From owner-freebsd-current  Tue Apr 13 16:53:52 1999
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Date: Tue, 13 Apr 1999 19:50:54 -0400 (EDT)
From: Daniel Eischen <eischen@vigrid.com>
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To: eischen@vigrid.com, jdp@polstra.com
Subject: Re: cvsup
Cc: current@FreeBSD.ORG
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John Polstra wrote:
> > That statement made me think that Modula-3 had it's own threading
> > support because our native threads using non-blocking file I/O.
> 
> For disk I/O?  Are you sure?  If so then it must use the aio/lio calls
> or something similar.  Disk I/O calls _always_ block, even if you've
> set O_NONBLOCK on the file descriptor.

No it doesn't use aio/lio (although I was recently thinking about
trying it).  It uses select for I/O readiness, then read/write on
O_NONBLOCK files.

Dan Eischen
eischen@vigrid.com


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