typedef struct sl skiplist_t;
skiplist_t * sl_alloc (void);
uint64_t sl_lookup (skiplist_t *sl, const void *key_data, uint32_t key_len);
typedef struct sl skiplist_t;
skiplist_t * sl_alloc (void);
uint64_t sl_lookup (skiplist_t *sl, const void *key_data, uint32_t key_len);