Lines Matching defs:tail
62 u32 head, count = WAIT_COUNT, tail;
65 tail = par->cur_tail;
68 if ((tail == head) ||
69 (tail > head &&
70 (par->iring.size - tail + head) >= space) ||
71 (tail < head && (head - tail) >= space)) {
116 * space. Returns the tail of the buffer
132 * This advances the tail of the ringbuffer, effectively
433 * the head and tail pointers = 0