Re: Use of Mac OS X 10.5 / Leopards Garbage Collection Considered Harmful

FROM : Sean McBride
DATE : Wed Feb 06 21:47:48 2008

On 2/6/08 7:12 PM, Alastair Houghton said:

>Furthermore I *think* (and this is from memory, based on some work I 
>did on GCC several years ago, so I might be wrong) that if you write 
>something like
>
>  void * __strong MyFunction(void);
>
>you'll find that the __strong attribute is attached to the *function* 
>rather than to the type.  In any case it's going to be ignored because 
>__strong only really affects variables, not types or functions.


Well, NSAllocateCollectable is declared like so in NSZone.h:

FOUNDATION_EXPORT void *__strong NSAllocateCollectable(NSUInteger size,
NSUInteger options) AVAILABLE_MAC_OS_X_VERSION_10_4_AND_LATER;

And the comment just above says "the pointer type of the stored location
must be marked with the __strong attribute in order for the write-
barrier assignment primitive to be generated".

--
____________________________________________________________
Sean McBride, B. Eng                <email_removed>
Rogue Research                        www.rogue-research.com
Mac Software Developer              Montréal, Québec, Canada