[RTSERVICE] Add rt_list_for_each_entry_safe macros definition.

include/rtservice.h

@@ -141,6 +141,19 @@ rt_inline unsigned int rt_list_len(const rt_list_t *l)
          &pos->member != (head);    \
          pos = rt_list_entry(pos->member.next, typeof(*pos), member))
 
+/**
+ * rt_list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
+ * @pos:    the type * to use as a loop cursor.
+ * @n:      another type * to use as temporary storage
+ * @head:   the head for your list.
+ * @member: the name of the list_struct within the struct.
+ */
+#define rt_list_for_each_entry_safe(pos, n, head, member)           \
+    for (pos = rt_list_entry((head)->next, typeof(*pos), member),   \
+         n = rt_list_entry(pos->member.next, typeof(*pos), member);  \
+         &pos->member != (head);    \
+         pos = n, n = rt_list_entry(n->member.next, typeof(*n), member))
+
 /**
  * rt_list_first_entry - get the first element from a list
  * @ptr:    the list head to take the element from.