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p & 3 含义是什么 #32

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YIDWang opened this issue Jan 31, 2019 · 0 comments

YIDWang commented Jan 31, 2019

while((unsigned long)p & 3 && count)
在 redis bitcount实现中说不足32 bit的直接使用这个这个循环进行计算。但是不理解 p&3 什么含义。
似乎跟32bit 没什么关系

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