diff options
| author | Eduardo Lima Mitev <elima@igalia.com> | 2015-10-23 16:31:41 +0200 |
|---|---|---|
| committer | Eduardo Lima Mitev <elima@igalia.com> | 2015-11-10 21:13:35 +0100 |
| commit | fb3b5669cee85781b603f612228387e9a2e4120f (patch) | |
| tree | 8492a7f852f6680384ef38d19cfbee78df7f71d0 /src | |
| parent | 94ff35204dba0ddbd7f5c4342206c8acba22d32f (diff) | |
| download | external_mesa3d-fb3b5669cee85781b603f612228387e9a2e4120f.zip external_mesa3d-fb3b5669cee85781b603f612228387e9a2e4120f.tar.gz external_mesa3d-fb3b5669cee85781b603f612228387e9a2e4120f.tar.bz2 | |
util: Add list_is_singular() helper function
Returns whether the list has exactly one element.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/util/list.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/util/list.h b/src/util/list.h index b98ce59..066f9b8 100644 --- a/src/util/list.h +++ b/src/util/list.h @@ -99,6 +99,14 @@ static inline bool list_empty(struct list_head *list) return list->next == list; } +/** + * Returns whether the list has exactly one element. + */ +static inline bool list_is_singular(const struct list_head *list) +{ + return list->next != NULL && list->next->next == list; +} + static inline unsigned list_length(struct list_head *list) { struct list_head *node; |