Memory Leak Issue

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Bala - 24 Jul 2006 12:06 GMT

Hi all,

I am getting memory leak on the following statement.

CFHTTPMessageRef httpRequest=
CFHTTPMessageCreateRequest(kCFAllocatorDefault, CFSTR("GET"),
CFURLCreateWithString(kCFAllocatorDefault,
CFStringCreateWithCString(kCFAllocatorDefault, requestString,
kCFStringEncodingUTF8), NULL), kCFHTTPVersion1_1);

requestString - is the complete request string its a CString
In this statement im only releasing requestString.

Can somebody tell me what are the thning I have to deallocate to solve
the memory leak.
other than requestString I hav not allocated any other stirng so do I
really need to dealloce any of the strings.

Thanks,
Bala

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Gregory Weston - 24 Jul 2006 12:54 GMT

> Hi all,
>
[quoted text clipped - 16 lines]
> Thanks,
> Bala

For the most part, any time you call a function that has "Create" in the
name you're going to have to call CFRelease somewhere down the line.
There are a couple of cases where a function that you'd pass such an
object to will consume it - take responsibility for one decrement of the
ref count - but those are very rare and documented. So I'd say that
you'll need to release httpRequest and the URL that you're passing as
the third argument to CFHTTPMessageCreateRequest.

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David Phillip Oster - 25 Jul 2006 15:50 GMT

> Hi all,
>
[quoted text clipped - 13 lines]
> other than requestString I hav not allocated any other stirng so do I
> really need to dealloce any of the strings.

Gregory is right. Should be:

CFStringRef s = CFStringCreateWithCString(kCFAllocatorDefault, requestString, kCFStringEncodingUTF8);

CFURLRef url = CFURLCreateWithString(kCFAllocatorDefault, s, NULL);
CFRelease(s);

CFHTTPMessageRef httpRequest=CFHTTPMessageCreateRequest(kCFAllocatorDefault, CFSTR("GET"),
url, kCFHTTPVersion1_1);
CFRelease(url);

...

CFRelease(httpRequest);

You can release objects immediately after you use them, since the object
that uses them will retain them while it is using them.

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Mac Forum / Programming / Mac Programming / July 2006

Memory Leak Issue