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Re: Is there (semi-) portable IO-Completion-Port-like functionality in C++ land?

From Nobody <nobody@nowhere.com>
Subject Re: Is there (semi-) portable IO-Completion-Port-like functionality in C++ land?
Date 2012-04-22 03:17 +0100
Message-Id <pan.2012.04.22.02.17.22.556000@nowhere.com>
Newsgroups comp.lang.c++
References <9cfd1d2a-8b1e-47b3-84b0-7de22dadcdcc@b14g2000vbz.googlegroups.com> <jmq4au$21h$1@dont-email.me> <62c8871a-a172-46c2-9722-daf155849fdb@c28g2000vbu.googlegroups.com> <jmsp40$la$1@dont-email.me> <62de796b-165b-4bff-baef-2158c9df0e4d@i18g2000vbx.googlegroups.com>
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On Fri, 20 Apr 2012 19:53:17 -0700, K. Frank wrote:

> Why doesn't linux offer the equivalent of IO Completion Ports?

The pthreads API doesn't include thread pools, which would be a
prerequisite.

There are a number of third-party thread pool libraries. Once you have
that, I would have thought that implementing completion ports would be
straightforward enough.

OTOH, async I/O is often unnecessary if you're using threads (likewise for
non-blocking I/O or select/poll). You can normally just use blocking I/O
and threads, which has the advantage of working with files (accessing
files never "blocks", even if there's a delay) as well as demand-paging of
the process' code and data.

On Linux, the POSIX aio API is implemented by glibc in user-space using
threads.

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Thread

Is there (semi-) portable IO-Completion-Port-like functionality in C++ land? "K. Frank" <kfrank29.c@gmail.com> - 2012-04-18 16:46 -0700
  Re: Is there (semi-) portable IO-Completion-Port-like functionality in C++ land? Christopher Pisz <someone@somewhere.net> - 2012-04-19 17:41 -0500
    Re: Is there (semi-) portable IO-Completion-Port-like functionality in C++ land? "K. Frank" <kfrank29.c@gmail.com> - 2012-04-20 10:43 -0700
      Re: Is there (semi-) portable IO-Completion-Port-like functionality in C++ land? Christopher Pisz <someone@somewhere.net> - 2012-04-20 17:48 -0500
        Re: Is there (semi-) portable IO-Completion-Port-like functionality in C++ land? "K. Frank" <kfrank29.c@gmail.com> - 2012-04-20 19:53 -0700
          Re: Is there (semi-) portable IO-Completion-Port-like functionality in C++ land? Nobody <nobody@nowhere.com> - 2012-04-22 03:17 +0100
          Re: Is there (semi-) portable IO-Completion-Port-like functionality in C++ land? Christof Meerwald <NOSPAM-seeMySig+uzk5+@usenet.cmeerw.org> - 2012-04-22 20:09 +0000

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