src/gallium/auxiliary/util/u_hash_table.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   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
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * General purpose hash table.
  30  *
  31  * @author José Fonseca <jrfonseca@tungstengraphics.com>
  32  */
  33
  34 #ifndef U_HASH_TABLE_H_
  35 #define U_HASH_TABLE_H_
  36
  37
  38 #include "pipe/p_defines.h"
  39
  40
  41 #ifdef __cplusplus
  42 extern "C" {
  43 #endif
  44
  45
  46 /**
  47  * Generic purpose hash table.
  48  */
  49 struct util_hash_table;
  50
  51
  52 /**
  53  * Create an hash table.
  54  *
  55  * @param hash hash function
  56  * @param compare should return 0 for two equal keys.
  57  */
  58 struct util_hash_table *
  59 util_hash_table_create(unsigned (*hash)(void *key),
  60                        int (*compare)(void *key1, void *key2));
  61
  62
  63 enum pipe_error
  64 util_hash_table_set(struct util_hash_table *ht,
  65                     void *key,
  66                     void *value);
  67
  68 void *
  69 util_hash_table_get(struct util_hash_table *ht,
  70                     void *key);
  71
  72
  73 void
  74 util_hash_table_remove(struct util_hash_table *ht,
  75                        void *key);
  76
  77
  78 void
  79 util_hash_table_clear(struct util_hash_table *ht);
  80
  81
  82 enum pipe_error
  83 util_hash_table_foreach(struct util_hash_table *ht,
  84                         enum pipe_error (*callback)
  85                         (void *key, void *value, void *data),
  86                         void *data);
  87
  88 void
  89 util_hash_table_destroy(struct util_hash_table *ht);
  90
  91
  92 #ifdef __cplusplus
  93 }
  94 #endif
  95
  96 #endif /* U_HASH_TABLE_H_ */