228     if ( sc->aen_q.head == sc->aen_q.tail ) {  in tws_retrive_aen()
252             index = (sc->aen_q.depth + sc->aen_q.tail - 1) % sc->aen_q.depth;  in tws_retrive_aen()
262             }while ( index != sc->aen_q.tail );  in tws_retrive_aen()
263             if ( index == sc->aen_q.tail ) {  in tws_retrive_aen()
276             }while ( index != sc->aen_q.tail );  in tws_retrive_aen()
277             if ( index == sc->aen_q.tail ) {  in tws_retrive_aen()
377     volatile u_int16_t head, tail;  in tws_circular_aenq_insert()  local
382     tail = cq->tail;  in tws_circular_aenq_insert()
383     retr = q[tail].retrieved;  in tws_circular_aenq_insert()
385     memcpy(&q[tail], aen, sizeof(struct tws_event_packet));  in tws_circular_aenq_insert()
386     tail = (tail+1) % cq->depth;  in tws_circular_aenq_insert()
388     if ( head == tail ) { /* q is full */  in tws_circular_aenq_insert()
393     cq->tail = tail;  in tws_circular_aenq_insert()