Hi, I was explaining refcounting and NSAutoreleasePool to someone, and I thought referencing GNUstep might be useful to explain the correct mental model of the behavior.
But I'm confused about -drain in the non-ARC implementation: https://github.com/gnustep/libs-base/blob/b8185fa6c13172436c070ab3bf60b3f12bce433b/Source/NSAutoreleasePool.m#L546 Won't equating drain and dealloc mean that pools will misbehave, and that after [pool drain], the incorrect pool will get populated (and later drained)? Am I correctly interpreting that this happens? If so, is it correct that this happens? NSAutoreleasePool * outerPool = [NSAutoreleasePool new]; [[NSObject new] autorelease]; // object 0 added to outerPool NSAutoreleasePool * innerPool = [NSAutoreleasePool new]; [[NSObject new] autorelease]; // object 1 added to innerPool [innerPool drain]; // object 1 released; outerPool is the closest pool [[NSObject new] autorelease]; // object 2 added to outerPool [innerPool release]; // object 2 released, object 0 released; new pool created as the closest pool [outerPool release]; // no objects released; new pool created as the closest pool Unless I am missing something, object 0 would be released early here?
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