gaoan000
V2EX  ›  C

有一个关于 KFIFO 的疑惑,请帮忙指点一下

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  •   gaoan000 · Apr 23, 2021 · 1870 views
    This topic created in 1872 days ago, the information mentioned may be changed or developed.
    假如有一个队列 uchar buff[8], 有 uchar in = 2, uchar out = 246
    D D * * * * D D (D:数据, *:空间)
    如果放 5 个字节进入队列,根据网上搜到文章的公式
    len = Min(len, size - in + out) //在剩余空间和写入字符间取小值
    len = Min(5, 252) //5
    但是剩余的空间只有 4 这个想了半天没明白我错在哪.
    求高手指点解惑,谢谢!
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