Re: [OT] Retain count riddle

• Subject: Re: [OT] Retain count riddle
• From: Stefan Fisk <email@hidden>
• Date: Wed, 31 Mar 2004 12:30:08 +0200

On Mar 30, 2004, at 1:49 PM, Sailesh Agrawal wrote:

So I had this bug the other day that I thought would make an interesting
riddle.

The code looked like this:

#define SAFE_SET(old, new) [new retain]; [old release]; old = new;

Others have already pointed out the leak and the crash, but if you still want to use a macro, I would suggest redefining it as:

#define SAFE_SET(old,new) do { id _temp=[(new) retain]; [old release]; old=_temp; } while(0)

--
Steve Stockman
Architect, Norton Utilities for Macintosh
Symantec Corporation
_______________________________________________
cocoa-dev mailing list | email@hidden
Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/cocoa-dev
Do not post admin requests to the list. They will be ignored.

• Follow-Ups:
  • Re: [OT] Retain count riddle
    • From: Kay Roepke <email@hidden>
  • Re: [OT] Retain count riddle
    • From: Óscar Morales Vivó <email@hidden>

• Prev by Date: Re: Distributed Objects pitfalls and strategies
• Next by Date: Re: [OT] Retain count riddle
• Previous by thread: Re: [OT] Retain count riddle
• Next by thread: Re: [OT] Retain count riddle
• Index(es):
  • Date
  • Thread