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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 | #include <linux/list.h> |
39 | |
40 | #define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member) |
41 | |
42 | struct drm_hash_item { |
43 | struct hlist_node head; |
44 | unsigned long key; |
45 | }; |
46 | |
47 | struct drm_open_hash { |
48 | unsigned int size; |
49 | unsigned int order; |
50 | unsigned int fill; |
51 | struct hlist_head *table; |
52 | int use_vmalloc; |
53 | }; |
54 | |
55 | |
56 | extern int drm_ht_create(struct drm_open_hash *ht, unsigned int order); |
57 | extern int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item); |
58 | extern int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item, |
59 | unsigned long seed, int bits, int shift, |
60 | unsigned long add); |
61 | extern int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key, struct drm_hash_item **item); |
62 | |
63 | extern void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key); |
64 | extern int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key); |
65 | extern int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item); |
66 | extern void drm_ht_remove(struct drm_open_hash *ht); |
67 | |
68 | |
69 | #endif |
70 |
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