* BEWARE: one might think that checking the modes is useless, because
* if the pointers are identical, they refer to the same object.
* This is only true in strong typed languages, not in C were the following
* BEWARE: one might think that checking the modes is useless, because
* if the pointers are identical, they refer to the same object.
* This is only true in strong typed languages, not in C were the following