translate_cache.c revision 4a49301e 
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
36struct translate_cache {
37   struct cso_hash *hash;
38};
39
40struct translate_cache * translate_cache_create( void )
41{
42   struct translate_cache *cache = MALLOC_STRUCT(translate_cache);
43   cache->hash = cso_hash_create();
44   return cache;
45}
46
47
48static INLINE void delete_translates(struct translate_cache *cache)
49{
50   struct cso_hash *hash = cache->hash;
51   struct cso_hash_iter iter = cso_hash_first_node(hash);
52   while (!cso_hash_iter_is_null(iter)) {
53      struct translate *state = (struct translate*)cso_hash_iter_data(iter);
54      iter = cso_hash_iter_next(iter);
55      if (state) {
56         state->release(state);
57      }
58   }
59}
60
61void translate_cache_destroy(struct translate_cache *cache)
62{
63   delete_translates(cache);
64   cso_hash_delete(cache->hash);
65   FREE(cache);
66}
67
68
69static INLINE unsigned translate_hash_key_size(struct translate_key *key)
70{
71   unsigned size = sizeof(struct translate_key) -
72                   sizeof(struct translate_element) * (PIPE_MAX_ATTRIBS - key->nr_elements);
73   return size;
74}
75
76static INLINE unsigned create_key(struct translate_key *key)
77{
78   unsigned hash_key;
79   unsigned size = translate_hash_key_size(key);
80   /*debug_printf("key size = %d, (els = %d)\n",
81     size, key->nr_elements);*/
82   hash_key = cso_construct_key(key, size);
83   return hash_key;
84}
85
86struct translate * translate_cache_find(struct translate_cache *cache,
87                                        struct translate_key *key)
88{
89   unsigned hash_key = create_key(key);
90   struct translate *translate = (struct translate*)
91      cso_hash_find_data_from_template(cache->hash,
92                                       hash_key,
93                                       key, sizeof(*key));
94
95   if (!translate) {
96      /* create/insert */
97      translate = translate_create(key);
98      cso_hash_insert(cache->hash, hash_key, translate);
99   }
100
101   return translate;
102}
103