Re: [OT] Retain count riddle
Re: [OT] Retain count riddle
- Subject: Re: [OT] Retain count riddle
- From: Steve Stockman <email@hidden>
- Date: Tue, 30 Mar 2004 15:00:50 -0600
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
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