You could even eliminate the (admittedly negligible) cost of setting keepAlive = nil by changing the if(keepAlive) to if(!keepAlive).
Along the lines of avoiding a message send, I wonder if this would work: do { // ... } while (!self); --Andy > On Jul 18, 2014, at 9:41 AM, Gerd Knops <gerti-cocoa...@bitart.com> wrote: > > That's similar to what I have used. Initially it started out simply as > > id keepAlive=self; > ... > keepAlive=nil; > > but a few Xcode versions ago the static analyzer started complaining that it > wasn't really doing anything. So that last line became > > if(keepAlive) { keepAlive=nil; } > > which shut up the analyzer. [keepAlive self]; like Andy suggests would > probably work just as well, though probably a tad more expensive as a method > call is involved. > > Gerd > >> On Jul 17, 2014, at 11:23 PM, Andy Lee <ag...@mac.com> wrote: >> >>> On Jul 17, 2014, at 11:01 PM, Jens Alfke <j...@mooseyard.com> wrote: >>> Once I’ve identified such a bug, the fix is easy: put a [[self retain] >>> autorelease] at the top of the method. Except now I’m using ARC, and I >>> can’t find a simple way of doing it. I tried adding >>> __unused id retainedSelf = self; >>> but the optimizer recognizes that retainedSelf isn’t used and strips it >>> out, making this a no-op. The only thing I’ve found that works is >>> CFRetain((__bridge CFTypeRef)self); >>> at the top of the method, and a corresponding CFRelease at the end, but >>> this is pretty ugly and could cause leaks if the method returns early. >> >> How about >> >> id retainedSelf = self; >> >> at the beginning and >> >> [retainedSelf self]; >> >> at the end? >> >> --Andy >> >> >> _______________________________________________ >> >> 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/gerti-cocoadev%40bitart.com >> >> This email sent to gerti-cocoa...@bitart.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