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                [TOC] ``` typedef struct redisObject { // 類型 unsigned type:4; // 編碼 unsigned encoding:4; // 對象最后一次被訪問的時間 unsigned lru:REDIS_LRU_BITS; /* lru time (relative to server.lruclock) */ // 引用計數 int refcount; // 指向實際值的指針 void *ptr; } robj; ``` 好奇 unsigned 變量名:4,占用多少字節,整個redisObject占用多少字節 參考:https://www.cnblogs.com/Jacket-K/p/8365384.html http://blog.chinaunix.net/uid-20726927-id-2455478.html 得出結論:unsigned type:4 ,是一個占用4位的位域,sizeof(struct robj) 在64位系統,是 4+4+24+32+64 = 128位 = 16字節
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