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      1 /**************************************************************************
      2  *
      3  * Copyright 2008 VMware, Inc.
      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 VMWARE 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) {
     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) * (TRANSLATE_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 }
    107