88         let mut i = location.head;  in too_old()
102         while i != location.head {  in too_old()
123                 (self.buffer[location.head as usize])  in fetch_timestamp()
148         match consume.compare(self.filled.head) {  in purge_consumed_location()
150                 self.release_packet(self.filled.head);  in purge_consumed_location()
151                 self.filled.head = self.filled.head.wrapping_add(1);  in purge_consumed_location()
154                 self.release_packet(self.filled.head);  in purge_consumed_location()
155                 self.filled.head = self.filled.head.wrapping_add(1);  in purge_consumed_location()
174             if self.active.has_data() && (self.active.head == self.filled.head) {  in purge_buffers()
188                 self.active.head = self.active.head.wrapping_add(1);  in purge_buffers()
191             self.release_packet(self.filled.head);  in purge_buffers()
192             self.filled.head = self.filled.head.wrapping_add(1);  in purge_buffers()
205                 self.filled.head = sequence_number;  in push()
209                 self.filled.head = sequence_number;  in push()
240         let mut i = self.active.head;  in build_sample()
262                 consume.head = self.active.head;  in build_sample()
268                 consume.head = self.active.head;  in build_sample()
299         let head_payload = self.buffer[consume.head as usize]  in build_sample()
320             self.active.head = consume.tail;  in build_sample()
325         self.active.head = consume.tail;  in build_sample()
329         let mut i = consume.head;  in build_sample()
377             &mut self.prepared_samples[self.prepared.head as usize],  in pop()
380         self.prepared.head = self.prepared.head.wrapping_add(1);  in pop()