unable to pass void pointer to a class member

[Johannes Wienke]

I am unable to pass a void pointer to a class member. Im using the following code:

cpdef registerLib(self, fileName):
    # lots of code removed
    cdef void* lib = dlopen(fileName, RTLD_NOW)
    libEntry = Library()

cpdef class Library:

 cdef __name
 cdef __instances
 cdef __instCount
 cdef void* handle

 def __init__(self):
  self.__instances = []
  self.__instCount = 0

This code reports th error:

Error converting Pyrex file to C:
------------------------------------------------------------
...
  libEntry = Library()
  libEntry.handle = lib
                      ^
------------------------------------------------------------

/home/languitar/BA-workspace/shIP/csrc/cloader.pyx:48:23: Cannot convert 'void *' to Python object

The same thing happens if I try to use a setter function and any other combination of cdef, cpdef and so on I tried.

[robertwb (robertwb)]

You must declare libEntry to be of type Library, i.e.

cdef Library libEntry = Library

[Johannes Wienke (languitar)]

Thanks for the hint, but that results in this error:

  cpdef Library libEntry = Library()
               ^
------------------------------------------------------------

/home/languitar/BA-workspace/shIP/csrc/cloader.pyx:47:16: Syntax error in C variable declaration

[Johannes Wienke (languitar)]

Oh, I meant cdef, not cpdef, error is the same.

[robertwb (robertwb)]

On Apr 14, 2008, at 9:38 AM, Johannes Wienke wrote:
> Oh, I meant cdef, not cpdef, error is the same.

This is probably because you define this function before you define
the cdef class Library.

- Robert

[Johannes Wienke (languitar)]

Thanks! Things you don't normally think of, when you're used to programming in Java. ;)