diff options
| author | David Herrmann <dh.herrmann@gmail.com> | 2013-03-05 01:22:13 +0100 |
|---|---|---|
| committer | David Herrmann <dh.herrmann@gmail.com> | 2013-03-05 01:22:13 +0100 |
| commit | 3c7956e45acc0b7d73f03bee4daa9805af01f680 (patch) | |
| tree | fdcadf94c11e82000aa3d798b70a777d390ae238 /src | |
| parent | b8f58fea9caed09cfbceea713389a93b02d59d42 (diff) | |
shl: dlist: add _first/_last helpers
These helpers return the first and last elements respectively.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/shl_dlist.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/shl_dlist.h b/src/shl_dlist.h index c1d4beb..9e30dc5 100644 --- a/src/shl_dlist.h +++ b/src/shl_dlist.h @@ -102,6 +102,12 @@ static inline bool shl_dlist_empty(struct shl_dlist *head) #define shl_dlist_entry(ptr, type, member) \ shl_offsetof((ptr), type, member) +#define shl_dlist_first(head, type, member) \ + shl_dlist_entry((head)->next, type, member) + +#define shl_dlist_last(head, type, member) \ + shl_dlist_entry((head)->prev, type, member) + #define shl_dlist_for_each(iter, head) \ for (iter = (head)->next; iter != (head); iter = iter->next) |