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 /* 31 * Simple open hash tab implementation. 32 * 33 * Authors: 34 * Thomas Hellström <thomas-at-tungstengraphics-dot-com> 35 */ 36 37 #ifndef DRM_HASHTAB_H 38 #define DRM_HASHTAB_H 39 40 #define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member) 41 42 struct drm_hash_item { 43 LIST_ENTRY(drm_hash_item) head; 44 unsigned long key; 45 }; 46 47 struct drm_open_hash { 48 LIST_HEAD(drm_hash_item_list, drm_hash_item) *table; 49 unsigned int size; 50 unsigned int order; 51 unsigned long mask; 52 }; 53 54 extern int drm_ht_create(struct drm_open_hash *ht, unsigned int order); 55 extern int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item); 56 extern int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item, 57 unsigned long seed, int bits, int shift, 58 unsigned long add); 59 extern int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key, struct drm_hash_item **item); 60 61 extern void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key); 62 extern int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key); 63 extern int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item); 64 extern void drm_ht_remove(struct drm_open_hash *ht); 65 66 #endif 67