On Tue, Jan 26, 2010 at 4:51 PM, Sean McBride <[email protected]>wrote:
> On 1/25/10 4:49 PM, Robert Clair said:
>
> >The garbage collection docs section on the interior pointer issue shows
> >this example:
> >
> >NSData *myData = [someObject getMyData];
> >[myData retain];
> >const uint8_t *bytes = [myData bytes];
> >NSUInteger offset = 0, length = [myData length];
> >
> >while (offset < length) {
> > // bytes remains valid until next message sent to myData
> >}
> >[myData release];
>
> My favourite solution is this one:
> <http://lists.apple.com/archives/Objc-language/2009/Mar/msg00060.html>
>
> It's been working well for me.
I've gone the 'volatile' route:
NSData * volatile myData = [someObject getMyData];
// [myData retain]; Removed, no need w/ volatile.
const uint8_t *bytes = [myData bytes];
NSUInteger offset = 0, length = [myData length];
while (offset < length) {
// bytes remains valid until next message sent to myData
}
// [myData release]; Removed, no need w/ volatile.
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