#define HOT_LRU 0

#define WARM_LRU 64

#define COLD_LRU 128

#define TEMP_LRU 192

#define CLEAR_LRU(id) (id & ~(3<<6))

#define GET_LRU(id) (id & (3<<6))

/* See items.c */

uint64_t get_cas_id(void);

void set_cas_id(uint64_t new_cas);

/*@null@*/

item *do_item_alloc(char *key, const size_t nkey, const unsigned int flags, const rel_time_t exptime, const int nbytes);

item_chunk *do_item_alloc_chunk(item_chunk *ch, const size_t bytes_remain);

item *do_item_alloc_pull(const size_t ntotal, const unsigned int id);

void item_free(item *it);

bool item_size_ok(const size_t nkey, const int flags, const int nbytes);

int  do_item_link(item *it, const uint32_t hv);     /** may fail if transgresses limits */

void do_item_unlink(item *it, const uint32_t hv);

void do_item_unlink_nolock(item *it, const uint32_t hv);

void do_item_remove(item *it);

void do_item_update(item *it);   /** update LRU time to current and reposition */

void do_item_update_nolock(item *it);

int  do_item_replace(item *it, item *new_it, const uint32_t hv);

void do_item_link_fixup(item *it);

int item_is_flushed(item *it);

unsigned int do_get_lru_size(uint32_t id);

void do_item_linktail_q(item *it);

void do_item_unlinktail_q(item *it);

item *do_item_crawl_q(item *it);

void *item_lru_bump_buf_create(void);

#define LRU_PULL_EVICT 1

#define LRU_PULL_CRAWL_BLOCKS 2

#define LRU_PULL_RETURN_ITEM 4 /* fill info struct if available */

struct lru_pull_tail_return {

    item *it;

    uint32_t hv;

};

int lru_pull_tail(const int orig_id, const int cur_lru,

        const uint64_t total_bytes, const uint8_t flags, const rel_time_t max_age,

        struct lru_pull_tail_return *ret_it);

/*@null@*/

char *item_cachedump(const unsigned int slabs_clsid, const unsigned int limit, unsigned int *bytes);

void item_stats(ADD_STAT add_stats, void *c);

void do_item_stats_add_crawl(const int i, const uint64_t reclaimed,

        const uint64_t unfetched, const uint64_t checked);

void item_stats_totals(ADD_STAT add_stats, void *c);

/*@null@*/

void item_stats_sizes(ADD_STAT add_stats, void *c);

void item_stats_sizes_init(void);

void item_stats_sizes_enable(ADD_STAT add_stats, void *c);

void item_stats_sizes_disable(ADD_STAT add_stats, void *c);

void item_stats_sizes_add(item *it);

void item_stats_sizes_remove(item *it);

bool item_stats_sizes_status(void);

/* stats getter for slab automover */

typedef struct {

    int64_t evicted;

    int64_t outofmemory;

    uint32_t age;

} item_stats_automove;

void fill_item_stats_automove(item_stats_automove *am);

item *do_item_get(const char *key, const size_t nkey, const uint32_t hv, conn *c, const bool do_update);

item *do_item_touch(const char *key, const size_t nkey, uint32_t exptime, const uint32_t hv, conn *c);

void do_item_bump(conn *c, item *it, const uint32_t hv);

void item_stats_reset(void);

extern pthread_mutex_t lru_locks[POWER_LARGEST];

int start_lru_maintainer_thread(void *arg);

int stop_lru_maintainer_thread(void);

int init_lru_maintainer(void);

void lru_maintainer_pause(void);

void lru_maintainer_resume(void);

void *lru_bump_buf_create(void);

#ifdef EXTSTORE

#define STORAGE_delete(e, it) \

    do { \

        if (it->it_flags & ITEM_HDR) { \

            item_hdr *hdr = (item_hdr *)ITEM_data(it); \

            extstore_delete(e, hdr->page_id, hdr->page_version, \

                    1, ITEM_ntotal(it)); \

        } \

    } while (0)

#else

#define STORAGE_delete(...)

#endif