X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fshared%2Flist.h;h=476757460aa6145c55ccc2873f016d70862582f0;hp=47f275a019403c873d0d52341f7ab93fdb120d48;hb=51d122af23533b0b8318911c4fc8b128ad8eafb7;hpb=f274ece0f76b5709408821e317e87aef76123db6

diff --git a/src/shared/list.h b/src/shared/list.h
index 47f275a01..476757460 100644
--- a/src/shared/list.h
+++ b/src/shared/list.h
@@ -81,7 +81,7 @@
                 (head) = _item;                                         \
         } while (false)
 
-/* Find the head of the list */
+/* Find the tail of the list */
 #define LIST_FIND_TAIL(t,name,item,tail)                                \
         do {                                                            \
                 t *_item = (item);                                      \
@@ -123,3 +123,10 @@
 
 #define LIST_FOREACH_AFTER(name,i,p)                                    \
         for ((i) = (p)->name##_next; (i); (i) = (i)->name##_next)
+
+/* Loop starting from p->next until p->prev.
+   p can be adjusted meanwhile. */
+#define LIST_LOOP_BUT_ONE(name,i,head,p)                                \
+        for ((i) = (p)->name##_next ? (p)->name##_next : (head);        \
+             (i) != (p);                                                \
+             (i) = (i)->name##_next ? (i)->name##_next : (head))