-#define GET_FREE_POINTER() dynamic_space_free_pointer
-#define SET_FREE_POINTER(new_value) \
- (dynamic_space_free_pointer = (new_value))
-#define GET_GC_TRIGGER() current_auto_gc_trigger
-#define SET_GC_TRIGGER(new_value) \
- clear_auto_gc_trigger(); set_auto_gc_trigger(new_value);