {            running=false;            m_upLatch.lock();            if (m_upProcessingThread != null) {                m_upProcessingThread.interrupt();                m_upProcessingThread = null;            }        }