[Python.NET] Updates to callconvutil.cs for .NET 2.0

Brian Lloyd brian at zope.com
Tue Sep 20 21:04:20 CEST 2005

Hee hee - this is good news. I'm looking forward to getting 
rid of that horrible IL hack... ;)

Brian Lloyd        brian at zope.com
V.P. Engineering   540.361.1716              
Zope Corporation   http://www.zope.com 

> -----Original Message-----
> From: pythondotnet-bounces at python.org
> [mailto:pythondotnet-bounces at python.org]On Behalf Of Greg Chapman
> Sent: Monday, September 19, 2005 3:50 PM
> To: pythondotnet at python.org
> Subject: Re: [Python.NET] Updates to callconvutil.cs for .NET 2.0
> Michael Eddington wrote:
> > Anyone else out there started to mess with Python.NET on the 2.0
> > platform?  One of the first hurtles was the output from ildasm does
> > not always place the method name on the next line, causing
> > callconvutil to place the modopt in the wrong place.  I've added a
> > regex in to check for and split the method line if the function name
> > is found.
> Here's something I just discovered.  You can now (in .NET 2.0) apply
> the UnmanagedFunctionPointer attribute to delegate types to get them to
> work as cdecl.  For example:
> [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
> public delegate IntPtr UnaryFunc(IntPtr ob);
> >From what I can tell, that delegate type is compatible with any managed
> method with the right signature.  When called from unmanaged code, such
> delegates will use the cdecl convention (this must be done in some kind
> of thunk, since the method itself still uses the normal .NET calling
> convention).
> Anyway, the upshot is it looks like you can apply that attribute to all
> the CallConvCDecl delegates in Interop.cs (removing the CallConvCDecl
> attribute, since it's not needed), and then not need callconvutil at
> all.
> -- 
> Greg Chapman
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