38         base_node* prev;  member
40         constexpr base_node(base_node* n, base_node* p) : next(n), prev(p) {}  in base_node()
41 …explicit base_node() : next((base_node*)(uintptr_t)0xcdcdcdcd), prev((base_node*)(uintptr_t)0xcdcd…  in base_node()
53     inline base_node* last() const { return head.prev; }  in last()
59         n->prev = head.prev;  in add()
61         head.prev->next = n;  in add()
62         head.prev = n;  in add()
69         n.prev->next = n.next;  in remove()
70         n.next->prev = n.prev;  in remove()
79             lst.head.prev = head.prev;  in flush_to()
80             head.next->prev = &lst.head;  in flush_to()
81             head.prev->next = &lst.head;  in flush_to()
88         head.prev = &head;  in clear()
369                 nxt = n->prev;  in notify_relaxed()
404                 next = n->prev;  in notify_one_relaxed()