135     list->gc.gc_next = list;  in gc_list_init()
141     return (list->gc.gc_next == list);  in gc_list_is_empty()
150     node->gc.gc_next = list;
152     node->gc.gc_prev->gc.gc_next = node;
161     node->gc.gc_prev->gc.gc_next = node->gc.gc_next;  in gc_list_remove()
162     node->gc.gc_next->gc.gc_prev = node->gc.gc_prev;  in gc_list_remove()
163     node->gc.gc_next = NULL; /* object is not currently tracked */  in gc_list_remove()
175     PyGC_Head *current_next = node->gc.gc_next;  in gc_list_move()
177     current_prev->gc.gc_next = current_next;  in gc_list_move()
181     new_prev->gc.gc_next = list->gc.gc_prev = node;  in gc_list_move()
182     node->gc.gc_next = list;  in gc_list_move()
193         tail->gc.gc_next = from->gc.gc_next;  in gc_list_merge()
194         tail->gc.gc_next->gc.gc_prev = tail;  in gc_list_merge()
196         to->gc.gc_prev->gc.gc_next = to;  in gc_list_merge()
206     for (gc = list->gc.gc_next; gc != list; gc = gc->gc.gc_next) {  in gc_list_size()
219     for (gc = gc_list->gc.gc_next; gc != gc_list; gc = gc->gc.gc_next) {  in append_objects()
240     PyGC_Head *gc = containers->gc.gc_next;  in update_refs()
241     for (; gc != containers; gc = gc->gc.gc_next) {  in update_refs()
293     PyGC_Head *gc = containers->gc.gc_next;  in subtract_refs()
294     for (; gc != containers; gc=gc->gc.gc_next) {  in subtract_refs()
356     PyGC_Head *gc = young->gc.gc_next;  in move_unreachable()
386             next = gc->gc.gc_next;  in move_unreachable()
399             next = gc->gc.gc_next;  in move_unreachable()
411     PyGC_Head *next, *gc = head->gc.gc_next;  in untrack_dicts()
414         next = gc->gc.gc_next;  in untrack_dicts()
441     for (gc = unreachable->gc.gc_next; gc != unreachable; gc = next) {  in move_legacy_finalizers()
445         next = gc->gc.gc_next;  in move_legacy_finalizers()
475     PyGC_Head *gc = finalizers->gc.gc_next;  in move_legacy_finalizer_reachable()
476     for (; gc != finalizers; gc = gc->gc.gc_next) {  in move_legacy_finalizer_reachable()
516     for (gc = unreachable->gc.gc_next; gc != unreachable; gc = next) {  in handle_weakrefs()
521         next = gc->gc.gc_next;  in handle_weakrefs()
600         gc = wrcb_to_call.gc.gc_next;  in handle_weakrefs()
627         if (wrcb_to_call.gc.gc_next == gc) {  in handle_weakrefs()
655     PyGC_Head *gc = finalizers->gc.gc_next;  in handle_legacy_finalizers()
662     for (; gc != finalizers; gc = gc->gc.gc_next) {  in handle_legacy_finalizers()
695         PyGC_Head *gc = collectable->gc.gc_next;  in finalize_garbage()
717     for (gc = collectable->gc.gc_next; gc != collectable;  in check_garbage()
718          gc = gc->gc.gc_next) {  in check_garbage()
723     for (gc = collectable->gc.gc_next; gc != collectable;  in check_garbage()
724          gc = gc->gc.gc_next) {  in check_garbage()
736     for (gc = collectable->gc.gc_next; gc != collectable;  in revive_garbage()
737          gc = gc->gc.gc_next) {  in revive_garbage()
752         PyGC_Head *gc = collectable->gc.gc_next;  in delete_garbage()
765         if (collectable->gc.gc_next == gc) {  in delete_garbage()
893     for (gc = unreachable.gc.gc_next; gc != &unreachable;  in collect()
894                     gc = gc->gc.gc_next) {  in collect()
921     for (gc = finalizers.gc.gc_next;  in collect()
923          gc = gc->gc.gc_next) {  in collect()
1248     for (gc = list->gc.gc_next; gc != list; gc = gc->gc.gc_next) {  in gc_referrers_for()