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#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32/*
33 * Simple open hash tab implementation.
34 *
35 * Authors:
36 * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
37 */
38
39#ifndef DRM_HASHTAB_H
40#define DRM_HASHTAB_H
41
42#define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member)
43
44struct drm_hash_item {
45	LIST_ENTRY(drm_hash_item) head;
46	unsigned long key;
47};
48
49struct drm_open_hash {
50	LIST_HEAD(drm_hash_item_list, drm_hash_item) *table;
51	unsigned int size;
52	unsigned int order;
53	unsigned long mask;
54};
55
56extern int drm_ht_create(struct drm_open_hash *ht, unsigned int order);
57extern int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item);
58extern 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);
61extern int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key, struct drm_hash_item **item);
62
63extern void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key);
64extern int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key);
65extern int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item);
66extern void drm_ht_remove(struct drm_open_hash *ht);
67
68#endif
69