winlinks
RB_PROTOTYPE(winlinks, winlink, entry, winlink_cmp);
struct winlink *winlink_find_by_index(struct winlinks *, int);
struct winlink *winlink_find_by_window(struct winlinks *, struct window *);
struct winlink *winlink_find_by_window_id(struct winlinks *, u_int);
u_int winlink_count(struct winlinks *);
struct winlink *winlink_add(struct winlinks *, int);
void winlink_remove(struct winlinks *, struct winlink *);