CTypes on a 64 bit machine truncates pointers to 32 bits?

[Ron Garret]

In article <48d34449$0$2363$9b622d9e at news.freenet.de>,
 "Martin v. Löwis" <martin at v.loewis.de> wrote:

> >>>> foolib = cdll.LoadLibrary('foo.so')
> >>>> foolib.foo(0xF00000000)
> > 0
> 
> Shouldn't you tell ctypes that the argument and the result
> of foo is a pointer?

Yeah... that's it.  Default return type is int, which I assumed would be 
64 bits on a 64 bit machine, but turns out it's 32.  Stupid.

rg