diff options
Diffstat (limited to 'src/include/ipxe/list.h')
| -rw-r--r-- | src/include/ipxe/list.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/include/ipxe/list.h b/src/include/ipxe/list.h index 8de25498..2f02e71f 100644 --- a/src/include/ipxe/list.h +++ b/src/include/ipxe/list.h @@ -399,6 +399,17 @@ extern void extern_list_splice_tail_init ( struct list_head *list, ( (head)->prev == &(entry)->member ) /** + * Test if entry is the list head + * + * @v entry List entry + * @v head List head + * @v member Name of list field within iterator's type + * @ret is_head Entry is the list head + */ +#define list_is_head_entry( entry, head, member ) \ + ( (head) == &(entry)->member ) + +/** * Iterate over a list * * @v pos Iterator @@ -479,6 +490,22 @@ extern void extern_list_splice_tail_init ( struct list_head *list, pos = list_entry ( pos->member.prev, typeof ( *pos ), member ) ) /** + * Iterate over subsequent entries in a list, safe against deletion + * + * @v pos Iterator + * @v tmp Temporary value (of same type as iterator) + * @v head List head + * @v member Name of list field within iterator's type + */ +#define list_for_each_entry_safe_continue( pos, tmp, head, member ) \ + for ( list_check ( (head) ), \ + pos = list_entry ( pos->member.next, typeof ( *pos ), member ), \ + tmp = list_entry ( pos->member.next, typeof ( *tmp ), member ); \ + &pos->member != (head); \ + pos = tmp, \ + tmp = list_entry ( tmp->member.next, typeof ( *tmp ), member ) ) + +/** * Test if list contains a specified entry * * @v entry Entry |