<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def pointer(self):
 """Get a ctypes void pointer to the memory mapped region. :type: ctypes.c_void_p """

        return ctypes.cast(ctypes.pointer(ctypes.c_uint8.from_buffer(self.mapping, 0)), ctypes.c_void_p)