From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: GNAT Modification_Time limitation
Date: Wed, 21 Nov 2018 09:23:05 +0100
Date: 2018-11-21T09:23:05+01:00 [thread overview]
Message-ID: <pt34l8$1jh$1@gioia.aioe.org> (raw)
In-Reply-To: pt25i5$886$1@franka.jacob-sparre.dk
On 2018-11-21 00:32, Randy Brukardt wrote:
> Also note that the system clock on Windows systems typically only changes
> every 0.01 sec (Dmitry says this can be changed, although I've never seen
> that done).
The API call is timeBeginPeriod
https://docs.microsoft.com/en-us/windows/desktop/api/timeapi/nf-timeapi-timebeginperiod
The time resolution could be set down to 1ms (and never call
timeEndPeriod as the page suggests (:-))
> Moral: Doing "Make" on a modern machine, especially if you want it to be
> portable, is a tricky job.
Yes, especially because the OS on the modern machine tends to deploy
worst possible time source available. I guess that some MS-DOS code
still does that job on your i9 ...
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2018-11-21 8:23 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-19 22:56 GNAT Modification_Time limitation Lionel Draghi
2018-11-20 0:47 ` Shark8
2018-11-20 1:33 ` Keith Thompson
2018-11-20 1:33 ` Keith Thompson
2018-11-20 23:32 ` Randy Brukardt
2018-11-21 8:23 ` Dmitry A. Kazakov [this message]
2018-11-20 8:08 ` briot.emmanuel
2018-11-20 11:57 ` Lionel Draghi
2018-11-21 7:40 ` briot.emmanuel
2018-11-21 11:16 ` briot.emmanuel
2018-11-21 19:13 ` Lionel Draghi
2018-11-21 19:02 ` Lionel Draghi
2018-11-21 19:48 ` Simon Wright
2018-11-21 22:14 ` Lionel Draghi
2018-11-20 23:53 ` Randy Brukardt
2018-11-21 7:31 ` briot.emmanuel
2018-11-21 14:38 ` Shark8
2018-11-21 17:32 ` Simon Wright
2018-11-21 17:43 ` briot.emmanuel
2018-11-21 23:34 ` Randy Brukardt
2018-11-22 8:15 ` briot.emmanuel
2018-11-26 23:45 ` Randy Brukardt
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