Re: Proper retain/release etiquette
Re: Proper retain/release etiquette
- Subject: Re: Proper retain/release etiquette
- From: Steve Bird <email@hidden>
- Date: Tue, 23 Jul 2002 11:32:19 -0400
On Tuesday, July 23, 2002, at 11:09 AM, Roarke Lynch wrote:
On Tuesday, July 23, 2002, at 03:42 AM, Ondra Cada wrote
Well, since it is a very very common bug, I would explicitly add that
the pattern
// *WRONG*
id foo=[[Xyz alloc] init];
// other code here
[foo release];
is bound to leak as soon as the "other code" happens to raise. Therefore,
the proper pattern is
// *RIGHT*
id foo=[[[Xyz alloc] init] autorelease]; // or just [Xyz xyz], if
available
// other code here
or, if you have very hard reasons not to autorelease, you need to use
NS_DURING/NS_HANDLER/NS_ENDHANDLER.
What would make this leak? I was under the impression that autorelease
was basically a delayed release call.
--- Read it again. The WRONG code has no autorelease. If the "other code"
raises an exception, the [foo release] won't execute. In the RIGHT code,
it won't matter, since it will be released soon anyway.
----------------------------------------------------------------
Steve Bird
Culverson Software - Elegant software that is a pleasure to use.
www.Culverson.com (toll free) 1-877-676-8175
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