diff options
Diffstat (limited to 'include/asterisk/linkedlists.h')
| -rw-r--r-- | include/asterisk/linkedlists.h | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/include/asterisk/linkedlists.h b/include/asterisk/linkedlists.h index 3c89e7117..d35cfad3e 100644 --- a/include/asterisk/linkedlists.h +++ b/include/asterisk/linkedlists.h @@ -744,13 +744,37 @@ struct { \ #define AST_RWLIST_APPEND_LIST AST_LIST_APPEND_LIST /*! - \brief Removes and returns the head entry from a list. + \brief Inserts a whole list after a specific entry in a list \param head This is a pointer to the list head structure + \param list This is a pointer to the list to be inserted. + \param elm This is a pointer to the entry after which the new list should + be inserted. \param field This is the name of the field (declared using AST_LIST_ENTRY()) - used to link entries of this list together. + used to link entries of the lists together. - Removes the head entry from the list, and returns a pointer to it. - This macro is safe to call on an empty list. + Note: The source list (the \a list parameter) will be empty after + calling this macro (the list entries are \b moved to the target list). + */ +#define AST_LIST_INSERT_LIST_AFTER(head, list, elm, field) do { \ + (list)->last->field.next = (elm)->field.next; \ + (elm)->field.next = (list)->first; \ + if ((head)->last == elm) { \ + (head)->last = (list)->last; \ + } \ + (list)->first = NULL; \ + (list)->last = NULL; \ +} while(0) + +#define AST_RWLIST_INSERT_LIST_AFTER AST_LIST_INSERT_LIST_AFTER + +/*! + * \brief Removes and returns the head entry from a list. + * \param head This is a pointer to the list head structure + * \param field This is the name of the field (declared using AST_LIST_ENTRY()) + * used to link entries of this list together. + * + * Removes the head entry from the list, and returns a pointer to it. + * This macro is safe to call on an empty list. */ #define AST_LIST_REMOVE_HEAD(head, field) ({ \ typeof((head)->first) cur = (head)->first; \ |