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#include <pthread.h>
#include <stdint.h>
#include <time.h>
#ifndef __lruc_header__
#define __lruc_header__
// ------------------------------------------
// errors
// ------------------------------------------
typedef enum {
LRUC_NO_ERROR = 0,
LRUC_MISSING_CACHE,
LRUC_MISSING_KEY,
LRUC_MISSING_VALUE,
LRUC_PTHREAD_ERROR,
LRUC_VALUE_TOO_LARGE
} lruc_error;
// ------------------------------------------
// types
// ------------------------------------------
typedef struct {
void *value;
void *key;
uint32_t value_length;
uint32_t key_length;
uint64_t access_count;
void *next;
} lruc_item;
typedef struct {
lruc_item **items;
uint64_t access_count;
uint64_t free_memory;
uint64_t total_memory;
uint64_t average_item_length;
uint32_t hash_table_size;
time_t seed;
lruc_item *free_items;
pthread_mutex_t *mutex;
} lruc;
// ------------------------------------------
// api
// ------------------------------------------
lruc *lruc_new(uint64_t cache_size, uint32_t average_length);
lruc_error lruc_free(lruc *cache);
lruc_error lruc_set(lruc *cache, void *key, uint32_t key_length, void *value, uint32_t value_length);
lruc_error lruc_get(lruc *cache, void *key, uint32_t key_length, void **value);
lruc_error lruc_delete(lruc *cache, void *key, uint32_t key_length);
#endif
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