Re: Proper Memory Management
Re: Proper Memory Management
- Subject: Re: Proper Memory Management
- From: Jack Carbaugh <email@hidden>
- Date: Tue, 19 Jan 2010 16:20:35 -0500
It is my understanding that, the array returned as "result" would be
auto released. Therefore, you would want to retain it for your use,
then release it later.
On Jan 19, 2010, at 4:14 PM, Philip Vallone wrote:
Thanks.. Good question. The method in question
"PerformXMLXPathQuery" is a wrapper that was obtained:
http://cocoawithlove.com/2008/10/using-libxml2-for-parsing-and-xpath.html
NSArray *PerformXMLXPathQuery(NSData *document, NSString *query)
{
xmlDocPtr doc;
/* Load XML document */
doc = xmlReadMemory([document bytes], [document length], "",
NULL, XML_PARSE_RECOVER);
if (doc == NULL)
{
NSLog(@"Unable to parse.");
return nil;
}
NSArray *result = PerformXPathQuery(doc, query);
xmlFreeDoc(doc);
return result;
}
How can I tell who has ownership of the Array?
Thanks!
On Jan 19, 2010, at 3:56 PM, Dave Carrigan wrote:
On Jan 19, 2010, at 12:52 PM, Dave DeLong wrote:
None of them.
According to the memory management rules, you're only responsible
for objects you create via an "alloc", "new", or "copy" method,
which none of these are. All of these objects are autoreleased.
Unless PerformXMLXPathQuery returns an object that you own. But if
it does that, it should have been given a better name that has the
word alloc, new or copy in it.
--
Dave Carrigan
email@hidden
Seattle, WA, USA
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