Xenomai  3.0.8
map.h
1 /*
2  * Copyright (C) 2007 Philippe Gerum <rpm@xenomai.org>.
3  *
4  * Xenomai is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published
6  * by the Free Software Foundation; either version 2 of the License,
7  * or (at your option) any later version.
8  *
9  * Xenomai is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with Xenomai; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
17  * 02111-1307, USA.
18  */
19 #ifndef _COBALT_KERNEL_MAP_H
20 #define _COBALT_KERNEL_MAP_H
21 
22 #include <asm/bitsperlong.h>
23 
29 #define XNMAP_MAX_KEYS (BITS_PER_LONG * BITS_PER_LONG)
30 
31 struct xnmap {
32  int nkeys;
33  int ukeys;
34  int offset;
35  unsigned long himask;
36  unsigned long himap;
37 #define __IDMAP_LONGS ((XNMAP_MAX_KEYS+BITS_PER_LONG-1)/BITS_PER_LONG)
38  unsigned long lomap[__IDMAP_LONGS];
39 #undef __IDMAP_LONGS
40  void *objarray[1];
41 };
42 
43 struct xnmap *xnmap_create(int nkeys,
44  int reserve,
45  int offset);
46 
47 void xnmap_delete(struct xnmap *map);
48 
49 int xnmap_enter(struct xnmap *map,
50  int key,
51  void *objaddr);
52 
53 int xnmap_remove(struct xnmap *map,
54  int key);
55 
56 static inline void *xnmap_fetch_nocheck(struct xnmap *map, int key)
57 {
58  int ofkey = key - map->offset;
59  return map->objarray[ofkey];
60 }
61 
62 static inline void *xnmap_fetch(struct xnmap *map, int key)
63 {
64  int ofkey = key - map->offset;
65 
66  if (ofkey < 0 || ofkey >= map->nkeys)
67  return NULL;
68 
69  return map->objarray[ofkey];
70 }
71 
74 #endif /* !_COBALT_KERNEL_MAP_H */
int xnmap_enter(struct xnmap *map, int key, void *objaddr)
Index an object into a map.
Definition: map.c:150
static void * xnmap_fetch_nocheck(struct xnmap *map, int key)
Search an object into a map - unchecked form.
Definition: map.h:56
void xnmap_delete(struct xnmap *map)
Delete a map.
Definition: map.c:117
int xnmap_remove(struct xnmap *map, int key)
Remove an object reference from a map.
Definition: map.c:209
static void * xnmap_fetch(struct xnmap *map, int key)
Search an object into a map.
Definition: map.h:62
struct xnmap * xnmap_create(int nkeys, int reserve, int offset)
Create a map.
Definition: map.c:80