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From: Simon Wright <simon@pushface.org>
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Subject: Re: best practice: error handling
Date: Sat, 11 Jun 2011 17:12:23 +0100
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"Yannick Duchêne (Hibou57)" <yannick_duchene@yahoo.fr> writes:

> I would say : at least the “errno” strategy, is not concurrency
> friendly. if two threads of a same process commit errors, then you are
> in trouble (one may overwrite the “errno” value of the
> other). Exceptions would be cleaner for such a case (providing your
> “errno” is not owned by threads).

In VxWorks, errno is task-specific. (with GNAT, all Ada tasks are
VxWorks tasks, but there are VxWorks tasks which aren't Ada tasks).