57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
#ifndef TOPKEYS_H
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#define TOPKEYS_H 1
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#include <memcached/engine.h>
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#include <memcached/genhash.h>
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/* A list of operations for which we have int stats */
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#define TK_OPS(C) C(get_hits) C(get_misses) C(cmd_set) C(incr_hits) \
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C(incr_misses) C(decr_hits) C(decr_misses) \
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C(delete_hits) C(delete_misses) C(evictions) \
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C(cas_hits) C(cas_badval) C(cas_misses)
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#define TK_MAX_VAL_LEN 250
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/* Update the correct stat for a given operation */
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#define TK(tk, op, key, nkey, ctime) { \
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if (tk) { \
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assert(key); \
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assert(nkey > 0); \
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pthread_mutex_lock(&tk->mutex); \
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topkey_item_t *tmp = topkeys_item_get_or_create( \
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(tk), (key), (nkey), (ctime)); \
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tmp->op++; \
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pthread_mutex_unlock(&tk->mutex); \
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} \
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}
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typedef struct dlist {
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struct dlist *next;
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struct dlist *prev;
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} dlist_t;
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typedef struct topkey_item {
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dlist_t list; /* Must be at the beginning because we downcast! */
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int nkey;
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rel_time_t ctime, atime; /* Time this item was created/last accessed */
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#define TK_CUR(name) int name;
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TK_OPS(TK_CUR)
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#undef TK_CUR
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char key[]; /* A variable length array in the struct itself */
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} topkey_item_t;
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typedef struct topkeys {
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dlist_t list;
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pthread_mutex_t mutex;
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genhash_t *hash;
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int nkeys;
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int max_keys;
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} topkeys_t;
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topkeys_t *topkeys_init(int max_keys);
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void topkeys_free(topkeys_t *topkeys);
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topkey_item_t *topkeys_item_get_or_create(topkeys_t *tk, const void *key, size_t nkey, const rel_time_t ctime);
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ENGINE_ERROR_CODE topkeys_stats(topkeys_t *tk, const void *cookie, const rel_time_t current_time, ADD_STAT add_stat);
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#endif
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