clock_lock 1163 src/dps8/dps8_scu.c static pthread_mutex_t clock_lock = PTHREAD_MUTEX_INITIALIZER; clock_lock 1170 src/dps8/dps8_scu.c pthread_mutex_lock (& clock_lock); clock_lock 1338 src/dps8/dps8_scu.c pthread_mutex_unlock (& clock_lock);