diff options
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_hash_table.c')
-rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_hash_table.c | 586 |
1 files changed, 293 insertions, 293 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_hash_table.c b/mesalib/src/gallium/auxiliary/util/u_hash_table.c index 417cc15be..5604e3ac3 100644 --- a/mesalib/src/gallium/auxiliary/util/u_hash_table.c +++ b/mesalib/src/gallium/auxiliary/util/u_hash_table.c @@ -1,293 +1,293 @@ -/**************************************************************************
- *
- * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
- * 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 TUNGSTEN GRAPHICS 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.
- *
- **************************************************************************/
-
-/**
- * @file
- * General purpose hash table implementation.
- *
- * Just uses the cso_hash for now, but it might be better switch to a linear
- * probing hash table implementation at some point -- as it is said they have
- * better lookup and cache performance and it appears to be possible to write
- * a lock-free implementation of such hash tables .
- *
- * @author José Fonseca <jrfonseca@tungstengraphics.com>
- */
-
-
-#include "pipe/p_compiler.h"
-#include "util/u_debug.h"
-
-#include "cso_cache/cso_hash.h"
-
-#include "util/u_memory.h"
-#include "util/u_hash_table.h"
-
-
-struct util_hash_table
-{
- struct cso_hash *cso;
-
- /** Hash function */
- unsigned (*hash)(void *key);
-
- /** Compare two keys */
- int (*compare)(void *key1, void *key2);
-
- /* TODO: key, value destructors? */
-};
-
-
-struct util_hash_table_item
-{
- void *key;
- void *value;
-};
-
-
-static INLINE struct util_hash_table_item *
-util_hash_table_item(struct cso_hash_iter iter)
-{
- return (struct util_hash_table_item *)cso_hash_iter_data(iter);
-}
-
-
-struct util_hash_table *
-util_hash_table_create(unsigned (*hash)(void *key),
- int (*compare)(void *key1, void *key2))
-{
- struct util_hash_table *ht;
-
- ht = MALLOC_STRUCT(util_hash_table);
- if(!ht)
- return NULL;
-
- ht->cso = cso_hash_create();
- if(!ht->cso) {
- FREE(ht);
- return NULL;
- }
-
- ht->hash = hash;
- ht->compare = compare;
-
- return ht;
-}
-
-
-static INLINE struct cso_hash_iter
-util_hash_table_find_iter(struct util_hash_table *ht,
- void *key,
- unsigned key_hash)
-{
- struct cso_hash_iter iter;
- struct util_hash_table_item *item;
-
- iter = cso_hash_find(ht->cso, key_hash);
- while (!cso_hash_iter_is_null(iter)) {
- item = (struct util_hash_table_item *)cso_hash_iter_data(iter);
- if (!ht->compare(item->key, key))
- break;
- iter = cso_hash_iter_next(iter);
- }
-
- return iter;
-}
-
-
-static INLINE struct util_hash_table_item *
-util_hash_table_find_item(struct util_hash_table *ht,
- void *key,
- unsigned key_hash)
-{
- struct cso_hash_iter iter;
- struct util_hash_table_item *item;
-
- iter = cso_hash_find(ht->cso, key_hash);
- while (!cso_hash_iter_is_null(iter)) {
- item = (struct util_hash_table_item *)cso_hash_iter_data(iter);
- if (!ht->compare(item->key, key))
- return item;
- iter = cso_hash_iter_next(iter);
- }
-
- return NULL;
-}
-
-
-enum pipe_error
-util_hash_table_set(struct util_hash_table *ht,
- void *key,
- void *value)
-{
- unsigned key_hash;
- struct util_hash_table_item *item;
- struct cso_hash_iter iter;
-
- assert(ht);
- if (!ht)
- return PIPE_ERROR_BAD_INPUT;
-
- key_hash = ht->hash(key);
-
- item = util_hash_table_find_item(ht, key, key_hash);
- if(item) {
- /* TODO: key/value destruction? */
- item->value = value;
- return PIPE_OK;
- }
-
- item = MALLOC_STRUCT(util_hash_table_item);
- if(!item)
- return PIPE_ERROR_OUT_OF_MEMORY;
-
- item->key = key;
- item->value = value;
-
- iter = cso_hash_insert(ht->cso, key_hash, item);
- if(cso_hash_iter_is_null(iter)) {
- FREE(item);
- return PIPE_ERROR_OUT_OF_MEMORY;
- }
-
- return PIPE_OK;
