diff options
Diffstat (limited to 'lib/linklist.c')
| -rw-r--r-- | lib/linklist.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lib/linklist.c b/lib/linklist.c index d1b57084ef..d2a29b7ed1 100644 --- a/lib/linklist.c +++ b/lib/linklist.c @@ -28,6 +28,37 @@ DEFINE_MTYPE_STATIC(LIB, LINK_LIST, "Link List"); DEFINE_MTYPE_STATIC(LIB, LINK_NODE, "Link Node"); +/* these *do not* cleanup list nodes and referenced data, as the functions + * do - these macros simply {de,at}tach a listnode from/to a list. + */ + +/* List node attach macro. */ +#define LISTNODE_ATTACH(L, N) \ + do { \ + (N)->prev = (L)->tail; \ + (N)->next = NULL; \ + if ((L)->head == NULL) \ + (L)->head = (N); \ + else \ + (L)->tail->next = (N); \ + (L)->tail = (N); \ + (L)->count++; \ + } while (0) + +/* List node detach macro. */ +#define LISTNODE_DETACH(L, N) \ + do { \ + if ((N)->prev) \ + (N)->prev->next = (N)->next; \ + else \ + (L)->head = (N)->next; \ + if ((N)->next) \ + (N)->next->prev = (N)->prev; \ + else \ + (L)->tail = (N)->prev; \ + (L)->count--; \ + } while (0) + struct list *list_new(void) { return XCALLOC(MTYPE_LINK_LIST, sizeof(struct list)); |