added FR_DLIST_INSERT_HEAD

diff --git a/src/util/time.h b/src/util/time.h
index 74d093b2af2adaf3b16990da8cd0961c2671f1ef..51270e24bf4ecb3043d580b0b285bed945e0ec9d 100644 (file)
--- a/src/util/time.h
+++ b/src/util/time.h
@@ -81,6 +81,7 @@ typedef struct fr_time_tracking_t {
  *     Macros to manage a doubly linked list.
  */
 #define FR_DLIST_INIT(head) do { head.prev = head.next = &head; } while (0)
+#define FR_DLIST_INSERT_HEAD(head, entry) do { entry.next = head.next; entry.prev = &head; head.next->prev = &entry; head.next = &entry; } while (0)
 #define FR_DLIST_INSERT_TAIL(head, entry) do { entry.prev = head.prev; entry.next = &head; head.prev->next = &entry; head.prev = &entry; } while (0)
 #define FR_DLIST_INSERT_TAIL_PTR(p_head, entry) do { entry.prev = p_head->prev; entry.next = p_head; p_head->prev->next = &entry; p_head->prev = &entry; } while (0)
 #define FR_DLIST_REMOVE(entry) do { entry.prev->next = entry.next; entry.next->prev = entry.prev; FR_DLIST_INIT(entry); } while (0)