4.1.2 Creating foreign structure types

4.1.2.7 Foreign pointers in saved images

When you save a Lisp image on disk with the function disksave, the following foreign pointers are preserved:

foreign pointers returned by the functionforeign-variable-pointer
foreign pointers created by the functionmake-foreign-pointer when the:static keyword argument has a non-nil value

Values pointed to by such foreign pointers are not reinitialized when the saved image is restarted.

All other foreign pointers are set to zero in the saved image.

The Advanced User's Guide - 9 SEP 1996