blob: 851bf01d380a0999335997d1b65e034c132f1f60 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
/*
Unix SMB/Netbios implementation.
Version 1.9.
some simple double linked list macros
Copyright (C) Andrew Tridgell 1998
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* To use these macros you must have a structure containing a next and
prev pointer */
/* hook into the front of the list */
#define DLIST_ADD(list, p) \
{ \
if (!(list)) { \
(list) = (p); \
(p)->next = (p)->prev = NULL; \
} else { \
(list)->prev = (p); \
(p)->next = (list); \
(p)->prev = NULL; \
(list) = (p); \
}\
}
/* remove an element from a list */
#define DLIST_REMOVE(list, p) \
{ \
if ((p) == (list)) { \
(list) = (p)->next; \
if (list) (list)->prev = NULL; \
} else { \
(p)->prev->next = (p)->next; \
if ((p)->next) (p)->next->prev = (p)->prev; \
} \
}
/* promote an element to the top of the list */
#define DLIST_PROMOTE(list, p) \
DLIST_REMOVE(list, p) \
DLIST_ADD(list, p)
|
