Add FIRST/NEXT/LAST/PREV macros, analogous to sys/queue.h

include/ucore/tailq.h

@@ -124,6 +124,23 @@ static UC_INLINE void uc_tailq_move_tail(struct TailQ *entry, struct TailQ *head
     uc_taiq_insert(entry, head->prev, head);
 }
 
+//FIRST/NEXT/LAST/PREV macros similar to sys/queue.h 
+//Note that unlike the standard TAILQ, you have to check
+// == head instead of == NULL to determine if the tailq entry
+// exists
+
+#define UC_TAILQ_FIRST(head)\
+((head)->next)
+
+#define UC_TAILQ_NEXT(entry)\
+((entry)->next)
+
+#define UC_TAILQ_LAST(head)\
+((head)->prev)
+
+#define UC_TAILQ_PREV(entry)\
+((entry)->prev)
+
 /** Iterate over a tailq. The tailq cannot be altered while iterating.
  *
  * @param entry a struct TailQ* to which each element is assigned.