src/gallium/auxiliary/translate/translate_cache.c

   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 #include "util/u_memory.h"
  29 #include "pipe/p_state.h"
  30 #include "translate.h"
  31 #include "translate_cache.h"
  32
  33 #include "cso_cache/cso_cache.h"
  34 #include "cso_cache/cso_hash.h"
  35
  36 struct translate_cache {
  37    struct cso_hash *hash;
  38 };
  39
  40 struct translate_cache * translate_cache_create( void )
  41 {
  42    struct translate_cache *cache = MALLOC_STRUCT(translate_cache);
  43    if (cache == NULL) {
  44       return NULL;
  45    }
  46
  47    cache->hash = cso_hash_create();
  48    return cache;
  49 }
  50
  51
  52 static INLINE void delete_translates(struct translate_cache *cache)
  53 {
  54    struct cso_hash *hash = cache->hash;
  55    struct cso_hash_iter iter = cso_hash_first_node(hash);
  56    while (!cso_hash_iter_is_null(iter)) {
  57       struct translate *state = (struct translate*)cso_hash_iter_data(iter);
  58       iter = cso_hash_iter_next(iter);
  59       if (state) {
  60          state->release(state);
  61       }
  62    }
  63 }
  64
  65 void translate_cache_destroy(struct translate_cache *cache)
  66 {
  67    delete_translates(cache);
  68    cso_hash_delete(cache->hash);
  69    FREE(cache);
  70 }
  71
  72
  73 static INLINE unsigned translate_hash_key_size(struct translate_key *key)
  74 {
  75    unsigned size = sizeof(struct translate_key) -
  76                    sizeof(struct translate_element) * (PIPE_MAX_ATTRIBS - key->nr_elements);
  77    return size;
  78 }
  79
  80 static INLINE unsigned create_key(struct translate_key *key)
  81 {
  82    unsigned hash_key;
  83    unsigned size = translate_hash_key_size(key);
  84    /*debug_printf("key size = %d, (els = %d)\n",
  85      size, key->nr_elements);*/
  86    hash_key = cso_construct_key(key, size);
  87    return hash_key;
  88 }
  89
  90 struct translate * translate_cache_find(struct translate_cache *cache,
  91                                         struct translate_key *key)
  92 {
  93    unsigned hash_key = create_key(key);
  94    struct translate *translate = (struct translate*)
  95       cso_hash_find_data_from_template(cache->hash,
  96                                        hash_key,
  97                                        key, sizeof(*key));
  98
  99    if (!translate) {
 100       /* create/insert */
 101       translate = translate_create(key);
 102       cso_hash_insert(cache->hash, hash_key, translate);
 103    }
 104
 105    return translate;
 106 }