I forgot to update MzCOM for a new requirement (to support futures) on
embedding MzScheme into a Windows executable.
I'll try this myself, but if you get to it first, try adding
static __declspec(thread) void *tls_space;
to the MzCOM executable, and then put
scheme_register_tls_space(&tls_space, 0);
before the call to scheme_main_setup() in evalLoop().
At Sun, 23 May 2010 12:12:26 +1000, Paul Steckler wrote:
> Erich Neuwirth had written to me that MzCOM from the latest PLT
> release crashed for him, so I went off to investigate. I hadn't run
> MzCOM (or MysterX) in yonks (as they say here).
>
> I compiled MzCOM from sources using Visual Studio 2008, no issues
> there. I couldn't get MysterX (libmysterx)
> to compile, though. The thought was to load MzCOM into MysterX, but
> it looked like a tough slog to fix the
> compilation errors. So instead, I decided to write a little C++
> driver to load MzCOM.
>
> The driver compiled fine, but the Eval method in MzCOM just hung. I
> haven't yet looked into that.
>
> Next, I tried call the About method. Indeed, I saw the About box --
> but then MzCOM crashed.
>
> The crash is due to a write-to-NULL error around line 368 of salloc.c,
> in this block:
>
> # elif defined(IMPLEMENT_THREAD_LOCAL_VIA_WIN_TLS)
> *scheme_get_thread_local_variables_ptr() = vars;
>
> Here's the driver program:
>
> #include "stdafx.h"
> #include "mzcom.h"
>
> int _tmain(int argc, _TCHAR* argv[])
> {
> CLSID clsid;
> IMzObj *pIMzObj;
>
> CoInitialize(NULL);
>
> CLSIDFromProgID(L"MzCOM.MzObj.4.2.5.0",&clsid);
> CoCreateInstance(clsid,NULL,CLSCTX_SERVER,IID_IMzObj, (void
> **)&pIMzObj);
>
> pIMzObj->About();
>
> return 0;
> }
>
> It's a VS2008 project, and you need to add mzcom.h and mzcom_i.c from
> the mzcom directory in
> src/worksp.
>
> Any ideas?
>
> -- Paul
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