blob: cd2b189e1be6caac74fd2402d1d84d4119fbca22 [file] [log] [blame]
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +10001/**************************************************************************
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:
Jan Engelhardt96de0e22007-10-19 23:21:04 +020032 * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100033 */
34
35#ifndef DRM_HASHTAB_H
36#define DRM_HASHTAB_H
37
Thomas Hellstrom8d153f72006-08-07 22:36:47 +100038#define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member)
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100039
Dave Airliee0be4282007-07-12 10:26:44 +100040struct drm_hash_item {
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100041 struct hlist_node head;
42 unsigned long key;
Dave Airliee0be4282007-07-12 10:26:44 +100043};
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100044
Dave Airliee0be4282007-07-12 10:26:44 +100045struct drm_open_hash {
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100046 unsigned int size;
47 unsigned int order;
48 unsigned int fill;
49 struct hlist_head *table;
Dave Airliecd839d02007-02-18 17:14:09 +110050 int use_vmalloc;
Dave Airliee0be4282007-07-12 10:26:44 +100051};
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100052
53
Dave Airliee0be4282007-07-12 10:26:44 +100054extern int drm_ht_create(struct drm_open_hash *ht, unsigned int order);
55extern int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item);
56extern int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item,
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100057 unsigned long seed, int bits, int shift,
58 unsigned long add);
Dave Airliee0be4282007-07-12 10:26:44 +100059extern int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key, struct drm_hash_item **item);
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100060
Dave Airliee0be4282007-07-12 10:26:44 +100061extern void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key);
62extern int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key);
63extern int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item);
64extern void drm_ht_remove(struct drm_open_hash *ht);
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100065
66
67#endif