Re: [Boost-users] Does the Proactor of boost uses edge-triggered epoll on linux?

Subject: Re: [Boost-users] Does the Proactor of boost uses edge-triggered epoll on linux?
From: Journeyer J. Joh (oosaprogrammer_at_[hidden])
Date: 2013-05-29 11:22:56

Hi Igor R,

I have one answer to your question and one new question for you and other
people.

>> Don't the following notes aswer your question?

1. I am sorry but it is no because there is no statement whether the epoll
is edge-triggered or level-triggered. It only said like the one shown below.
Linux Kernel 2.6<http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/overview/implementation.html#boost_asio.overview.implementation.linux_kernel_2_6>

Demultiplexing mechanism:
 Uses epoll for demultiplexing.

I downloaded latest boost 1.53.0 and searched for epoll_create, epoll_wait,
and many socket APIs for linux and windows but failed to find api calls for
those.

I expected that I would find api calls for those.

2. If it - boost.asio - doesn't call these api, how boost.asio implemens
it's functions?

Thank you very much.
Sincerely
Journeyer

----------------------------------------
Journeyer J. Joh
o o s a p r o g r a m m e r
a t
g m a i l  d o t  c o m
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2013/5/29 Igor R <boost.lists_at_[hidden]>

> > I have some questions about boost's async IO implementation for linux.
> >
> > 1. Does it use edge-triggered epoll to implement the Proactor (in terms
> of
> > Reactor)?
> >
> >
> http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/overview/core/async.html
> >
> > The guide above says that boost's Proactor is implemented in terms of
> > Reactor when it comes to Linux.
> >
> > If it is based on Reactor, I guess it should be level-triggered epoll.
> > 2. Am I right?
> >
> > Then my question is
> > 3. Does boost use edge-triggered epoll in any kind of async IO on linux?
> > 4. Isn't edge-triggered epoll a good method to implement async IO on
> linux?
>
>
> Don't the following notes aswer your question?
>
> http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/overview/implementation.html
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