Re: [Quantlib-dev] Error after calling quantlib-c++-dll viaswig-c#-interface

[Frank H. <fho...@gm...>]

Hi Luigi,
the solution was quite easy, since the c++-dlls are native ones, and the
call into any one such is by DllImport within the SWIG wrapper, you do not
have to include them as a reference in a c#-project, which I did. The only
one thing one has to do is to place the dll where the c# code is able to
find it. Then it works properly, fast, and without any load/unload errors as
described below.

Regards
Frank

> -----Ursprüngliche Nachricht-----
> Von: Luigi Ballabio [mailto:lui...@gm...] 
> Gesendet: Freitag, 16. Mai 2008 17:30
> An: fho...@gm...
> Cc: qua...@li...
> Betreff: Re: [Quantlib-dev] Error after calling 
> quantlib-c++-dll viaswig-c#-interface
> 
> 
> On Mon, 2008-05-05 at 21:09 +0200, Frank Hövermann wrote:
> > I think this is a matter of unproper garbage collection or 
> something 
> > similar but I need some guru advice: A properly coded function (in 
> > C++, some double* serve as input, and a .txt or .csv file is the 
> > output but the function call is like "void func_name(double *input, 
> > char *path)" so nothing is actually
> > returned) which does some calculations using some QuantLib 
> objects somehow
> > changes its behaviour under /clr compiler option. This I 
> need to be able to
> > use it via SWIG under C#. Calculations are done as supposed 
> to, but upon C#
> > program termination an "unknown software exception" (0xc0020001) at
> > 0x7c81eb33 pops up. I googled a bit and indications point 
> to a too quick
> > (unmanaged) object disposal where the program terminates 
> before the C++
> > object does. Does this sound familiar to one of you? Are 
> there any hints to
> > prevent this?
> 
> Hi Frank,
> 	unfortunately, I'm not an expert at all in managed 
> C++/C#---my only exposure to C# has been to compile the SWIG 
> wrappers before release to check that they work...  Did you 
> try asking on the SWIG mailing list? It doesn't seem a SWIG 
> problem (since all you're exporting is a function taking some 
> basic types---no class instances are passing through the 
> wrapping layer) but there might be people there with more expertise.
> 
> Luigi
> 
> 
> 
> -- 
> 
> Dealing with failure is easy: work hard to improve. Success is also 
> easy to handle: you've solved the wrong problem. Work hard to 
> improve. 
> -- Alan Perlis 
>