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/**************************************************************************
*
* Copyright 2008 VMware, Inc.
* 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 VMWARE 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 <jfonseca@vmware.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_pointer.h"
#include "util/u_hash_table.h"
#include "util/hash_table.h"
#include "ralloc.h"
struct util_hash_table
{
struct hash_table table;
/** free value */
void (*destroy)(void *value);
};
struct util_hash_table *
util_hash_table_create(uint32_t (*hash)(const void *key),
bool (*equal)(const void *key1, const void *key2),
void (*destroy)(void *value))
{
struct util_hash_table *ht;
ht = ralloc(NULL, struct util_hash_table);
if(!ht)
return NULL;
if (!_mesa_hash_table_init(&ht->table, ht, hash, equal)) {
ralloc_free(ht);
return NULL;
}
ht->destroy = destroy;
return ht;
}
enum pipe_error
util_hash_table_set(struct util_hash_table *ht,
void *key,
void *value)
{
uint32_t key_hash;
struct hash_entry *item;
assert(ht);
if (!ht)
return PIPE_ERROR_BAD_INPUT;
if (!key)
return PIPE_ERROR_BAD_INPUT;
key_hash = ht->table.key_hash_function(key);
item = _mesa_hash_table_search_pre_hashed(&ht->table, key_hash, key);
if(item) {
ht->destroy(item->data);
item->data = value;
return PIPE_OK;
}
item = _mesa_hash_table_insert_pre_hashed(&ht->table, key_hash, key, value);
if(!item)
return PIPE_ERROR_OUT_OF_MEMORY;
return PIPE_OK;
}
void *
util_hash_table_get(struct util_hash_table *ht,
void *key)
{
struct hash_entry *item;
assert(ht);
if (!ht)
return NULL;
if (!key)
return NULL;
item = _mesa_hash_table_search(&ht->table, key);
if(!item)
return NULL;
return item->data;
}
void
util_hash_table_remove(struct util_hash_table *ht,
void *key)
{
struct hash_entry *item;
assert(ht);
if (!ht)
return;
if (!key)
return;
item = _mesa_hash_table_search(&ht->table, key);
if (!item)
return;
ht->destroy(item->data);
_mesa_hash_table_remove(&ht->table, item);
}
void
util_hash_table_clear(struct util_hash_table *ht)
{
assert(ht);
if (!ht)
return;
hash_table_foreach(&ht->table, item) {
ht->destroy(item->data);
}
_mesa_hash_table_clear(&ht->table, NULL);
}
enum pipe_error
util_hash_table_foreach(struct util_hash_table *ht,
enum pipe_error (*callback)
(void *key, void *value, void *data),
void *data)
{
assert(ht);
if (!ht)
return PIPE_ERROR_BAD_INPUT;
hash_table_foreach(&ht->table, item) {
enum pipe_error result = callback((void *)item->key, item->data, data);
if (result != PIPE_OK)
return result;
}
return PIPE_OK;
}
void
util_hash_table_destroy(struct util_hash_table *ht)
{
assert(ht);
if (!ht)
return;
hash_table_foreach(&ht->table, item) {
ht->destroy(item->data);
}
ralloc_free(ht);
}
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