Re: [Boost-users] COM and boost::intrusive_ptr

From: Ovanes Markarian (om_boost_at_[hidden])
Date: 2007-01-17 07:32:36

May be you should take a look at Loki Library http://loki-lib.sourceforge.net initiated by A.
Alexandrescu (Author of "Modern C++ Design"). There is a policy based smart pointer implementation
and a policy to handle COM pointers. I just came across it some few weeks ago.

With Kind Regards,

Ovanes Markarian

On Wed, January 17, 2007 13:08, Philipp Henkel wrote:
> Hi,
>
> On 1/8/07, Trent Nelson wrote:
>>
>> Philipp Henkel wrote:
>> > I would like to discuss some code I'm using to manage COM objects with
>> > intrusive_ptr.
>>
>> Out of interest, what's your motivation for using intrusive_ptr over the
>> smart pointer facilities (via #import of your COM DLL/EXE) provided by
>> Visual Studio?
>>
>
> Internally the CComPtr often casts its raw pointer to IUnknown. That's no
> problem as long as you are using the CComPtr with COM interface classes
> only. Unfortunately I need a smart pointer for my implementation classes,
> too. Casts to IUnknown are ambiguous if the class implements two or more COM
> interfaces (dreaded diamond inheritance hierarchy) and therefore I thought
> about using another smart pointer.
> Additionally I'm not big fan of COM and that's why I prefer a lightweight
> reference counting solution like intrusive_ptr
> to handle my COM stuff.
>
>
> You'd lose the benefits of
>> things like IntelliSense completion for COM types if you wrolled your
>> own wrapper, I would think.
>
>
> That's not a problem. I'm using another code completion tool for VS. :-)
>
> Best regards,
> Philipp
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