aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/util/hash_table.c
diff options
context:
space:
mode:
Diffstat (limited to 'mesalib/src/util/hash_table.c')
-rw-r--r--mesalib/src/util/hash_table.c46
1 files changed, 23 insertions, 23 deletions
diff --git a/mesalib/src/util/hash_table.c b/mesalib/src/util/hash_table.c
index 0ad038377..3247593c1 100644
--- a/mesalib/src/util/hash_table.c
+++ b/mesalib/src/util/hash_table.c
@@ -232,7 +232,7 @@ hash_table_insert(struct hash_table *ht, uint32_t hash,
const void *key, void *data);
static void
-_mesa_hash_table_rehash(struct hash_table *ht, int new_size_index)
+_mesa_hash_table_rehash(struct hash_table *ht, unsigned new_size_index)
{
struct hash_table old_ht;
struct hash_entry *table, *entry;
@@ -267,6 +267,7 @@ hash_table_insert(struct hash_table *ht, uint32_t hash,
const void *key, void *data)
{
uint32_t start_hash_address, hash_address;
+ struct hash_entry *available_entry = NULL;
if (ht->entries >= ht->max_entries) {
_mesa_hash_table_rehash(ht, ht->size_index + 1);
@@ -281,13 +282,11 @@ hash_table_insert(struct hash_table *ht, uint32_t hash,
uint32_t double_hash;
if (!entry_is_present(ht, entry)) {
- if (entry_is_deleted(ht, entry))
- ht->deleted_entries--;
- entry->hash = hash;
- entry->key = key;
- entry->data = data;
- ht->entries++;
- return entry;
+ /* Stash the first available entry we find */
+ if (available_entry == NULL)
+ available_entry = entry;
+ if (entry_is_free(entry))
+ break;
}
/* Implement replacement when another insert happens
@@ -314,6 +313,16 @@ hash_table_insert(struct hash_table *ht, uint32_t hash,
hash_address = (hash_address + double_hash) % ht->size;
} while (hash_address != start_hash_address);
+ if (available_entry) {
+ if (entry_is_deleted(ht, available_entry))
+ ht->deleted_entries--;
+ available_entry->hash = hash;
+ available_entry->key = key;
+ available_entry->data = data;
+ ht->entries++;
+ return available_entry;
+ }
+
/* We could hit here if a required resize failed. An unchecked-malloc
* application could ignore this result.
*/
@@ -334,8 +343,8 @@ _mesa_hash_table_insert(struct hash_table *ht, const void *key, void *data)
}
struct hash_entry *
-_mesa_hash_table_insert_with_hash(struct hash_table *ht, uint32_t hash,
- const void *key, void *data)
+_mesa_hash_table_insert_pre_hashed(struct hash_table *ht, uint32_t hash,
+ const void *key, void *data)
{
assert(ht->key_hash_function == NULL || hash == ht->key_hash_function(key));
return hash_table_insert(ht, hash, key, data);
@@ -431,27 +440,18 @@ _mesa_hash_table_random_entry(struct hash_table *ht,
uint32_t
_mesa_hash_data(const void *data, size_t size)
{
- uint32_t hash = 2166136261ul;
- const uint8_t *bytes = data;
-
- while (size-- != 0) {
- hash ^= *bytes;
- hash = hash * 0x01000193;
- bytes++;
- }
-
- return hash;
+ return _mesa_fnv32_1a_accumulate_block(_mesa_fnv32_1a_offset_bias,
+ data, size);
}
/** FNV-1a string hash implementation */
uint32_t
_mesa_hash_string(const char *key)
{
- uint32_t hash = 2166136261ul;
+ uint32_t hash = _mesa_fnv32_1a_offset_bias;
while (*key != 0) {
- hash ^= *key;
- hash = hash * 0x01000193;
+ hash = _mesa_fnv32_1a_accumulate(hash, *key);
key++;
}