Yes, since you AddRef'ed it before returning it to the client, the reference
count will hit zero only when the client call Release.

// B

-----Original Message-----
From: Pete Davis [mailto:pdavisQUETEL.COM]
Sent: den 6 februari 2002 14:33
To: DCOMDISCUSS.MICROSOFT.COM
Subject: Re: Page Swapping

Actually, this is exactly what we do, but can we do a
pLocalRecordset->Release() without releasing **ppRecSet?

Pete
----- Original Message -----
From: "Jonas Blunck TACMa" <jobuTAC.SE>
To: <DCOMDISCUSS.MICROSOFT.COM>
Sent: Wednesday, February 06, 2002 8:26 AM
Subject: Re: Page Swapping

> What about doing this:
>
> HRESULT Amethod(Idispatch** ppRecSet)
> {
> *ppRecSet = pLocalRecordset; // ado recordset
> (*ppRecSet)->AddRef();
>
> return S_OK;
> }
>
> The recordset is AddRef'ed and can be released when the client is done
with
> it. This also confirms with the COM reference couting rules, which
> effectively state that out-parameters should be AddRef'ed.
>
> // B
>
>
> -----Original Message-----
> From: Pete Davis [mailto:pdavisQUETEL.COM]
> Sent: den 6 februari 2002 14:27
> To: DCOMDISCUSS.MICROSOFT.COM
> Subject: Re: Page Swapping
>
>
> Okay, it works something like this:
>
> HRESULT AMethod(/*[out]*/ IDispatch **ppRecSet)
> {
> ...
> Get an ADO recordset
> ...
>
> *ppRecSet = (IDispatch*) pLocalRecordset;
>
> return S_OK
> }
>
> Okay, at the time when we execute return S_OK, the pLocalRecordset
> needs
to
> have a reference count of 1, otherwise the client will receive an
> invalid recordset.
>
> So, there's no way, at ths point, to release pLocalRecordset. So
> instead, before calling return S_OK, we add pLocalRecordset to our
> garbage
collection
> list. The next time AMethod is called, the first thing we do is go
> through the list and release any recordsets that are more than 2
> minutes old.
>
> Does that make sense?
>
> Pete
>
> ----- Original Message -----
> From: "Jonas Blunck TACMa" <jobuTAC.SE>
> To: <DCOMDISCUSS.MICROSOFT.COM>
> Sent: Wednesday, February 06, 2002 8:09 AM
> Subject: Re: Page Swapping
>
> [snip]
> Had to delete the rest as the message got bounced for being too long.
>
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