Re: OS_OBJECT_USE_OBJC_RETAIN_RELEASE and xpc_release()
Re: OS_OBJECT_USE_OBJC_RETAIN_RELEASE and xpc_release()
- Subject: Re: OS_OBJECT_USE_OBJC_RETAIN_RELEASE and xpc_release()
- From: Jean-Daniel Dupas <email@hidden>
- Date: Thu, 08 Nov 2012 17:59:29 +0100
Le 8 nov. 2012 à 14:54, Jerry Krinock <email@hidden> a écrit :
> Update on email delays: Greg, sorry it took so long to reply this; I was waiting to see if your email would arrive. Although I have definitely been foiled by delays of several hours on this list for many months, it appears that the even-longer delays I saw last week were due to IEEE mail servers in New Jersey being hit by Hurricane Sandy.
>
> * * *
>
> On 2012 Nov 03, at 16:28, Greg Parker <email@hidden> wrote:
>
>> If you build with the 10.8 SDK, and your deployment target is 10.8 or later, then dispatch objects and XPC objects become Objective-C objects. If you use ARC then they are ordinary ARC-managed objects and you do not retain and release them yourself.
>>
>> You can temporarily revert to the old behavior by defining OS_OBJECT_USE_OBJC=0.
>
> Yes, setting setting -DOS_OBJECT_USE_OBJC=0 in the Compiler Flags of the file calling xpc_release(), which is compiled with ARC, fixed the problem.
>
>> Going forward the solution is to remove your manual retain/release calls and let ARC do the work.
>
> Are you saying that if a file is compiled with ARC, I should delete calls to xpc_release()? Read on…
>
>> You might try re-running the ARC migrator on your ARC code and see if it catches them.
>
> The little project was written with ARC from the ground up. So I just ran Edit ▸ Convert to Objective-C ARC on it, and was told that "No source file changes are necessary". The call to xpc_release() was not noticed.
>
> So, neither the xpc_release() documentation, nor the ARC migrator indicate that I should remove the call to xpc_release(). Are they both missing the boat?
Assuming you are targeting 10.8, yes you should remove all xpc_retain/release and dispatch_retain/release calls.
-- Jean-Daniel
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