How do you use AIO and epoll together in a single event loop?

Question

How can you combine AIO and epoll together in a single event loop?

Google finds lots of talk from 2002 and 2003 about unifying them, but its unclear if anything happened, or if it's possible.

Has anyone rolled-their-own with an epoll loop using eventfd for the aio signal?

Realise this is very old question, but you could use 'signalfd' for the signal from aio — Steve Lorimer, May 25 '13 at 00:33
Are you referring to POSIX AIO or Linux AIO? The latter allows to register an eventfd for completion notifications. And that eventfd you could add to your epoll fd set. — maxschlepzig, May 15 '21 at 09:47

score 5 · Accepted Answer · answered Dec 01 '09 at 11:51

5

try libevent:

there are patches to support both.

answered Dec 01 '09 at 11:51

Ass3mbler

The new libeevent 2.0 is going completion-based: http://google-opensource.blogspot.com/2010/01/libevent-20x-like-libevent-14x-only.html - hopefully AIO will turn up as a backend so you can mix file and network descriptórs – Will Mar 25 '10 at 19:04

score 3 · Answer 2 · answered Feb 04 '10 at 07:40

3

answered Feb 04 '10 at 07:40

ury

Interestingly, according to https://oxnz.github.io/2016/10/13/linux-aio/ now there is `#include ` so there's no need to resort to `__NR_io_setup` – nponeccop Sep 02 '18 at 22:32

score 1 · Answer 3 · answered Dec 05 '09 at 16:41

1

Tried eventfd with epoll?

"A key point about an eventfd file descriptor is that it can be monitored just like any other file descriptor using select(2), poll(2), or epoll(7)."

answered Dec 05 '09 at 16:41

jcaose

score 0 · Answer 4 · edited Jan 24 '13 at 08:56

0

FreeBSD supports AIO together with Kqueue, the AIO completion can be monitored by the Kqueue interface.

edited Jan 24 '13 at 08:56

Johan B

answered Jan 24 '13 at 08:34

angel

4 Answers4