FreeBSD/Linux Kernel Cross Reference
sys/dev/drm2/drm_hashtab.h

     /**************************************************************************
      *
      * 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.
     *
     *
     **************************************************************************/
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    /*
     * 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)
    
    struct drm_hash_item {
            LIST_ENTRY(drm_hash_item) head;
            unsigned long key;
    };
    
    struct drm_open_hash {
            LIST_HEAD(drm_hash_item_list, drm_hash_item) *table;
            unsigned int size;
            unsigned int order;
            unsigned long mask;
    };
    
    extern int drm_ht_create(struct drm_open_hash *ht, unsigned int order);
    extern int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item);
    extern int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item,
                                         unsigned long seed, int bits, int shift,
                                         unsigned long add);
    extern int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key, struct drm_hash_item **item);
    
    extern void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key);
    extern int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key);
    extern int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item);
    extern void drm_ht_remove(struct drm_open_hash *ht);
    
    #endif

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