43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
#ifndef ASSOC_H
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#define ASSOC_H
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struct assoc {
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/* how many powers of 2's worth of buckets we use */
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unsigned int hashpower;
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/* Main hash table. This is where we look except during expansion. */
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hash_item** primary_hashtable;
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/*
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* Previous hash table. During expansion, we look here for keys that haven't
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* been moved over to the primary yet.
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*/
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hash_item** old_hashtable;
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/* Number of items in the hash table. */
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unsigned int hash_items;
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/* Flag: Are we in the middle of expanding now? */
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bool expanding;
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/*
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* During expansion we migrate values with bucket granularity; this is how
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* far we've gotten so far. Ranges from 0 .. hashsize(hashpower - 1) - 1.
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*/
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unsigned int expand_bucket;
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};
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/* associative array */
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ENGINE_ERROR_CODE assoc_init(struct default_engine *engine);
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hash_item *assoc_find(struct default_engine *engine, uint32_t hash,
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const char *key, const size_t nkey);
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int assoc_insert(struct default_engine *engine, uint32_t hash,
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hash_item *item);
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void assoc_delete(struct default_engine *engine, uint32_t hash,
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const char *key, const size_t nkey);
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int start_assoc_maintenance_thread(struct default_engine *engine);
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void stop_assoc_maintenance_thread(struct default_engine *engine);
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#endif
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