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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Timeouts in Ada
Date: Thu, 17 Jul 2014 22:45:15 +0200
Organization: cbb software GmbH
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Date: 2014-07-17T22:45:15+02:00
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On Thu, 17 Jul 2014 10:10:10 -0700 (PDT), NiGHTS wrote:

> On Thursday, July 17, 2014 5:48:56 AM UTC-4, Dmitry A. Kazakov wrote:
>> 
>> The example is quite unrealistic. If the DB client supported asynchronous
>> requests, then it would be very unlikely polling. Any reasonably designed
>> client would use some waitable OS object instead, i.e. waiting will be
>> non-busy.
> 
> I've dealt with many database libraries which provide both blocking and
> non-blocking queries.

Non-blocking vs. blocking is not same as non-busy waiting vs. polling.
Usually if non-blocking I/O is supported then non-busy waiting is as well.
For example overlapped I/O provides many ways for non-busy waiting, an
event, GetOverlappedResult etc.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de