On Tue, Dec 1, 2009 at 1:47 PM, James Maxwell
<jbmaxw...@rubato-music.com> wrote:
> I'm trying to save the state of my app. It chews up a lot of memory, most of
> which is in large float* matrices. I'm getting an EXC_BAD_ACCESS error in
> -encodeBytes:length:forKey: and I'm just wondering what might be happening.
> The float* "coincidences" is a malloced array.
>
> NSUInteger coincsSize = maxCoincs * inputSize * sizeof(float);
This looks suspicious to me. Based on the variable names, it looks
like you malloc(maxCoincs * sizeof(float)), then store the actual
number of floats in the buffer in inputSize. If that's what you're
doing, you only need to multiply by maxCoincs (to get the size of the
whole buffer) or by inputSize (to find out how much of the buffer is
actually in use) - not by both of them.
> NSData* coincData = [NSData dataWithBytesNoCopy:&coincidences
> length:coincsSize];
> [aCoder encodeBytes:[coincData bytes] length:coincsSize
> forKey:@"coincidences"];
As someone else said, if you created the buffer with "coincidences =
malloc(...)", then you don't need to dereference it here; doing so
will give you the address of the pointer variable, not the address of
the buffer to which it points.
What's the point of creating the NSData object here? Wouldn't this be
just as good?
[aCoder encodeBytes:coincidences length:coincsSize forKey:@"coincidences"];
sherm--
--
Cocoa programming in Perl:
http://www.camelbones.org
_______________________________________________
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to arch...@mail-archive.com
