X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu%2Frculfhash.h;h=9dcaf02c42ae9dbc2b0dc7d55424390e251bb0d8;hp=f4f3373298492b3dee1e71f35277a310af735dd7;hb=0422d92c2d658f6093b8209f75808efd2109a110;hpb=5f74363e048fb82d7ad97a780eadbeb063840787 diff --git a/urcu/rculfhash.h b/urcu/rculfhash.h index f4f3373..9dcaf02 100644 --- a/urcu/rculfhash.h +++ b/urcu/rculfhash.h @@ -84,11 +84,13 @@ struct cds_lfht; typedef unsigned long (*cds_lfht_hash_fct)(void *key, size_t length, unsigned long seed); -typedef unsigned long (*cds_lfht_compare_fct)(void *key1, size_t key1_len, - void *key2, size_t key2_len); +typedef int (*cds_lfht_match_fct)(struct cds_lfht_node *node, void *key); /* * cds_lfht_node_init - initialize a hash table node + * @node: the node to initialize. + * @key: pointer to the key to use. + * @key_len: the length of the key, in bytes. */ static inline void cds_lfht_node_init(struct cds_lfht_node *node, void *key, @@ -109,10 +111,7 @@ enum { /* * _cds_lfht_new - API used by cds_lfht_new wrapper. Do not use directly. */ -struct cds_lfht *_cds_lfht_new(cds_lfht_hash_fct hash_fct, - cds_lfht_compare_fct compare_fct, - unsigned long hash_seed, - unsigned long init_size, +struct cds_lfht *_cds_lfht_new(unsigned long init_size, unsigned long min_alloc_size, int flags, void (*cds_lfht_call_rcu)(struct rcu_head *head, @@ -128,9 +127,6 @@ struct cds_lfht *_cds_lfht_new(cds_lfht_hash_fct hash_fct, /* * cds_lfht_new - allocate a hash table. - * @hash_fct: the hashing function. - * @compare_fct: the key comparison function. - * @hash_seed: the seed for hash function. * @init_size: number of nodes to allocate initially. Must be power of two. * @min_alloc_size: the smallest allocation size to use. Must be power of two. * @flags: hash table creation flags (can be combined with bitwise or: '|'). @@ -151,16 +147,12 @@ struct cds_lfht *_cds_lfht_new(cds_lfht_hash_fct hash_fct, * Threads calling this API need to be registered RCU read-side threads. */ static inline -struct cds_lfht *cds_lfht_new(cds_lfht_hash_fct hash_fct, - cds_lfht_compare_fct compare_fct, - unsigned long hash_seed, - unsigned long init_size, +struct cds_lfht *cds_lfht_new(unsigned long init_size, unsigned long min_alloc_size, int flags, pthread_attr_t *attr) { - return _cds_lfht_new(hash_fct, compare_fct, hash_seed, - init_size, min_alloc_size, flags, + return _cds_lfht_new(init_size, min_alloc_size, flags, call_rcu, synchronize_rcu, rcu_read_lock, rcu_read_unlock, rcu_thread_offline, rcu_thread_online, rcu_register_thread, @@ -187,6 +179,7 @@ int cds_lfht_destroy(struct cds_lfht *ht, pthread_attr_t **attr); * @count: Traverse the hash table, count the number of nodes observed. * @removed: Number of logically removed nodes observed during traversal. * @split_count_after: Sample the node count split-counter after traversal. + * * Call with rcu_read_lock held. * Threads calling this API need to be registered RCU read-side threads. */ @@ -198,16 +191,22 @@ void cds_lfht_count_nodes(struct cds_lfht *ht, /* * cds_lfht_lookup - lookup a node by key. + * @ht: the hash table. + * @match: the key match function. + * @hash: the key hash. + * @iter: Node, if found (output). *iter->node set to NULL if not found. * - * Output in "*iter". *iter->node set to NULL if not found. * Call with rcu_read_lock held. * Threads calling this API need to be registered RCU read-side threads. */ -void cds_lfht_lookup(struct cds_lfht *ht, void *key, size_t key_len, - struct cds_lfht_iter *iter); +void cds_lfht_lookup(struct cds_lfht *ht, cds_lfht_match_fct match, + unsigned long hash, void *key, struct cds_lfht_iter *iter); /* * cds_lfht_next_duplicate - get the next item with same key (after a lookup). + * @ht: the hash table. + * @match: the key match function. + * @iter: Node, if