perf tools: Copy rbtree.h from the kernel

include/asm-generic/bitops/__fls.h

include/asm-generic/bitops/fls.h

include/linux/perf_event.h

include/linux/rbtree.h

include/linux/list.h

include/linux/hash.h

include/linux/stringify.h

/*

  Red Black Trees

  (C) 1999  Andrea Arcangeli <andrea@suse.de>

  This program is free software; you can redistribute it and/or modify

  it under the terms of the GNU General Public License as published by

  the Free Software Foundation; either version 2 of the License, or

  (at your option) any later version.

  This program is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License

  along with this program; if not, write to the Free Software

  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  linux/include/linux/rbtree.h

  To use rbtrees you'll have to implement your own insert and search cores.

  This will avoid us to use callbacks and to drop drammatically performances.

  I know it's not the cleaner way,  but in C (not in C++) to get

  performances and genericity...

  See Documentation/rbtree.txt for documentation and samples.

*/

#ifndef __TOOLS_LINUX_PERF_RBTREE_H

#define __TOOLS_LINUX_PERF_RBTREE_H

#include <stdbool.h>

#include "../../../../include/linux/rbtree.h"

#include <linux/kernel.h>

#include <linux/stddef.h>

struct rb_node {

	unsigned long  __rb_parent_color;

	struct rb_node *rb_right;

	struct rb_node *rb_left;

} __attribute__((aligned(sizeof(long))));

    /* The alignment might seem pointless, but allegedly CRIS needs it */

struct rb_root {

	struct rb_node *rb_node;

};

#define rb_parent(r)   ((struct rb_node *)((r)->__rb_parent_color & ~3))

#define RB_ROOT	(struct rb_root) { NULL, }

#define	rb_entry(ptr, type, member) container_of(ptr, type, member)

#define RB_EMPTY_ROOT(root)  ((root)->rb_node == NULL)

/* 'empty' nodes are nodes that are known not to be inserted in an rbtree */

#define RB_EMPTY_NODE(node)  \

	((node)->__rb_parent_color == (unsigned long)(node))

#define RB_CLEAR_NODE(node)  \

	((node)->__rb_parent_color = (unsigned long)(node))

extern void rb_insert_color(struct rb_node *, struct rb_root *);

extern void rb_erase(struct rb_node *, struct rb_root *);

/* Find logical next and previous nodes in a tree */

extern struct rb_node *rb_next(const struct rb_node *);

extern struct rb_node *rb_prev(const struct rb_node *);

extern struct rb_node *rb_first(const struct rb_root *);

extern struct rb_node *rb_last(const struct rb_root *);

/* Postorder iteration - always visit the parent after its children */

extern struct rb_node *rb_first_postorder(const struct rb_root *);

extern struct rb_node *rb_next_postorder(const struct rb_node *);

/* Fast replacement of a single node without remove/rebalance/add/rebalance */

extern void rb_replace_node(struct rb_node *victim, struct rb_node *new,

			    struct rb_root *root);

static inline void rb_link_node(struct rb_node *node, struct rb_node *parent,

				struct rb_node **rb_link)

{

	node->__rb_parent_color = (unsigned long)parent;

	node->rb_left = node->rb_right = NULL;

	*rb_link = node;

}

#define rb_entry_safe(ptr, type, member) \

	({ typeof(ptr) ____ptr = (ptr); \

	   ____ptr ? rb_entry(____ptr, type, member) : NULL; \

	})

/*

 * Handy for checking that we are not deleting an entry that is