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From: "Warren W. Gay VE3WWG" <ve3wwg@home.com>
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Newsgroups: comp.lang.ada
Subject: Re: Ada The Best Language?
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Date: Thu, 26 Jul 2001 17:13:36 GMT
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Date: 2001-07-26T17:13:36+00:00
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Florian Weimer wrote:
> 
> "Warren W. Gay VE3WWG" <ve3wwg@home.com> writes:
> 
> >> OTOH, I havent seen a proper thick binding for select() and poll()
> >> (using protected objects, so that you can use Ada select to wait for
> >> events). With a thin binding, SUSv2 select() and Ada select do not mix
> >> at all.
> >
> > I think you'll find that poll(2) can be interfaced to from Ada without
> > much trouble.
> 
> If you call poll(), your task blocks.  This is not always desirable;
> for example, sometimes you want to respond to entry calls even if
> you're waiting on some file descriptor.

But that is the whole point of select(2)/poll(2). Ie to block (or timeout)
until something interesting happens. 

If OTOH if you use poll(2) in a context where it doesn't make sense, then the
shame is on you-- not the system call.

-- 
Warren W. Gay VE3WWG
http://members.home.net/ve3wwg