diff options
Diffstat (limited to 'drivers/char/drm/drm_hashtab.h')
| -rw-r--r-- | drivers/char/drm/drm_hashtab.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/char/drm/drm_hashtab.h b/drivers/char/drm/drm_hashtab.h new file mode 100644 index 000000000000..40afec05bff8 --- /dev/null +++ b/drivers/char/drm/drm_hashtab.h @@ -0,0 +1,67 @@ +/************************************************************************** + * + * Copyright 2006 Tungsten Graphics, Inc., Bismack, ND. USA. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE + * USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * + **************************************************************************/ +/* + * Simple open hash tab implementation. + * + * Authors: + * Thomas Hellström <thomas-at-tungstengraphics-dot-com> + */ + +#ifndef DRM_HASHTAB_H +#define DRM_HASHTAB_H + +#define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member) + +typedef struct drm_hash_item{ + struct hlist_node head; + unsigned long key; +} drm_hash_item_t; + +typedef struct drm_open_hash{ + unsigned int size; + unsigned int order; + unsigned int fill; + struct hlist_head *table; +} drm_open_hash_t; + + +extern int drm_ht_create(drm_open_hash_t *ht, unsigned int order); +extern int drm_ht_insert_item(drm_open_hash_t *ht, drm_hash_item_t *item); +extern int drm_ht_just_insert_please(drm_open_hash_t *ht, drm_hash_item_t *item, + unsigned long seed, int bits, int shift, + unsigned long add); +extern int drm_ht_find_item(drm_open_hash_t *ht, unsigned long key, drm_hash_item_t **item); + +extern void drm_ht_verbose_list(drm_open_hash_t *ht, unsigned long key); +extern int drm_ht_remove_key(drm_open_hash_t *ht, unsigned long key); +extern int drm_ht_remove_item(drm_open_hash_t *ht, drm_hash_item_t *item); +extern void drm_ht_remove(drm_open_hash_t *ht); + + +#endif + |