[Quickfix-developers] .NET & COM threading models

[QuickFIX <or...@qu...>]

John,

If you are unable to resolve this with MSXML, QuickFIX also supports =20
libxml2, which is open source and also has a windows binary =20
distribution.  See the installation instructions for how to tell =20
QuickFIX to build against libxml in place of MSXML3:  =20
http://quickfix.sourceforge.net/quickfix/doc/html/=20
install.html#Windows%20(C++)

--oren

On Apr 13, 2004, at 4:36 PM, John Debay wrote:

> Hi,
>
> I'm trying to use QuickFix 1.7.0 within a server hosted on .NET =20
> Remoting.
> I'm running into some incompatibilities between the COM threading =
model
> Remoting sets up and QuickFix, which uses an STA model. Specifically, =20=

> within
> the function MSXML_DOMDocument::MSXML_DOMDocument(), the line:
>
> if(FAILED(CoInitialize(NULL)))
>     throw ConfigError("Could not initialize COM");
>
> throws an exception. The reason is that CoInitialize() "initializes =20=

> the COM
> library on the current thread and identifies the concurrency model as
> single-thread apartment (STA)," to quote the documentation. Before =20
> this code
> is run, the .NET runtime has already set the current thread to run =20
> within an
> MTA model.
>
> I believe I have a fix in place by replacing CoInitialize with
> CoInitializeEx and setting dwCoInit to COINIT_MULTITHREADED, but won't =
=20
> be
> sure until I have an opportunity to thoroughly test tomorrow. In the
> meantime I was hoping for a little guidance.
>
> Has anyone had any experience mixing COM threading models with =20
> QuickFix? Is
> there a different XML library I can use besides MSXML? What does the =20=

> *nix
> implementation use?
>
> Thanks in advance.
>
> John
>
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