Re: Setter Gettor method style

[Christian Edward Gruber]

----- Original Message -----
From: "Pascal Bourguignon" <pjb@informatimago.com>
> >
> >   - (void) setTitle: (NSString *)newTitle {
> > [title autorelease];
>
> Here, there  is not  advantage to wait  before releasing  title.  It's
> owned by the object, it can  be released directly. If anybody has been
> interested in title it will have  retained it long ago. Since title is
> overwritten immediately, it cannot  be retrieved after this statement,
> so you can as well use release.
>

Unfortunately untrue.  It is possible, and in a highly multi-processing box,
it is quite feasible that one thread will release the object, which will
release its title, before the calling object's can finish using title.  Even
if someone goes:

id blah = [[[foo title] retain] autorelease]; there's a race-condition setup
there.  It's not likely to fail, but it may fail.  If your code is
multithreaded, then option number 2 is preferable.

> >
> >   - (NSString *) title {
> > return [[title retain] autorelease];
>
> This is strictly equivalent to { return title; }
>

No, this is not true if you are in a truly multithreading environment.

regards,
Christian.