found (output). *iter->node set to NULL if not found. * * Uses an iterator initialized by a lookup. * Sets *iter-node to the following node with same key. @@ -218,10 +217,13 @@ void cds_lfht_lookup(struct cds_lfht *ht, void *key, size_t key_len, * Call with rcu_read_lock held. * Threads calling this API need to be registered RCU read-side threads. */ -void cds_lfht_next_duplicate(struct cds_lfht *ht, struct cds_lfht_iter *iter); +void cds_lfht_next_duplicate(struct cds_lfht *ht, + cds_lfht_match_fct match, struct cds_lfht_iter *iter); /* * cds_lfht_first - get the first node in the table. + * @ht: the hash table. + * @iter: First node, if exists (output). *iter->node set to NULL if not found. * * Output in "*iter". *iter->node set to NULL if table is empty. * Call with rcu_read_lock held. @@ -231,6 +233,8 @@ void cds_lfht_first(struct cds_lfht *ht, struct cds_lfht_iter *iter); /* * cds_lfht_next - get the next node in the table. + * @ht: the hash table. + * @iter: Next node, if exists (output). *iter->node set to NULL if not found. * * Input/Output in "*iter". *iter->node set to NULL if *iter was * pointing to the last table node. @@ -241,15 +245,22 @@ void cds_lfht_next(struct cds_lfht *ht, struct cds_lfht_iter *iter); /* * cds_lfht_add - add a node to the hash table. + * @ht: the hash table. + * @hash: the key hash. + * @node: the node to add. * * This function supports adding redundant keys into the table. * Call with rcu_read_lock held. * Threads calling this API need to be registered RCU read-side threads. */ -void cds_lfht_add(struct cds_lfht *ht, struct cds_lfht_node *node); +void cds_lfht_add(struct cds_lfht *ht, unsigned long hash, + struct cds_lfht_node *node); /* * cds_lfht_add_unique - add a node to hash table, if key is not present. + * @ht: the hash table. + * @match: the key match function. + * @node: the node to try adding. * * Return the node added upon success. * Return the unique node already present upon failure. If @@ -264,10 +275,15 @@ void cds_lfht_add(struct cds_lfht *ht, struct cds_lfht_node *node); * add_unique and add_replace (see below). */ struct cds_lfht_node *cds_lfht_add_unique(struct cds_lfht *ht, + cds_lfht_match_fct match, + unsigned long hash, struct cds_lfht_node *node); /* * cds_lfht_add_replace - replace or add a node within hash table. + * @ht: the hash table. + * @match: the key match function. + * @node: the node to add. * * Return the node replaced upon success. If no node matching the key * was present, return NULL, which also means the operation succeeded. @@ -288,10 +304,15 @@ struct cds_lfht_node *cds_lfht_add_unique(struct cds_lfht *ht, * will never generate duplicated keys. */ struct cds_lfht_node *cds_lfht_add_replace(struct cds_lfht *ht, + cds_lfht_match_fct match, + unsigned long hash, struct cds_lfht_node *node); /* * cds_lfht_replace - replace a node pointer to by iter within hash table. + * @ht: the hash table. + * @old_iter: the iterator position of the node to replace. + * @now_node: the new node to try using for replacement. * * Return 0 if replacement is successful, negative value otherwise. * Replacing a NULL old node or an already removed node will fail with a @@ -319,6 +340,8 @@ int cds_lfht_replace(struct cds_lfht *ht, struct cds_lfht_iter *old_iter, /* * cds_lfht_del - remove node pointed to by iterator from hash table. + * @ht: the hash table. + * @iter: the iterator position of the node to delete. * * Return 0 if the node is successfully removed, negative value * otherwise. @@ -337,6 +360,7 @@ int cds_lfht_del(struct cds_lfht *ht, struct cds_lfht_iter *iter); /* * cds_lfht_resize - Force a hash table resize + * @ht: the hash table. * @new_size: update to this hash table size. * * Threads calling this API need to be registered RCU read-side threads.