flist: add flist_first_entry()

[fio.git] / flist.h

diff --git a/flist.h b/flist.h
index 938ce1d8317378e18b5824128ac7c4b37f4ff893..d453e791e9072eb67b37c5ff6038bf8ff8eae2fc 100644 (file)
--- a/flist.h
+++ b/flist.h
@@ -147,6 +147,15 @@ static inline void flist_splice_tail(struct flist_head *list,
                __flist_splice(list, head->prev, head);
 }
 
+static inline void flist_splice_tail_init(struct flist_head *list,
+                                         struct flist_head *head)
+{
+       if (!flist_empty(list)) {
+               __flist_splice(list, head->prev, head);
+               INIT_FLIST_HEAD(list);
+       }
+}
+
 static inline void flist_splice_init(struct flist_head *list,
                                    struct flist_head *head)
 {
@@ -165,6 +174,9 @@ static inline void flist_splice_init(struct flist_head *list,
 #define flist_entry(ptr, type, member) \
        container_of(ptr, type, member)
 
+#define flist_first_entry(ptr, type, member) \
+       flist_entry((ptr)->next, type, member)
+
 /**
  * flist_for_each      -       iterate over a list
  * @pos:       the &struct flist_head to use as a loop counter.