interval_tree.h

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#ifndef _LINUX_INTERVAL_TREE_H
#define _LINUX_INTERVAL_TREE_H

#include <linux/rbtree.h>

struct interval_tree_node {
    struct rb_node rb;
    unsigned long start;    /* Start of interval */
    unsigned long last; /* Last location _in_ interval */
    unsigned long __subtree_last;
};

extern void
interval_tree_insert(struct interval_tree_node *node, struct rb_root *root);

extern void
interval_tree_remove(struct interval_tree_node *node, struct rb_root *root);

extern struct interval_tree_node *
interval_tree_iter_first(struct rb_root *root,
             unsigned long start, unsigned long last);

extern struct interval_tree_node *
interval_tree_iter_next(struct interval_tree_node *node,
            unsigned long start, unsigned long last);

#endif  /* _LINUX_INTERVAL_TREE_H */