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0c4490c @gregkh initial 4.40 import
authored
1 /**************************************************************************
2 *
3 * Copyright 2006 Tungsten Graphics, Inc., Bismack, ND. USA.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 *
27 **************************************************************************/
28 /*
29 * Simple open hash tab implementation.
30 *
31 * Authors:
32 * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
33 */
34
35 #ifndef DRM_HASHTAB_H
36 #define DRM_HASHTAB_H
37
38 #define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member)
39
40 struct drm_hash_item {
41 struct hlist_node head;
42 unsigned long key;
43 };
44
45 struct drm_open_hash {
46 unsigned int size;
47 unsigned int order;
48 unsigned int fill;
49 struct hlist_head *table;
50 int use_vmalloc;
51 };
52
53
54 extern int drm_ht_create(struct drm_open_hash *ht, unsigned int order);
55 extern int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item);
56 extern int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item,
57 unsigned long seed, int bits, int shift,
58 unsigned long add);
59 extern int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key, struct drm_hash_item **item);
60
61 extern void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key);
62 extern int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key);
63 extern int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item);
64 extern void drm_ht_remove(struct drm_open_hash *ht);
65
66
67 #endif
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