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android-review.linaro.org / kernel / hikey-linaro / 3a1bd924f36da202e480a0e0174b2878c0924a05 / . / drivers / char / drm / drm_hashtab.h
blob: 40afec05bff80fd37ec9e90332275cbcbfc263d6 [file] [log] [blame]
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +1000[diff] [blame^]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
40typedef struct drm_hash_item{
41 struct hlist_node head;
42 unsigned long key;
43} drm_hash_item_t;
44
45typedef struct drm_open_hash{
46 unsigned int size;
47 unsigned int order;
48 unsigned int fill;
49 struct hlist_head *table;
50} drm_open_hash_t;
51
52
53extern int drm_ht_create(drm_open_hash_t *ht, unsigned int order);
54extern int drm_ht_insert_item(drm_open_hash_t *ht, drm_hash_item_t *item);
55extern int drm_ht_just_insert_please(drm_open_hash_t *ht, drm_hash_item_t *item,
56 unsigned long seed, int bits, int shift,
57 unsigned long add);
58extern int drm_ht_find_item(drm_open_hash_t *ht, unsigned long key, drm_hash_item_t **item);
59
60extern void drm_ht_verbose_list(drm_open_hash_t *ht, unsigned long key);
61extern int drm_ht_remove_key(drm_open_hash_t *ht, unsigned long key);
62extern int drm_ht_remove_item(drm_open_hash_t *ht, drm_hash_item_t *item);
63extern void drm_ht_remove(drm_open_hash_t *ht);
64
65
66#endif
67