What does the stack look like when you break on
auto_refcount_underflow_error? After you break, you can do "call
(void)CFShow(<number goes here>)" with the number printed out in the
log message. That should hopefully give you the type of the object,
which might help you determine where the issue is.
What do you mean when you say that only one object causes the problem?
If that means you know what object it is, then can you show the code
where you work with it?
-Ken
On Tue, Aug 12, 2008 at 8:46 PM, Oleg Krupnov <[EMAIL PROTECTED]> wrote:
> I have added a call to CFMakeCollectable each time after I create a CF
> object like this
>
> CFSomeTypeRef a = CFCreateSomeType();
> if (a != nil)
> {
> CFMakeCollectable(a);
> }
>
> But I keep getting this runtime message in the console:
> malloc: reference count underflow for 0x10773c0, break on
> auto_refcount_underflow_error to debug.
>
> All CF objects I create are local vars in scope of one single
> function, no instance or global vars. I create several CF objects,
> some of them are used as arguments for other functions. The error is
> issued only for one of the CF objects I create, the other work fine.
>
> What can be the problem?
>
> On Mon, Aug 11, 2008 at 3:25 PM, Antonio Nunes <[EMAIL PROTECTED]> wrote:
>> On 11 Aug 2008, at 13:14, Antonio Nunes wrote:
>>
>>>> Will it cause a memory leak if I treat the Quartz object in the same
>>>> way as I do to all my NSObject descendants, i.e. no retains and rely
>>>> only on garbage collection?
>>>
>>> You either take care of the object's life time manually as you would in a
>>> non-garbage collected environment, or you explicitly move it into the realm
>>> of the garbage collector. Lookup "CFMakeCollectable" and "NSMakeCollectable"
>>> in the docs.
>>
>> I should add: read the "Memory Management Semantics" in "Using Core
>> Foundation with Garbage Collection" in the "Garbage Collection Programming
>> Guide", which has a thorough explanation of how to handle CF objects under
>> GC.
>>
>> António
>>
>> ----------------------------------------------------
>> It isn't so important to do great things,
>> as to do what you do with great love.
>> ----------------------------------------------------
>>
>>
>>
>>
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