224     list->gc.gc_next = list;  in gc_list_init()
230     return (list->gc.gc_next == list);  in gc_list_is_empty()
239     node->gc.gc_next = list;
241     node->gc.gc_prev->gc.gc_next = node;
250     node->gc.gc_prev->gc.gc_next = node->gc.gc_next;  in gc_list_remove()
251     node->gc.gc_next->gc.gc_prev = node->gc.gc_prev;  in gc_list_remove()
252     node->gc.gc_next = NULL; /* object is not currently tracked */  in gc_list_remove()
264     PyGC_Head *current_next = node->gc.gc_next;  in gc_list_move()
266     current_prev->gc.gc_next = current_next;  in gc_list_move()
270     new_prev->gc.gc_next = list->gc.gc_prev = node;  in gc_list_move()
271     node->gc.gc_next = list;  in gc_list_move()
282         tail->gc.gc_next = from->gc.gc_next;  in gc_list_merge()
283         tail->gc.gc_next->gc.gc_prev = tail;  in gc_list_merge()
285         to->gc.gc_prev->gc.gc_next = to;  in gc_list_merge()
295     for (gc = list->gc.gc_next; gc != list; gc = gc->gc.gc_next) {  in gc_list_size()
308     for (gc = gc_list->gc.gc_next; gc != gc_list; gc = gc->gc.gc_next) {  in append_objects()
329     PyGC_Head *gc = containers->gc.gc_next;  in update_refs()
330     for (; gc != containers; gc = gc->gc.gc_next) {  in update_refs()
382     PyGC_Head *gc = containers->gc.gc_next;  in subtract_refs()
383     for (; gc != containers; gc=gc->gc.gc_next) {  in subtract_refs()
445     PyGC_Head *gc = young->gc.gc_next;  in move_unreachable()
475             next = gc->gc.gc_next;  in move_unreachable()
488             next = gc->gc.gc_next;  in move_unreachable()
522     PyGC_Head *next, *gc = head->gc.gc_next;  in untrack_dicts()
525         next = gc->gc.gc_next;  in untrack_dicts()
545     for (gc = unreachable->gc.gc_next; gc != unreachable; gc = next) {  in move_finalizers()
549         next = gc->gc.gc_next;  in move_finalizers()
579     PyGC_Head *gc = finalizers->gc.gc_next;  in move_finalizer_reachable()
580     for (; gc != finalizers; gc = gc->gc.gc_next) {  in move_finalizer_reachable()
620     for (gc = unreachable->gc.gc_next; gc != unreachable; gc = next) {  in handle_weakrefs()
625         next = gc->gc.gc_next;  in handle_weakrefs()
704         gc = wrcb_to_call.gc.gc_next;  in handle_weakrefs()
731         if (wrcb_to_call.gc.gc_next == gc) {  in handle_weakrefs()
780     PyGC_Head *gc = finalizers->gc.gc_next;  in handle_finalizers()
787     for (; gc != finalizers; gc = gc->gc.gc_next) {  in handle_finalizers()
810         PyGC_Head *gc = collectable->gc.gc_next;  in delete_garbage()
824         if (collectable->gc.gc_next == gc) {  in delete_garbage()
969     for (gc = unreachable.gc.gc_next; gc != &unreachable;  in collect()
970                     gc = gc->gc.gc_next) {  in collect()
988     for (gc = finalizers.gc.gc_next;  in collect()
990          gc = gc->gc.gc_next) {  in collect()
1233     for (gc = list->gc.gc_next; gc != list; gc = gc->gc.gc_next) {  in gc_referrers_for()