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O(非阻塞) [复制链接]

digdeep126

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发表于 2012-02-27 14:23 |显示全部楼层

本帖最后由 digdeep126 于 2012-02-27 14:24 编辑

UNP 6.2 I/O Models
Synchronous I/O versus Asynchronous I/O
POSIX defines these two terms as follows:

A synchronous I/O operation causes the requesting process to be blocked until that I/O operation completes.

An asynchronous I/O operation does not cause the requesting process to be blocked.

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