Re: Triggering an NSTextStorage Bug
Re: Triggering an NSTextStorage Bug
- Subject: Re: Triggering an NSTextStorage Bug
- From: Seth Willits <email@hidden>
- Date: Thu, 21 Mar 2013 11:39:26 -0700
On Mar 21, 2013, at 8:35 AM, Timothy Wood wrote:
> On Mar 20, 2013, at 12:01 PM, Kyle Sluder <email@hidden> wrote:
>> The reason it's limited to 19 bits is because for speed purposes
>> NSParagraphStyle implements its own inline retain count rather than
>> relying on NSObject's external refcount table. Which is also why you
>> can't make ARC weak references to NSParagraphStyle instances. ;-)
>
> Yikes. Usually the inline bits are used for the *low order* bits of the retain count. That is, the full retain count is something like (internal_refs + (external_refs << internal_width).
Ahh. 19 seems like such an arbitrary number, but if it's _supposed_ to be extended then that'd make more sense.
I'll be filing a radar today.
Thanks everyone.
--
Seth Willits
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