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drm_hashtab.h
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1 /**************************************************************************
2  *
3  * Copyright 2006 Tungsten Graphics, Inc., Bismack, ND. USA.
4  * All Rights Reserved.
5  *
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8  * "Software"), to deal in the Software without restriction, including
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11  * permit persons to whom the Software is furnished to do so, subject to
12  * the following conditions:
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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.
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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  struct hlist_head *table;
50 };
51 
52 extern int drm_ht_create(struct drm_open_hash *ht, unsigned int order);
53 extern int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item);
54 extern int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item,
55  unsigned long seed, int bits, int shift,
56  unsigned long add);
57 extern int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key, struct drm_hash_item **item);
58 
59 extern void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key);
60 extern int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key);
61 extern int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item);
62 extern void drm_ht_remove(struct drm_open_hash *ht);
63 
64 
65 #endif