diff options
Diffstat (limited to 'libavahi-core/llist.h')
-rw-r--r-- | libavahi-core/llist.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/libavahi-core/llist.h b/libavahi-core/llist.h new file mode 100644 index 0000000..16a16b6 --- /dev/null +++ b/libavahi-core/llist.h @@ -0,0 +1,50 @@ +#ifndef foollistfoo +#define foollistfoo + +#include <glib.h> + +/* Some macros for maintaining doubly linked lists */ + +/* The head of the linked list. Use this in the structure that shall + * contain the head of the linked list */ +#define AVAHI_LLIST_HEAD(t,name) t *name + +/* The pointers in the linked list's items. Use this in the item structure */ +#define AVAHI_LLIST_FIELDS(t,name) t *name##_next, *name##_prev + +/* Initialize the list's head */ +#define AVAHI_LLIST_HEAD_INIT(t,head) do { (head) = NULL; } while(0) + +/* Initialize a list item */ +#define AVAHI_LLIST_INIT(t,name,item) do { \ + t *_item = (item); \ + g_assert(_item); \ + _item->name##_prev = _item->name##_next = NULL; \ + } while(0) + +/* Prepend an item to the list */ +#define AVAHI_LLIST_PREPEND(t,name,head,item) do { \ + t **_head = &(head), *_item = (item); \ + g_assert(_item); \ + if ((_item->name##_next = *_head)) \ + _item->name##_next->name##_prev = _item; \ + _item->name##_prev = NULL; \ + *_head = _item; \ + } while (0) + +/* Remove an item from the list */ +#define AVAHI_LLIST_REMOVE(t,name,head,item) do { \ + t **_head = &(head), *_item = (item); \ + g_assert(_item); \ + if (_item->name##_next) \ + _item->name##_next->name##_prev = _item->name##_prev; \ + if (_item->name##_prev) \ + _item->name##_prev->name##_next = _item->name##_next; \ + else {\ + g_assert(*_head == _item); \ + *_head = _item->name##_next; \ + } \ + _item->name##_next = _item->name##_prev = NULL; \ + } while(0) + +#endif |