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author | Karel Zak | 2018-12-07 11:37:24 +0100 |
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committer | Karel Zak | 2018-12-07 12:33:34 +0100 |
commit | 7ca122ba843db03d734fdc3f63cfca98a3817fdf (patch) | |
tree | 16d7bd97ef252e02c51bdca95c2c81cfaa81a260 /include | |
parent | libsmartcols: split print.c into print.c, put.c and print-api.c (diff) | |
download | kernel-qcow2-util-linux-7ca122ba843db03d734fdc3f63cfca98a3817fdf.tar.gz kernel-qcow2-util-linux-7ca122ba843db03d734fdc3f63cfca98a3817fdf.tar.xz kernel-qcow2-util-linux-7ca122ba843db03d734fdc3f63cfca98a3817fdf.zip |
include/list: add list_entry_is_first() and list_count_entries()
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'include')
-rw-r--r-- | include/list.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/list.h b/include/list.h index f3ffc7985..96c84e572 100644 --- a/include/list.h +++ b/include/list.h @@ -137,6 +137,16 @@ _INLINE_ int list_entry_is_last(struct list_head *entry, struct list_head *head) } /** + * list_entry_is_first - tests whether is entry first in the list + * @entry: the entry to test. + * @head: the list to test. + */ +_INLINE_ int list_entry_is_first(struct list_head *entry, struct list_head *head) +{ + return head->next == entry; +} + +/** * list_splice - join two lists * @list: the new list to add. * @head: the place to add it in the first list. @@ -198,6 +208,17 @@ _INLINE_ void list_splice(struct list_head *list, struct list_head *head) for (pos = (head)->next, pnext = pos->next; pos != (head); \ pos = pnext, pnext = pos->next) +_INLINE_ size_t list_count_entries(struct list_head *head) +{ + struct list_head *pos; + size_t ct = 0; + + list_for_each(pos, head) + ct++; + + return ct; +} + #define MAX_LIST_LENGTH_BITS 20 /* |