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author | Jonathan McCrohan <jmccrohan@gmail.com> | 2012-04-14 12:56:48 +0100 |
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committer | Jonathan McCrohan <jmccrohan@gmail.com> | 2012-04-14 12:56:48 +0100 |
commit | 0b624384cd52be20e61284551d832b499d7b7707 (patch) | |
tree | 6f95a4bbef47abc9720b96c0722e8f632aef228a /linux/avahi-common/llist.h | |
download | libphidget21-6c284da2cfff41863f06ee8109e2e20fbbd73940.tar.gz |
Imported Upstream version 2.1.8.20120216upstream/2.1.8.20120216
Diffstat (limited to '')
-rw-r--r-- | linux/avahi-common/llist.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/linux/avahi-common/llist.h b/linux/avahi-common/llist.h new file mode 100644 index 0000000..ec69caa --- /dev/null +++ b/linux/avahi-common/llist.h @@ -0,0 +1,77 @@ +#ifndef foollistfoo +#define foollistfoo + +/* $Id: llist.h 872 2005-10-26 01:21:30Z lennart $ */ + +/*** + This file is part of avahi. + + avahi is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + avahi is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General + Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with avahi; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +/** \file llist.h A simple macro based linked list implementation */ + +#include <assert.h> + +#include <avahi-common/cdecl.h> + +AVAHI_C_DECL_BEGIN + +/** 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); \ + 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); \ + 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); \ + 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 {\ + assert(*_head == _item); \ + *_head = _item->name##_next; \ + } \ + _item->name##_next = _item->name##_prev = NULL; \ + } while(0) + +AVAHI_C_DECL_END + +#endif |