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#ifndef foollistfoo
#define foollistfoo
/* $Id$ */
/***
This file is part of polypaudio.
polypaudio is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
polypaudio 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#define PA_LLIST_HEAD(t,name) t *name
#define PA_LLIST_FIELDS(t) t *next, *prev
#define PA_LLIST_HEAD_INIT(t,item) do { (item) = NULL; } while(0)
#define PA_LLIST_INIT(t,item) do { \
t *_item = (item); \
assert(_item); \
_item->prev = _item->next = NULL; \
} while(0)
#define PA_LLIST_PREPEND(t,head,item) do { \
t **_head = &(head), *_item = (item); \
assert(_item); \
if ((_item->next = *_head)) \
_item->next->prev = _item; \
_item->prev = NULL; \
*_head = _item; \
} while (0)
#define PA_LLIST_REMOVE(t,head,item) do { \
t **_head = &(head), *_item = (item); \
assert(_item); \
if (_item->next) \
_item->next->prev = _item->prev; \
if (_item->prev) \
_item->prev->next = _item->next; \
else {\
assert(*_head == _item); \
*_head = _item->next; \
} \
_item->next = _item->prev = NULL; \
} while(0)
#endif
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