question

[1032120121]

when checking that key had expired in function Walk, another thread invoke Put to add the same key, Whether deleted newest key?

[1032120121]

in simplecache module, line 66 to 73

[1032120121]

if expired(now, ci) { . // return true
// <---- insert a newest same key

    this.shardMap.Del(k)

}

[ligang1109]

Insert and Delete will use sync.RWMutex for lock, so it depends on the order of operator.

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