Re: [Boost-users] [asio] multiple simultaneous async_read calls

Subject: Re: [Boost-users] [asio] multiple simultaneous async_read calls
From: Niall Douglas (s_sourceforge_at_[hidden])
Date: 2014-08-11 09:10:31

On 11 Aug 2014 at 8:56, Lee Clagett wrote:

> > I'd ask a simpler question: what use case is there for configuring
> > multiple concurrent async reads on the same stream?
> >
> > On *files*, yes this makes sense. But on sockets/pipes etc, the use
> > cases are not many (possibly with UDP yes, otherwise no).
> >
> If you want to queue up multiple reads at a time (data to different
> buffers), having the framework handle it (ASIO or OS) is easier than
> writing that portion yourself.

ASIO (and AFIO) already provides scatter-gather i/o to do just this. 
Both call the appropriate OS facilities where those are available. 
See 
http://www.boost.org/doc/libs/1_56_0/doc/html/boost_asio/overview/core
/buffers.html.

Niall

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