Re: Auto-initialize threads in STA or MTA?

From:
"Igor Tandetnik" <itandetnik@mvps.org>
Newsgroups:
microsoft.public.vc.atl
Date:
Sat, 8 Dec 2007 09:36:42 -0500
Message-ID:
<#$CKBfaOIHA.4808@TK2MSFTNGP05.phx.gbl>
"Boris" <boris@gtemail.net> wrote in message
news:op.t20sdnsk45fww6@burk.mshome.net

Is there a way to indicate that a new thread spawned should be put
automatically in STA or MTA (without calling CoInitialize)?


No.

The
reason I ask is that my COM library is based on a native C++ library
which is allowed to create native threads. If a method in a COM
object is invoked by a class in the C++ library I don't know if the
thread has already initialized COM.


How does that happen? Does the C++ library pass COM pointers between
threads without proper marshalling? That's a violation right there.

If you are saying the library calls a native method on your C++ class
which also just happens to implement a COM object, then it's your
responsibility to transfer the call to a thread that has properly
initialized COM if you want to do any COM-related work. E.g. for STA
threads, a common technique is to create a hidden window in the STA
thread and post yourself a window message from the worker thread.
--
With best wishes,
    Igor Tandetnik

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