Trap memory overflow

I remember reading time ago that trapping memory overflow wasnt easy
in Perl.

Damn, now I have to allocate a lot of info in a 3dim structure:

my @AAA; # 1st index: image index; 2nd: x coord; 3rd: y coord
....
$AAA[$i][$x][$y]=....
....

and it surely overflows since at some time the AAA structure does not
contains my info anymore - after of course having run for some hours
without problems ...

can somebody tell me how to trap the overflow?

thanks for any help!

Alessandro

Re: Trap memory overflow

Quoth "alexxx.magni@gmail.com" :
> I remember reading time ago that trapping memory overflow wasnt easy
> in Perl.

No. If you must try, see $^M in perlvar, and take note of the fact that
you'll probably have to rebuild perl to use it.

> Damn, now I have to allocate a lot of info in a 3dim structure:
>
> my @AAA; # 1st index: image index; 2nd: x coord; 3rd: y coord
> ...
> $AAA[$i][$x][$y]=....
> ...
>
> and it surely overflows since at some time the AAA structure does not
> contains my info anymore - after of course having run for some hours
> without problems ...

That isn't memory exhaustion. Perl will exit with an untrappable error
when it runs out of memory, so you have some other problem.

Ben

Re: Trap memory overflow

alexxx.magni@gmail.com schreef:

> my @AAA; # 1st index: image index; 2nd: x coord; 3rd: y coord
> ...
> $AAA[$i][$x][$y]=....


Is "image index" a consecutive range, starting at 0?

What is on the ...., a filename maybe? Maybe including a rather lengthy
and static path part?

Why not store the [$x,$y] as tuples?

my @AAA;

$AAA[0] = {
xy => [$x, $y ],
fn => "123.gif",
};

--
Affijn, Ruud

"Gewoon is een tijger."

Re: Trap memory overflow

"alexxx.magni@gmail.com" wrote:
> I remember reading time ago that trapping memory overflow wasnt easy
> in Perl.
>
> Damn, now I have to allocate a lot of info in a 3dim structure:
>
> my @AAA; # 1st index: image index; 2nd: x coord; 3rd: y coord
> ...
> $AAA[$i][$x][$y]=....
> ...
>
> and it surely overflows since at some time the AAA structure does not
> contains my info anymore

Perl does not respond to OOM conditions by randomly deleting data.
Something else is going on.

Xho

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