blob: 41e6ab1e0947184dfbae356378f42c79fdb76ff2 (
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
57
58
59
60
61
62
63
64
|
/* slab.h
* Definitions for very simple slab handling
*
* $Id: slab.h,v 1.2 2003/12/03 08:53:36 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __SLAB_H__
#define __SLAB_H__
#define NITEMS_PER_SLAB 100
typedef struct _freed_item {
struct _freed_item *next;
} freed_item_t;
/* we never free any memory we have allocated, when it is returned to us
we just store it in the free list until (hopefully) it gets used again
*/
#define SLAB_ALLOC(item, list) \
if(!list){ \
int i; \
char *tmp; \
tmp=(char *)g_malloc(NITEMS_PER_SLAB* \
((sizeof(*item) > sizeof(freed_item_t)) ? \
sizeof(*item) : sizeof(freed_item_t))); \
for(i=0;i<NITEMS_PER_SLAB;i++){ \
item=(void *)tmp; \
((freed_item_t *)((void *)item))->next= \
(freed_item_t *)((void *)list); \
list=item; \
tmp+= \
((sizeof(*item) > sizeof(freed_item_t)) ?\
sizeof(*item) : sizeof(freed_item_t));\
} \
} \
item=list; \
list=(void *)(((freed_item_t *)((void *)item))->next);
#define SLAB_FREE(item, list) \
{ \
((freed_item_t *)((void *)item))->next= \
(freed_item_t *)((void *)list); \
list=item; \
}
#endif /* slab.h */
|
