【对象】
typedef struct redisObject {
unsigned type:4;【REDIS_STRING,REDIS_LIST, HASH, SET, ZSET】
unsigned encoding:4;
unsigned lru:REDIS_LRU_BITS; /* lru time (relative to server.lruclock) */ //空转时长
int refcount; //引用计数
void *ptr;
} robj;
【数据库】
typedef struct redisDb {
dict *dict; /* The keyspace for this DB */
dict *expires; /* Timeout of keys with a timeout set */
dict *blocking_keys; /* Keys with clients waiting for data (BLPOP) */
dict *ready_keys; /* Blocked keys that received a PUSH */
dict *watched_keys; /* WATCHED keys for MULTI/EXEC CAS */
int id;
long long avg_ttl; /* Average TTL, just for stats */
} redisDb;