Re: ATL com server can pass interface as parameters?

"Igor Tandetnik" <>
Thu, 19 Apr 2007 07:49:43 -0400
"Ceasar" <> wrote in message

OLE32.dll access violation causes by VC6 debugger with smart pointer

Declare interfaces with smart pointer and trace it with VC6 debugger
=> Access violation at the end of application.
CComPtr<IMy1> pMy1;
CComPtr<IMy2> pMy2;

My psychic powers tell me you have code similar to this:

int main() {
    CComPtr<IMy1> pMy1;
    CComPtr<IMy2> pMy2;


    pMy1 = ...;
    pMy2 = ...;
    // do something

    return 0;
    // crash here

Smart pointers go out of scope at the closing curly brace. At this
moment they call Release() on underlying raw pointer. But,
CoUninitialize has already been called - after that, any COM call is
illegal and is likely to lead to a crash. You must arrange for all
interface pointers to be released before CoUninitialize is called.
With best wishes,
    Igor Tandetnik

With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925

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