Re: DispatchPtr not releasing

It's not easy to post code. I'll try to explain more in depth.

DispatchPtr instances are kind of "smart" instances, because somewhere deep
in the machinery of COM a Release gets sent when instances go out of scope.
This is easily verified with the following: create a COM class, and
implement a FinalRelease method just to track when it gets called.  So if
you have code like this:

instA = new A().

when the instA variable goes out of scope the FinalRelease method will get
called automatically (it's called by the Release() method).

My problem is that if I need to pass the A instance to another COM class,
the A never gets finalized.  This is also easy to verify with code like
this:

instA = new A().
instB = new B().
instB->invokeSomeMethodPassingTheOtherInstance(instA).

the finalization of the B instance will happen, but not the finalization of
the A instance.

This only happens through JAWIN.  It's as if an extra refCount was added to
the A instance, thus not releasing it.

Regards,

Normand

----- Original Message -----
From: "Morten Andersen" <[email protected]>
To: <[email protected]>
Sent: Thursday, September 01, 2005 11:55 AM
Subject: Re: [JAWIN] DispatchPtr not releasing


> Hi Norm,
>
> I am at least not sure I understand your problem 100%. So if possible,
> can you please post a couple of lines of code that shows your problem
>
> Best Regards, and sorry for not being so quick in answering.
> Morten
>
> Normand Mongeau wrote:
>> So nobody knows about this, or did I not formulate my question clearly
>> enough?
>>
>> Norm
>>
>> ----- Original Message -----
>> From: "Normand Mongeau" <[email protected]>
>> To: <[email protected]>
>> Sent: Monday, August 29, 2005 5:36 PM
>> Subject: [JAWIN] DispatchPtr not releasing
>>
>>
>>> Hi,
>>>
>>> I have a problem with subclasses of DispatchPtr, which do not get
>>> released
>>> when they are passed as arguments of method invocations.
>>>
>>> To determine this, I implemented a FinalRelease method in my subclass,
>>> and
>>> when I instantiate my subclass and do nothing special with it, the
>>> FinalRelease method of my COM object gets called.  But if I send the
>>> instance as an argument to another COM object (the method does nothing
>>> with the instance received), then the FinalRelease method of my COM
>>> never
>>> gets called.
>>>
>>> Does this ring a bell with anyone?
>>>
>>> Thanks,
>>>
>>> Norm
>>
>>