Lines Matching defs:head
57 private volatile Reference<? extends T> head;
69 r.next = (head == null) ? r : head;
70 head = r;
85 Reference<? extends T> r = head;
93 head = (rn == r) ? null : rn;
113 if (head == null)
184 for (Reference<? extends T> r = head; r != null;) {
194 // restart from head when overtaken by queue poller(s)
195 r = head;