12.01.2017 22:23, Thomas Helland пишет:
---
src/util/hash_table.c | 22 ++++++++++++++++++++++
src/util/hash_table.h | 2 ++
2 files changed, 24 insertions(+)
diff --git a/src/util/hash_table.c b/src/util/hash_table.c
index 9e643af8b2..702f465382 100644
--- a/src/util/hash_table.c
+++ b/src/util/hash_table.c
@@ -140,6 +140,28 @@ _mesa_hash_table_create(void *mem_ctx,
return ht;
}
+struct hash_table *
+_mesa_hash_table_clone(struct hash_table *src, void *dst_mem_ctx)
+{
+ struct hash_table *ht;
+
+ ht = ralloc(dst_mem_ctx, struct hash_table);
+ if (ht == NULL)
+ return NULL;
+
+ memcpy(ht, src, sizeof(struct hash_table));
+
+ ht->table = rzalloc_array(ht, struct hash_entry, ht->size);
rzalloc is unnecessary here, ht->table is about to be overwritten.
+ if (ht->table == NULL) {
+ ralloc_free(ht);
+ return NULL;
+ }
+
+ memcpy(ht->table, src->table, ht->size * sizeof(struct hash_entry));
+
+ return ht;
+}
+
/**
* Frees the given hash table.
*
diff --git a/src/util/hash_table.h b/src/util/hash_table.h
index b35ee871bb..971b04aff2 100644
--- a/src/util/hash_table.h
+++ b/src/util/hash_table.h
@@ -62,6 +62,8 @@ _mesa_hash_table_create(void *mem_ctx,
uint32_t (*key_hash_function)(const void *key),
bool (*key_equals_function)(const void *a,
const void *b));
+struct hash_table *
+_mesa_hash_table_clone(struct hash_table *src, void *dst_mem_ctx);
void _mesa_hash_table_destroy(struct hash_table *ht,
void (*delete_function)(struct hash_entry
*entry));
void _mesa_hash_table_clear(struct hash_table *ht,
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