Re: [ctypes-users] Calling function pointers returned in structures

[Thomas H. <th...@py...>]

li...@68... writes:

> On Mon, 24 Feb 2003, Thomas Heller wrote:
> 
> > Currently you have to use 'i' to get the function pointers (addresses).
> > The you can 'from _ctypes import call_function' and call
> > call_function(address, argtuple).
> >
> 
> Thanks.  Is there a secret to passing arguments to a function this way?
> It seems to be working when there are no arguments, but when there are
> arguments it seems to run the function but then this exception occurs
> before a result can be returned:
> 
> ValueError: Procedure probably called with too many arguments (4 bytes in
> excess)

The problem is that call_function always uses the STDCALL calling
convention, and there's no way to teach it to use CDECL instead.  As a
temporary workaround, I've also implemented a 'call_cdeclfunction' in
_ctypes.pyd which should work for you (it's in a CVS snapshot binary
version I just uploaded to SF, in the files section:
ctypes-0.4.1.win32-py2.2.exe.

HTH,

Thomas