Re: [libmicrohttpd] epoll documentation and code discrepancy

[Christian Grothoff]

On 12/28/2015 02:19 PM, Sebastiano Merlino wrote:
> Hell,
> I've been using libmicrohttpd for quite a while now (thank you for all
> the hard work you have been doing over the years). I was updating some
> of my code to use epoll these days and I noticed the documentation
> saying about MHD_USE_EPOLL_LINUX_ONLY:
> 
> "This option is only available on Linux systems and only works in
> conjunction with MHD_USE_THREAD_PER_CONNECTION (at this point)."

This is wrong, but I cannot find it in the documentation. I've checked
both the microhttpd.h header and the TexInfo manual. Could you please
point us to where this (old) typo still persists?

> Using a combination of MHD_USE_THREAD_PER_CONNECTION and
> MHD_USE_EPOLL_LINUX_ONLY caused the daemon to be returned as NULL -
> looking at the code I see and error and the following message:
> 
> "Combining MHD_USE_THREAD_PER_CONNECTION and MHD_USE_EPOLL_LINUX_ONLY is
> not supported."

This is correct.

> Is the use of epoll reserved just to INTERNAL_SELECT?

No, epoll() now works for everything except "thread per connection",
which doesn't need select/poll/epoll as it uses blocking IO.

Happy hacking!

Christian

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