Re: [Boost-users] Boost.Asio extensible to non network i/o?

Subject: Re: [Boost-users] Boost.Asio extensible to non network i/o?
From: Laurent Fert (fert.laurent.boost_at_[hidden])
Date: 2009-06-01 01:08:35

Hi,

For disk i/o, you might want to give a look at this thread:
http://osdir.com/ml/lib.boost.asio.user/2006-11/msg00002.html

Cheers,

Lau

On Mon, Jun 1, 2009 at 1:12 PM, Zachary Turner <divisortheory_at_[hidden]>wrote:

> I've been reading over the documentation for Boost.Asio and as far as I can
> tell the documentation makes no mention whatsoever about using Asio for
> anything other than sockets programming.  Suppose I wanted to implemented a
> simple file transfer client (I say client because the server will not be in
> C++) that reads files off of the disk and sends them to the server.  I'd
> like to do it asynchronously.  What would be the basic steps needed to do
> this with Boost.Asio, if it is indeed even possible?  I'd specifically like
> it to use I/O Completion Ports on Windows if possible, and whatever on
> Linux.  I'd like to be able to configure the number of worker threads on the
> backend, so that for example I can read from N files at once, or from N
> different locations in the same file.  I'd also like to have a single
> "controller" thread that receives all the events regarding when reads or
> writes complete, so that I don't have to use any kind of locking to
> synchronize things.
>
> As a final "nice-to-have", I'd like to be able to plug my own types of
> "actions" into the model, things that aren't really I/O but that I still
> want to execute asynchronously that would sit in between a completed disk
> read and the initiation of writing that same data to the socket.  Think, for
> example, of encrypting the file before sending.  I don't want to block on
> the encryption, so it would be nice if I could do that asynchronously and
> still be notified of its completion through the same interface.  I know I
> can do all this directly in windows (which is the only system api i'm
> intimately familiar with) via IOCP, so I'm hoping something similar can be
> achieved with Boost.Asio.
>
> Thanks
>
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