[xmlvm-users] Memory management and returned objects

[Gergely K. <ger...@ma...>]

Hi,

I observed, the following pattern in the generated code (in pseudocode):

_op1.o = [ref methodCall];
[op1.o autorelease];

However, the Cocoa memory management guide says, that you only need to
release a reference, if you own it. It also says that you only own an
object, if it was created with init, new or copy, or you have called retain
on it.

This means that in general if you call a method, you do not own the returned
object, so you should not call autorelease on it.
Why does this XMLVM the other way around? Is it because of the separate
autoreleasepool for each method?
It could generate the return sequence like this, and still follow the
general rules of Cocoa memory management:

in the returning method:
[_op1.o retain];
[_pool release];
return [_op1.o autorelease];

in the caller do not call autorelease.

Am I missing something?

Best Regards,
Gergely

-- 
Kis Gergely
MattaKis Consulting
Email: ger...@ma...
Web: http://www.mattakis.com
Phone: +36 70 408 1723