diff --git a/include/rtservice.h b/include/rtservice.h index 6de279e63f..ccc63f85e5 100644 --- a/include/rtservice.h +++ b/include/rtservice.h @@ -113,6 +113,27 @@ rt_inline int rt_list_isempty(const rt_list_t *l) #define rt_list_entry(node, type, member) \ ((type *)((char *)(node) - (unsigned long)(&((type *)0)->member))) +/** + * list_for_each_entry - iterate over list of given type + * @pos: the type * to use as a loop cursor. + * @head: the head for your list. + * @member: the name of the list_struct within the struct. + */ +#define list_for_each_entry(pos, head, member) \ + for (pos = rt_list_entry((head)->next, typeof(*pos), member); \ + &pos->member != (head); \ + pos = rt_list_entry(pos->member.next, typeof(*pos), member)) + +/** + * list_first_entry - get the first element from a list + * @ptr: the list head to take the element from. + * @type: the type of the struct this is embedded in. + * @member: the name of the list_struct within the struct. + * + * Note, that list is expected to be not empty. + */ +#define list_first_entry(ptr, type, member) \ + rt_list_entry((ptr)->next, type, member) /*@}*/ #ifdef __cplusplus