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 18:20:16 +0200
Date: 2004-05-26T18:20:16+02:00 [thread overview]
Message-ID: <1459490.rBJp702xU0@linux1.krischik.com> (raw)
In-Reply-To: mailman.3.1085560469.391.comp.lang.ada@ada-france.org
Duncan Sands wrote:
>> Does calloc know when it gets a new page and when is gets recycled page?
>
> This is not really a recycled page. In any case, the answer is probably
> "no".
I was thinking about pages recycled by free ().
>> 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;
>> }
>
> It's more efficient to not have to zero a page unless you write to it - in
> fact to not really have any physical pages at all until you write to them.
Remember: Not all memory for malloc and calloc come staid from the OS. Some
have been freed by free ();
With Regards
Martin
--
mailto://krischik@users.sourceforge.net
http://www.ada.krischik.com
next prev parent reply other threads:[~2004-05-26 16:20 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
2004-05-26 8:34 ` Duncan Sands
2004-05-26 16:20 ` Martin Krischik [this message]
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