'Get the current Cython line number. Returns 0 if there is no
correspondence between the C and Cython code.'

@default_selected_gdb_frame()
def get_cython_lineno(self, frame):

    cyfunc = self.get_cython_function(frame)
    return cyfunc.module.lineno_c2cy.get(self.get_c_lineno(frame), 0)
