FreeTDS API
dlist.h
1 /* Dlist - dynamic list
2  * Copyright (C) 2016-2024 Frediano Ziglio
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Library General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Library General Public License for more details.
13  *
14  * You should have received a copy of the GNU Library General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17  * Boston, MA 02111-1307, USA.
18  */
19 
20 #ifndef TDS_DLIST_H
21 #define TDS_DLIST_H
22 
23 typedef struct dlist_ring {
24  struct dlist_ring *next;
25  struct dlist_ring *prev;
26 } dlist_ring;
27 
28 #if ENABLE_EXTRA_CHECKS
29 void dlist_ring_check(dlist_ring *ring);
30 #endif
31 
32 #define DLIST_FIELDS(name) \
33  dlist_ring name
34 
35 #define DLIST_FOREACH(prefix, list, p) \
36  for (p = prefix ## _ ## first(list); p != NULL; p = prefix ## _ ## next(list, p))
37 
38 static inline void dlist_insert_after(dlist_ring *ring_pos, dlist_ring *ring_item)
39 {
40  assert(!ring_item->next && !ring_item->prev);
41  ring_pos->next->prev = ring_item;
42  ring_item->prev = ring_pos;
43  ring_item->next = ring_pos->next;
44  ring_pos->next = ring_item;
45  assert(ring_item->next && ring_item->prev);
46 }
47 
48 #endif /* TDS_DLIST_H */
Definition: dlist.h:23