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a queue by golang's channel
getInIndex
函数里 for !q.inoffset.CompareAndSwap(n, m) {
有可能是一个死循环,你只获取了一次 n 然后一直比较其和 inoffset 的值是否相等,这可能永远不能成功。 正确的做法是每次失败后重新获取新的 inoffset 值,再开启下一次 cas 。另外这种 cas 锁也不要无限循环下去,会让风扇嗡嗡响😂
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