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/**
* @file hash.h
* Hash table implementation that allows using memory pools for storage as well as using
* shared memory for this purpose
*/
#ifndef RSPAMD_HASH_H
#define RSPAMD_HASH_H
#include "config.h"
#ifdef __cplusplus
extern "C" {
#endif
struct rspamd_lru_hash_s;
typedef struct rspamd_lru_hash_s rspamd_lru_hash_t;
struct rspamd_lru_element_s;
typedef struct rspamd_lru_element_s rspamd_lru_element_t;
/**
* Create new lru hash
* @param maxsize maximum elements in a hash
* @param maxage maximum age of element
* @param hash_func pointer to hash function
* @param key_equal_func pointer to function for comparing keys
* @return new rspamd_hash object
*/
rspamd_lru_hash_t *rspamd_lru_hash_new(gint maxsize,
GDestroyNotify key_destroy,
GDestroyNotify value_destroy);
/**
* Create new lru hash
* @param maxsize maximum elements in a hash
* @param maxage maximum age of element
* @param hash_func pointer to hash function
* @param key_equal_func pointer to function for comparing keys
* @return new rspamd_hash object
*/
rspamd_lru_hash_t *rspamd_lru_hash_new_full(gint maxsize,
GDestroyNotify key_destroy,
GDestroyNotify value_destroy,
GHashFunc hfunc,
GEqualFunc eqfunc);
/**
* Lookup item from hash
* @param hash hash object
* @param key key to find
* @return value of key or NULL if key is not found
*/
gpointer rspamd_lru_hash_lookup(rspamd_lru_hash_t *hash,
gconstpointer key,
time_t now);
/**
* Removes key from LRU cache
* @param hash
* @param key
* @return TRUE if key has been found and removed
*/
gboolean rspamd_lru_hash_remove(rspamd_lru_hash_t *hash,
gconstpointer key);
/**
* Insert item in hash
* @param hash hash object
* @param key key to insert
* @param value value of key
*/
void rspamd_lru_hash_insert(rspamd_lru_hash_t *hash,
gpointer key,
gpointer value,
time_t now,
guint ttl);
/**
* Remove lru hash
* @param hash hash object
*/
void rspamd_lru_hash_destroy(rspamd_lru_hash_t *hash);
/**
* Iterate over lru hash. Iterations must start from it=0 and are done when it==-1
* @param hash
* @param it
* @param k
* @param v
* @return new it or -1 if iteration has been reached over
*/
int rspamd_lru_hash_foreach(rspamd_lru_hash_t *hash, int it, gpointer *k,
gpointer *v);
/**
* Returns number of elements in a hash
* @param hash hash object
*/
guint rspamd_lru_hash_size(rspamd_lru_hash_t *hash);
/**
* Returns hash capacity
* @param hash hash object
*/
guint rspamd_lru_hash_capacity(rspamd_lru_hash_t *hash);
#ifdef __cplusplus
}
#endif
#endif
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