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[Python-ideas] An alternate approach to async IO

Antoine Pitrou solipsis at pitrou.net
Wed Nov 28 08:02:58 CET 2012 
On Tue, 27 Nov 2012 19:15:14 -0500
Trent Nelson <trent at snakebite.org> wrote:

> On Tue, Nov 27, 2012 at 03:50:34PM -0800, Guido van Rossum wrote:
> > On Tue, Nov 27, 2012 at 3:33 PM, Sturla Molden <sturla at molden.no> wrote:
> > >
> > > Den 27. nov. 2012 kl. 23:36 skrev Trent Nelson <trent at snakebite.org>:
> > >
> > >>
> > >>    Right, but with things like interlocked lists, you can make that
> > >>    CPython|background_IO synchronization barrier much more performant
> > >>    than relying on GIL acquisition.
> > >
> > > You always need the GIL to call back to Python.  You don't need it for anything else.
> > 
> > You also need it for any use of an object, even INCREF, unless you
> > know no other thread yet knows about it.
> 
>     Right, that's why I proposed using non-Python types as buffers
>     whilst in the background IO threads.

Trent, once again, please read about Py_buffer.

Thanks

Antoine.
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