shared/list: add LIST_APPEND

2 files changed, 32 insertions, 0 deletions

diff --git a/src/shared/list.h b/src/shared/list.h
index c020f7e936..f0458b54e2 100644
--- a/src/shared/list.h
+++ b/src/shared/list.h
@@ -55,6 +55,14 @@
                 *_head = _item;                                         \
         } while(false)
 
+/* Append an item to the list */
+#define LIST_APPEND(name,head,item)                                     \
+        do {                                                            \
+                typeof(*(head)) *_tail;                                 \
+                LIST_FIND_TAIL(name,head,_tail);                        \
+                LIST_INSERT_AFTER(name,head,_tail,item);                \
+        } while(false)
+
 /* Remove an item from the list */
 #define LIST_REMOVE(name,head,item)                                     \
         do {                                                            \
diff --git a/src/test/test-list.c b/src/test/test-list.c
index fa52ad1db8..e9d47f0503 100644
--- a/src/test/test-list.c
+++ b/src/test/test-list.c
@@ -105,5 +105,29 @@ int main(int argc, const char *argv[]) {
         LIST_REMOVE(item, head, &items[3]);
         assert_se(LIST_JUST_US(item, &items[3]));
 
+        assert_se(head == NULL);
+
+        for (i = 0; i < ELEMENTSOF(items); i++) {
+                assert_se(LIST_JUST_US(item, &items[i]));
+                LIST_APPEND(item, head, &items[i]);
+        }
+
+        assert_se(!LIST_JUST_US(item, head));
+
+        assert_se(items[0].item_next == &items[1]);
+        assert_se(items[1].item_next == &items[2]);
+        assert_se(items[2].item_next == &items[3]);
+        assert_se(items[3].item_next == NULL);
+
+        assert_se(items[0].item_prev == NULL);
+        assert_se(items[1].item_prev == &items[0]);
+        assert_se(items[2].item_prev == &items[1]);
+        assert_se(items[3].item_prev == &items[2]);
+
+        for (i = 0; i < ELEMENTSOF(items); i++)
+          LIST_REMOVE(item, head, &items[i]);
+
+        assert_se(head == NULL);
+
         return 0;
 }