Passing C++ pointer as argument into Cython function

Question

cdef extern from \"Foo.h\":
    cdef cppclass Bar:
        pass

cdef class PyClass:
    cdef Bar *bar

    def __cinit__(self, Bar *b)
        bar = b

Answer 1

For each cdef class create a global cdef function that acts as a constructor, CefResponse is a C++ object, PyResponse a python equivalent of a c++ object:

cdef object CreatePyResponse(CefRefPtr[CefResponse] cefResponse):

    pyResponse = PyResponse()
    pyResponse.cefResponse = cefResponse
    return pyResponse

cdef class PyResponse:

    cdef CefRefPtr[CefResponse] cefResponse

    def GetStatus(self):

        return ((self.cefResponse.get())).GetStatus()

So instead of resp = PyResponse(cppObject) call resp = CreatePyResponse(cppObject).

Example taken from CEF Python: https://code.google.com/p/cefpython/source/browse/cefpython/response.pyx?r=0250b65e046a