when EPOLLIN and EPOLLOUT returned

[Maxim Dounin]

Hello!

On Mon, Jul 29, 2013 at 02:29:54PM +0800, yurnerola at gmail.com wrote:

> Hi,all
> I find it hard to understand in function ngx_epoll_process_events as following.
>         if ((revents & (EPOLLERR|EPOLLHUP))
>              && (revents & (EPOLLIN|EPOLLOUT)) == 0)
>         {
>             /*
>              * if the error events were returned without EPOLLIN or EPOLLOUT,
>              * then add these flags to handle the events at least in one
>              * active handler
>              */
> 
>             revents |= EPOLLIN|EPOLLOUT;
>         }
>             As the comment said we should check if ((revents & (EPOLLERR|EPOLLHUP))==0) that we can end the connection when EPOLLERR and EPOLLHUP is returned.
>  ,but why not this? Help...

Sorry, but I failed to understand your question, and likely others 
failed too.  It might be a good idea to clarify what do you want 
to know.

-- 
Maxim Dounin
http://nginx.org/en/donation.html