-}
-
-
-void *
-util_hash_table_get(struct util_hash_table *ht,
- void *key)
-{
- unsigned key_hash;
- struct util_hash_table_item *item;
-
- assert(ht);
- if (!ht)
- return NULL;
-
- key_hash = ht->hash(key);
-
- item = util_hash_table_find_item(ht, key, key_hash);
- if(!item)
- return NULL;
-
- return item->value;
-}
-
-
-void
-util_hash_table_remove(struct util_hash_table *ht,
- void *key)
-{
- unsigned key_hash;
- struct cso_hash_iter iter;
- struct util_hash_table_item *item;
-
- assert(ht);
- if (!ht)
- return;
-
- key_hash = ht->hash(key);
-
- iter = util_hash_table_find_iter(ht, key, key_hash);
- if(cso_hash_iter_is_null(iter))
- return;
-
- item = util_hash_table_item(iter);
- assert(item);
- FREE(item);
-
- cso_hash_erase(ht->cso, iter);
-}
-
-
-void
-util_hash_table_clear(struct util_hash_table *ht)
-{
- struct cso_hash_iter iter;
- struct util_hash_table_item *item;
-
- assert(ht);
- if (!ht)
- return;
-
- iter = cso_hash_first_node(ht->cso);
- while (!cso_hash_iter_is_null(iter)) {
- item = (struct util_hash_table_item *)cso_hash_take(ht->cso, cso_hash_iter_key(iter));
- FREE(item);
- iter = cso_hash_first_node(ht->cso);
- }
-}
-
-
-enum pipe_error
-util_hash_table_foreach(struct util_hash_table *ht,
- enum pipe_error (*callback)
- (void *key, void *value, void *data),
- void *data)
-{
- struct cso_hash_iter iter;
- struct util_hash_table_item *item;
- enum pipe_error result;
-
- assert(ht);
- if (!ht)
- return PIPE_ERROR_BAD_INPUT;
-
- iter = cso_hash_first_node(ht->cso);
- while (!cso_hash_iter_is_null(iter)) {
- item = (struct util_hash_table_item *)cso_hash_iter_data(iter);
- result = callback(item->key, item->value, data);
- if(result != PIPE_OK)
- return result;
- iter = cso_hash_iter_next(iter);
- }
-
- return PIPE_OK;
-}
-
-
-void
-util_hash_table_destroy(struct util_hash_table *ht)
-{
- struct cso_hash_iter iter;
- struct util_hash_table_item *item;
-
- assert(ht);
- if (!ht)
- return;
-
- iter = cso_hash_first_node(ht->cso);
- while (!cso_hash_iter_is_null(iter)) {
- item = (struct util_hash_table_item *)cso_hash_iter_data(iter);
- FREE(item);
- iter = cso_hash_iter_next(iter);
- }
-
- cso_hash_delete(ht->cso);
-
- FREE(ht);
-}
+/************************************************************************** + * + * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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 TUNGSTEN GRAPHICS 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. + * + **************************************************************************/ + +/** + * @file + * General purpose hash table implementation. + * + * Just uses the cso_hash for now, but it might be better switch to a linear + * probing hash table implementation at some point -- as it is said they have + * better lookup and cache performance and it appears to be possible to write + * a lock-free implementation of such hash tables . + * + * @author José Fonseca <jrfonseca@tungstengraphics.com> + */ + + +#include "pipe/p_compiler.h" +#include "util/u_debug.h" + +#include "cso_cache/cso_hash.h" + +#include "util/u_memory.h" +#include "util/u_hash_table.h" + + +struct util_hash_table +{ + struct cso_hash *cso; + + /** Hash function */ + unsigned (*hash)(void *key); + + /** Compare two keys */ + int (*compare)(void *key1, void *key2); + + /* TODO: key, value destructors? */ +}; + + +struct util_hash_table_item +{ + void *key; + void *value; +}; + + +static INLINE struct util_hash_table_item * +util_hash_table_item(struct cso_hash_iter iter) +{ + return (struct util_hash_table_item *)cso_hash_iter_data(iter); +} + + +struct util_hash_table * +util_hash_table_create(unsigned (*hash)(void *key), + int (*compare)(void *key1, void *key2)) +{ + struct util_hash_table *ht; + + ht = MALLOC_STRUCT(util_hash_table); + if(!ht) + return NULL; + + ht->cso = cso_hash_create(); + if(!ht->cso) { + FREE(ht); + return NULL; + } + + ht->hash = hash; + ht->compare = compare; + + return ht; +} + + +static INLINE struct cso_hash_iter +util_hash_table_find_iter(struct util_hash_table *ht, + void *key, + unsigned key_hash) +{ + struct cso_hash_iter iter; + struct util_hash_table_item *item; + + iter = cso_hash_find(ht->cso, key_hash); + while (!cso_hash_iter_is_null(iter)) { + item = (struct util_hash_table_item *)cso_hash_iter_data(iter); + if (!ht->compare(item->key, key)) + break; + iter = cso_hash_iter_next(iter); + } + + return iter; +} + + +static INLINE struct util_hash_table_item * +util_hash_table_find_item(struct util_hash_table *ht, + void *key, + unsigned key_hash) +{ + struct cso_hash_iter iter; + struct util_hash_table_item *item; + + iter = cso_hash_find(ht->cso, key_hash); + while (!cso_hash_iter_is_null(iter)) { + item = (struct util_hash_table_item *)cso_hash_iter_data(iter); + if (!ht->compare(item->key, key)) + return item; + iter = cso_hash_iter_next(iter); + } + + return NULL; +} + + +enum pipe_error +util_hash_table_set(struct util_hash_table *ht, + void *key, + void *value) +{ + unsigned key_hash; + struct util_hash_table_item *item; + struct cso_hash_iter iter; + + assert(ht); + if (!ht) + return PIPE_ERROR_BAD_INPUT; + + key_hash = ht->hash(key); + + item = util_hash_table_find_item(ht, key, key_hash); + if(item) { + /* TODO: key/value destruction? */ + item->value = value; + return PIPE_OK; + } + + item = MALLOC_STRUCT(util_hash_table_item); + if(!item) + return PIPE_ERROR_OUT_OF_MEMORY; + + item->key = key; + item->value = value; + + iter = cso_hash_insert(ht->cso, key_hash, item); + if(cso_hash_iter_is_null(iter)) { + FREE(item); + return PIPE_ERROR_OUT_OF_MEMORY; + } + + return PIPE_OK; +} + + +void * +util_hash_table_get(struct util_hash_table *ht, + void *key) +{ + unsigned key_hash; + struct util_hash_table_item *item; + + assert(ht); + if (!ht) + return NULL; + + key_hash = ht->hash(key); + + item = util_hash_table_find_item(ht, key, key_hash); + if(!item) + return NULL; + + return item->value; +} + + +void +util_hash_table_remove(struct util_hash_table *ht, + void *key) +{ + unsigned key_hash; + struct cso_hash_iter iter; + struct util_hash_table_item *item; + + assert(ht); + if (!ht) + return; + + key_hash = ht->hash(key); + + iter = util_hash_table_find_iter(ht, key, key_hash); + if(cso_hash_iter_is_null(iter)) + return; + + item = util_hash_table_item(iter); + assert(item); + FREE(item); + + cso_hash_erase(ht->cso, iter); +} + + +void +util_hash_table_clear(struct util_hash_table *ht) +{ + struct cso_hash_iter iter; + struct util_hash_table_item *item; + + assert(ht); + if (!ht) + return; + + iter = cso_hash_first_node(ht->cso); + while (!cso_hash_iter_is_null(iter)) { + item = (struct util_hash_table_item *)cso_hash_take(ht->cso, cso_hash_iter_key(iter)); + FREE(item); + iter = cso_hash_first_node(ht->cso); + } +} + + +enum pipe_error +util_hash_table_foreach(struct util_hash_table *ht, + enum pipe_error (*callback) + (void *key, void *value, void *data), + void *data) +{ + struct cso_hash_iter iter; + struct util_hash_table_item *item; + enum pipe_error result; + + assert(ht); + if (!ht) + return PIPE_ERROR_BAD_INPUT; + + iter = cso_hash_first_node(ht->cso); + while (!cso_hash_iter_is_null(iter)) { + item = (struct util_hash_table_item *)cso_hash_iter_data(iter); + result = callback(item->key, item->value, data); + if(result != PIPE_OK) + return result; + iter = cso_hash_iter_next(iter); + } + + return PIPE_OK; +} + + +void +util_hash_table_destroy(struct util_hash_table *ht) +{ + struct cso_hash_iter iter; + struct util_hash_table_item *item; + + assert(ht); + if (!ht) + return; + + iter = cso_hash_first_node(ht->cso); + while (!cso_hash_iter_is_null(iter)) { + item = (struct util_hash_table_item *)cso_hash_iter_data(iter); + FREE(item); + iter = cso_hash_iter_next(iter); + } + + cso_hash_delete(ht->cso); + + FREE(ht); +} |