If the property is set to "retain", then the line self.cycler = [[[….initWithGrid:self] autorelease]
will cause the setter to retain the passed in object, so after this line, _cycler will have a (heuristic) retain count of 2 (an alloc and a retain). After this, when the autorelease pool is drained, reducing the (heuristic) retain count by 1: you've still got a hold of it in the property. Then in dealloc, you release the object in dealloc to reduce the (heuristic) retain count to 0. To release the object, you can use [_cycler release]; or self.cycler = nil; or you may be able to not even bother if you won't create a cycle, I haven't done manual memory in a while, but I think retained properties are released at destruction automatically. Aaron > On May 6, 2015, at 2:30 PM, Michael David Crawford <mdcrawf...@gmail.com> > wrote: > > Am I correct that autoreleased objects are released after each round > of even processing? > > In this case my cycler needs to hang around for the life of the whole program. > > Thanks, > > Mike > Michael David Crawford, Consulting Software Engineer > mdcrawf...@gmail.com > http://www.warplife.com/mdc/ > > Available for Software Development in the Portland, Oregon Metropolitan > Area. > > > On Wed, May 6, 2015 at 2:25 PM, Aaron Montgomery > <eey...@monsterworks.com> wrote: >> Having cycler set to "assign" and then releasing it in dealloc doesn't feel >> right. Why not set cycler to "retain", add an autorelease in init then >> release _cycler in dealloc? >> >> Aaron >> >> >>> On May 6, 2015, at 1:57 PM, Michael David Crawford <mdcrawf...@gmail.com> >>> wrote: >>> >>> I've had problems in the past where I failed to understand the Cocoa >>> ownership conventions, I'm willing to grant that could be the case. >>> >>> I know for sure that the analyzer enforces the naming conventions, >>> that is, the exact same function names in C or C++ won't yield that >>> same warnings as "alloc", "new" or "copy" would in Objective-C. >>> >>> I'm reluctant to use ARC because in my honest opinion, ARC will get >>> the leaks and most out of the crashes out of skanky code. If you >>> don't use ARC, you get them out by fixing the skank: >>> >>> "Dave, why do you add twelve extra bytes to all of Spellswell's >>> allocations?" >>> >>> "That was so Spellswell would stop crashing." Facepalm. >>> >>> // LifeGrid.h >>> @property (assign, nonatomic) GridCycler *cycler; >>> >>> // Lifegrid.m - init >>> self.cycler = [[GridCycler alloc] initWithGrid: self]; // Potential >>> leak of an object >>> if ( nil == self.cycler ) goto cycler_failed; >>> >>> // dealloc >>> [self.cycler release]; >>> >>> Expanding the "potential leak" message yields: >>> >>> 1. assuming 'self' is not nil >>> >>> 2. method returns Objective-C object with +1 retain count >>> >>> 3. Object leaked: allocated object is not references later in this >>> execution path and has a retain count of +1. >>> >>> Isn't that what I want? I should be taking ownership of it with >>> "alloc/initWithGrid". >>> >>> (initWithGrid doesn't do a cyclic retain.) >>> >>> Thanks, >>> >>> Mike >>> >>> Michael David Crawford, Consulting Software Engineer >>> mdcrawf...@gmail.com >>> http://www.warplife.com/mdc/ >>> >>> Available for Software Development in the Portland, Oregon Metropolitan >>> Area. >>> _______________________________________________ >>> >>> 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: >>> https://lists.apple.com/mailman/options/cocoa-dev/eeyore%40monsterworks.com >>> >>> This email sent to eey...@monsterworks.com >> _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
