-SCM_API SCM scm_guardian_greedy_p (SCM guardian);
-SCM_API SCM scm_guardian_destroyed_p (SCM guardian);
-
-/* these are to be called from C: */
-SCM_API SCM scm_guard (SCM guardian, SCM obj, int throw_p);
-SCM_API SCM scm_get_one_zombie (SCM guardian);
+SCM_API void scm_i_init_guardians_for_gc (void);
+SCM_API void scm_i_identify_inaccessible_guardeds (void);
+SCM_API int scm_i_mark_inaccessible_guardeds (void);