Hi, Lisandro Dalcin wrote: > cdef class Mat: # <- proxy class > cdef PetscMat # <- PETSc object, a pointer to a refcounted struct. > > I need to store arbitrary Python objects inside the PETSc object, I'm > actually storing a dictionary. This dictionary have to survive until > the PETSc object is deallocated, but that deallocation do not > necesarily occurs when the instance of my proxy class is deallocated, > because the PETSc object can still 'live' (that is, a referece being > owned) inside other PETSc objects.
Can't you work with singleton proxies? That's what we do in lxml. There's never more than one Python Element proxy for an XML node struct. We use a factory function to build a proxy for a struct and keep a back pointer from the struct to the class, so that we can reuse an already existing proxy. All the Python state is kept in attributes of the proxy object, and the struct can be freed when the proxy is garbage collected by Python. Stefan _______________________________________________ Cython-dev mailing list [email protected] http://codespeak.net/mailman/listinfo/cython-dev
