[Pyrex] How to deal with a void *

[Lenard Lindstrom]

If the void pointer is wrapped in an extension type then functions 
dependent on it can be called from methods. This is very OO.

cdef class Resource:
    cdef void *r
    def __new__(self, ...):
        self.r = initResource(....)
    def doSomething(self, ....):
        doSomething(self.r, ....)
    ....

It can also automatically release the resource from a __dealloc__ 
method.

Lenard Lindstrom
<len-l at telus.net>

On 12 May 2006 at 14:58, Greg Ewing wrote:

> Tomasz Primke wrote:
> 
> > Have you tried:
> > 
> >    cdef void *foo
> >    cdef unsigned long int *bar
> > 
> >    foo = initResource()
> >    bar = <unsigned long int*> foo
> 
> I don't think that will help the OP, because it
> sounded like he wanted to be able to pass his
> void * through Python code.
> 
> The only two safe ways of doing that have already
> been suggested: wrap it in an extension type, or
> wrap it in a PyCObject.
>