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When to use the POLLOUT event for polling function C?

I wrote a small TCP servers socket()+ POLLIN poll() + recv()+ send(), but I do not know when to use POLLOUT poll or select writefdsto poll on record events.

Can someone give me an example of the real use of POLLOUT ?

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2 answers

A common pattern is to use non-blocking file descriptors with the poll()following:

  • In preparation for poll(),
    • Always install POLLIN, because you are always interested in reading what the other end of the socket sends.
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