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Re: sending notifications in -dealloc

From: Helge Hess
Subject: Re: sending notifications in -dealloc
Date: Fri, 31 May 2002 17:21:02 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0rc3) Gecko/20020523

Richard Frith-Macdonald wrote:
Perhaps NSDecrementExtraRefCountWasZero() and NSIncrementExtraRefCount() should simply not operate once the extra ref count goes to (unsigned)-1 (with the former returning NO) ?

Hm, I'm unsure about that. I'll check MacOSX. Even though I don't remember that I have written this somewhere, I could imagine code which essentially does that:

- (void)dealloc {
  if ([self shouldCache]) {
    [MyCache addObject:self];
  [super dealloc];

That is, the reference count really is raised up again and the deallocation is canceled. I'm aware that this is very dangerous (especially with subclassing) ...

I'll check MacOSX ...


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