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Can we use the select syscall and non-blocking read/write to do asynchronous I/O within a single thread or process?

April 26, 2017asynchronous non-blocking process read select syscall thread write

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Can we use the select syscall and non-blocking read/write to do asynchronous I/O within a single thread or process?

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Sure, if you understand its interface well. As with any kernel modification, just make sure you specify the intended interface unambiguously. You might find the select manpage useful, although you might not; UNIX manpages tend to be references, not tutorials.