From: NiGHTS <nights@unku.us>
Subject: Re: Timeouts in Ada
Date: Thu, 17 Jul 2014 10:10:10 -0700 (PDT)
Date: 2014-07-17T10:10:10-07:00 [thread overview]
Message-ID: <601d8879-8f06-41b4-ab29-57c2b944cd44@googlegroups.com> (raw)
In-Reply-To: <1uas8lp70tji4.1jnnhryhd49tu$.dlg@40tude.net>
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. The logic behind this is that the blocking function is best used in a dedicated query thread whereas non-blocking is typically used in a single-threaded model where the main process checks up on the state of the query object while it takes care of other things, perhaps updating a progress bar or some other task.
I tend to prefer non-blocking processes like this so I can set my own blocking priority (for instance usleep(250000)). I feel its more portable and manageable to control the block myself.
Thank you for your answers. They have been very insightful.
next prev parent reply other threads:[~2014-07-17 17:10 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-17 5:18 Timeouts in Ada NiGHTS
2014-07-17 7:08 ` Simon Wright
2014-07-17 8:35 ` NiGHTS
2014-07-21 23:34 ` Randy Brukardt
2014-07-22 1:11 ` Shark8
2014-07-22 7:39 ` J-P. Rosen
2014-07-22 8:31 ` Simon Wright
2014-07-22 21:52 ` Randy Brukardt
2014-07-17 7:38 ` J-P. Rosen
2014-07-17 8:40 ` NiGHTS
2014-07-17 10:00 ` J-P. Rosen
2014-07-17 19:27 ` Jeffrey Carter
2014-07-17 19:51 ` J-P. Rosen
2014-07-17 20:52 ` Jeffrey Carter
2014-07-17 20:29 ` Adam Beneschan
2014-07-17 20:52 ` J-P. Rosen
2014-07-21 23:44 ` Randy Brukardt
2014-07-17 20:43 ` Jeffrey Carter
2014-07-21 23:37 ` Randy Brukardt
2014-07-17 7:42 ` Dmitry A. Kazakov
2014-07-17 8:59 ` NiGHTS
2014-07-17 9:48 ` Dmitry A. Kazakov
2014-07-17 17:10 ` NiGHTS [this message]
2014-07-17 20:45 ` Dmitry A. Kazakov
2014-07-17 16:12 ` Adam Beneschan
2014-07-17 16:46 ` NiGHTS
2014-07-17 17:11 ` Simon Wright
2014-07-17 17:58 ` NiGHTS
2014-07-17 19:02 ` Jeffrey Carter
2014-07-17 18:58 ` Jeffrey Carter
2014-07-17 18:12 ` Adam Beneschan
2014-07-17 19:27 ` Jeffrey Carter
2014-07-17 18:56 ` Jeffrey Carter
2014-07-23 22:37 ` Robert A Duff
2014-07-24 9:23 ` AdaMagica
2014-07-24 15:37 ` Robert A Duff
2014-07-25 5:16 ` Randy Brukardt
2014-07-25 9:11 ` AdaMagica
2014-07-25 16:15 ` Brad Moore
2014-07-25 16:34 ` Dmitry A. Kazakov
2014-07-17 19:27 ` Jeffrey Carter
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