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Re: Is Apple's singleton sample code correct?
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Re: Is Apple's singleton sample code correct?


  • Subject: Re: Is Apple's singleton sample code correct?
  • From: Dirk Stegemann <email@hidden>
  • Date: Sun, 4 Dec 2005 04:06:01 +0200

Hi,

Am 04.12.2005 um 01:11 schrieb Dietmar Planitzer:
On Dec 3, 2005, at 1:19 AM, Shaun Wexler wrote:

On Dec 2, 2005, at 3:24 PM, Dietmar Planitzer wrote:

What is the sound and important technical reason for overriding the reference counting methods in the case of a singleton ?

To prevent it's accidental deallocation, when no other objects happen to be retaining it.
(...)

This is a general problem which applies to all kinds of objects, be they singletons or non-singeltons,
(...)

Following the argumentation of the advocators of the "Overwrite the - dealloc method to do nothing" approach, this problem doesn't apply to the singleton objects, because those are not supposed to be ever deallocated (until finally wiped out of memory automatically on application termination), and therefore *not* being part of Cocoa's memory management rules, which apply to all the other mortal objects.

Regards,
Dirk Stegemann



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  • Follow-Ups:
    • Re: Is Apple's singleton sample code correct?
      • From: Andreas Mayer <email@hidden>
References: 
 >RE: Is Apple's singleton sample code correct? (From: Jeff Laing <email@hidden>)
 >Re: Is Apple's singleton sample code correct? (From: mmalcolm crawford <email@hidden>)
 >Re: Is Apple's singleton sample code correct? (From: Dietmar Planitzer <email@hidden>)
 >Re: Is Apple's singleton sample code correct? (From: Shaun Wexler <email@hidden>)
 >Re: Is Apple's singleton sample code correct? (From: Dietmar Planitzer <email@hidden>)
 >Re: Is Apple's singleton sample code correct? (From: Shaun Wexler <email@hidden>)
 >Re: Is Apple's singleton sample code correct? (From: Dietmar Planitzer <email@hidden>)

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