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Re: read() call in timer_cb

From: Daniel Stenberg via curl-library <curl-library_at_cool.haxx.se>
Date: Mon, 8 Jun 2020 23:35:54 +0200 (CEST)

On Mon, 8 Jun 2020, James Read via curl-library wrote:

> This is because my web crawler uses this function and the read() call seems
> to be causing problems with my web crawler.
>
> What is the read() call for?

Obviously it reads from the file descriptor created by timerfd_create(). Which
is a Linux timer API.

> It has been suggested to me elsewhere that I could use select instead. Is
> that right?

Instead of epoll you mean? If you intend to use the multi_socket API then
using select is not advisable, as it really is not suitable for event-based
systems.

> What would the behaviour of the program be if the read call was simply
> taken out?

I can't answer that, I really don't know that interface. 

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Received on 2020-06-08