From: Martin Krischik <krischik@users.sourceforge.net>
Subject: Re: Is the Ada run-time required to detect out-of-memory
Date: Wed, 26 May 2004 10:16:23 +0200
Date: 2004-05-26T10:16:23+02:00 [thread overview]
Message-ID: <2023994.aDeWvtcRlF@linux1.krischik.com> (raw)
In-Reply-To: mailman.2.1085557119.391.comp.lang.ada@ada-france.org
Duncan Sands wrote:
>> one could use calloc. calloc zeros memory and therefore touches every
>> page.
>
> Maybe not - perhaps the virtual memory mapping just points those pages at
> the zero page (a special physical page filled with zeros), with
> copy-on-write so you get assigned a real page only if you write to it
> (calloc won't need to write, because it knows the page starts "filled"
> with zeros).
Does calloc know when it gets a new page and when is gets recycled page?
After all the simplest calloc implementation would be:
void*
calloc(size_t nmemb, size_t size)
{
auto void* result = malloc (nmemb * size);
memset (result, '\0', nmemb * size);
return result;
}
With Regards
Martrin
--
mailto://krischik@users.sourceforge.net
http://www.ada.krischik.com
next prev parent reply other threads:[~2004-05-26 8:16 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-20 22:54 Is the Ada run-time required to detect out-of-memory conditions? Ludovic Brenta
2004-05-21 0:44 ` Georg Bauhaus
2004-05-21 0:47 ` Stephen Leake
2004-05-21 0:54 ` Georg Bauhaus
2004-05-21 1:00 ` Stephen Leake
2004-05-21 3:29 ` Robert I. Eachus
2004-05-21 8:04 ` Vinzent 'Gadget' Hoefler
2004-05-21 9:34 ` Martin Krischik
2004-05-21 11:13 ` Wojtek Narczynski
2004-05-21 12:55 ` Martin Krischik
2004-05-21 16:00 ` Robert I. Eachus
2004-05-21 17:13 ` Ludovic Brenta
2004-05-21 23:41 ` Wojtek Narczynski
2004-05-23 8:20 ` Martin Krischik
2004-05-21 19:58 ` Randy Brukardt
2004-05-21 16:56 ` Mark H Johnson
2004-05-21 17:19 ` Ludovic Brenta
2004-05-21 21:39 ` user
2004-05-21 22:04 ` Ludovic Brenta
2004-05-21 22:11 ` Ludovic Brenta
2004-05-22 11:40 ` Simon Wright
2004-05-25 20:43 ` Is the Ada run-time required to detect out-of-memory Robert I. Eachus
2004-05-25 20:58 ` Duncan Sands
2004-05-25 21:19 ` Ludovic Brenta
2004-05-25 21:31 ` Duncan Sands
2004-05-26 7:09 ` Martin Krischik
2004-05-26 7:38 ` Duncan Sands
2004-05-26 8:16 ` Martin Krischik [this message]
2004-05-26 8:34 ` Duncan Sands
2004-05-26 16:20 ` Martin Krischik
2004-05-22 13:40 ` Is the Ada run-time required to detect out-of-memory conditions? Duncan Sands
2004-05-22 14:09 ` Martin Krischik
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox