Re: Gestalt
Re: Gestalt
- Subject: Re: Gestalt
- From: AM <email@hidden>
- Date: Thu, 22 Sep 2011 10:37:40 -0400
On Sep 21, 2011, at 6:09 PM, Conrad Shultz wrote:
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> On 9/21/11 2:22 PM, Charles Srstka wrote:
>> Why not? I find it to be safer than checking for the existence of
>> a method, because you never know if that method might have actually
>> have existed before it went public, but in a less stable form or
>> with different behavior. If this is the case, then just checking
>> whether the method exists and calling it could produce who knows
>> what behavior on older systems.
>
> I have always been under the impression that Apple recommends weak
> linking and run-time checks. It's what's covered in the (aging) Tech
> Note 2064 for OS X and, IIRC, is what is discussed in, for example,
> the original iPad/iOS 3.2 release notes.
>
> What are some examples of breakage happening under this scenario? I'd
> like to be on the lookout myself if I indeed did put too much faith in
> the documentation.
One relevant case I encountered was a leak in CFFileDescriptor which occurred on 10.5 but was fixed in 10.6. Under 10.5 (when detected), I had to manually close a leaked file descriptor.
Cheers,
M_______________________________________________
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