Re: ARC dealloc best pratice
Re: ARC dealloc best pratice
- Subject: Re: ARC dealloc best pratice
- From: Greg Parker <email@hidden>
- Date: Fri, 06 Feb 2015 13:35:34 -0800
> On Feb 6, 2015, at 1:18 PM, Jonathan Mitchell <email@hidden> wrote:
>
>> On 6 Feb 2015, at 20:46, Jens Alfke <email@hidden> wrote:
>>
>> Come to think of it, I'm surprised that AppKit delegates are still unsafe-unretained. Why haven't these been converted to safe weak references yet?
>
> I presume that AppKIt (all of it?) is not compiled using ARC and hence doesn’t get weak reference tracking et al?
The weak reference machinery is available to non-ARC code by calling the runtime functions directly. The system is fragile if you write it by hand, though, so we don't generally recommend it.
> Why isn AppKit compiled using ARC? Probably because it has a track record as it is and would likely gain nothing in a functional sense.
The primary reason is that there is no way to compile a single library that uses ARC and also supports GC. AppKit needs to support GC so it can't use ARC.
--
Greg Parker email@hidden Runtime Wrangler
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