2007-06-12 13:07:11 +00:00
|
|
|
/*
|
|
|
|
|
* Copyright (C) 2007 Oracle. All rights reserved.
|
|
|
|
|
*
|
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
|
* modify it under the terms of the GNU General Public
|
|
|
|
|
* License v2 as published by the Free Software Foundation.
|
|
|
|
|
*
|
|
|
|
|
* 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 021110-1307, USA.
|
|
|
|
|
*/
|
|
|
|
|
|
2007-02-02 14:18:22 +00:00
|
|
|
/*
|
|
|
|
|
* Copyright (C) 2001 Momchil Velikov
|
|
|
|
|
* Portions Copyright (C) 2001 Christoph Hellwig
|
|
|
|
|
*
|
|
|
|
|
* 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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
|
*/
|
|
|
|
|
#ifndef _LINUX_RADIX_TREE_H
|
|
|
|
|
#define _LINUX_RADIX_TREE_H
|
|
|
|
|
|
2007-06-12 15:39:09 +00:00
|
|
|
#include "kerncompat.h"
|
|
|
|
|
|
2007-02-02 14:18:22 +00:00
|
|
|
#define RADIX_TREE_MAX_TAGS 2
|
|
|
|
|
|
|
|
|
|
/* root tags are stored in gfp_mask, shifted by __GFP_BITS_SHIFT */
|
|
|
|
|
struct radix_tree_root {
|
|
|
|
|
unsigned int height;
|
|
|
|
|
gfp_t gfp_mask;
|
|
|
|
|
struct radix_tree_node *rnode;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
#define RADIX_TREE_INIT(mask) { \
|
|
|
|
|
.height = 0, \
|
|
|
|
|
.gfp_mask = (mask), \
|
|
|
|
|
.rnode = NULL, \
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#define RADIX_TREE(name, mask) \
|
|
|
|
|
struct radix_tree_root name = RADIX_TREE_INIT(mask)
|
|
|
|
|
|
|
|
|
|
#define INIT_RADIX_TREE(root, mask) \
|
|
|
|
|
do { \
|
|
|
|
|
(root)->height = 0; \
|
|
|
|
|
(root)->gfp_mask = (mask); \
|
|
|
|
|
(root)->rnode = NULL; \
|
|
|
|
|
} while (0)
|
|
|
|
|
|
|
|
|
|
int radix_tree_insert(struct radix_tree_root *, unsigned long, void *);
|
|
|
|
|
void *radix_tree_lookup(struct radix_tree_root *, unsigned long);
|
|
|
|
|
void **radix_tree_lookup_slot(struct radix_tree_root *, unsigned long);
|
|
|
|
|
void *radix_tree_delete(struct radix_tree_root *, unsigned long);
|
|
|
|
|
unsigned int
|
|
|
|
|
radix_tree_gang_lookup(struct radix_tree_root *root, void **results,
|
|
|
|
|
unsigned long first_index, unsigned int max_items);
|
|
|
|
|
int radix_tree_preload(gfp_t gfp_mask);
|
|
|
|
|
void radix_tree_init(void);
|
|
|
|
|
void *radix_tree_tag_set(struct radix_tree_root *root,
|
|
|
|
|
unsigned long index, unsigned int tag);
|
|
|
|
|
void *radix_tree_tag_clear(struct radix_tree_root *root,
|
|
|
|
|
unsigned long index, unsigned int tag);
|
|
|
|
|
int radix_tree_tag_get(struct radix_tree_root *root,
|
|
|
|
|
unsigned long index, unsigned int tag);
|
|
|
|
|
unsigned int
|
|
|
|
|
radix_tree_gang_lookup_tag(struct radix_tree_root *root, void **results,
|
|
|
|
|
unsigned long first_index, unsigned int max_items,
|
|
|
|
|
unsigned int tag);
|
|
|
|
|
int radix_tree_tagged(struct radix_tree_root *root, unsigned int tag);
|
|
|
|
|
|
|
|
|
|
static inline void radix_tree_preload_end(void)
|
|
|
|
|
{
|
|
|
|
|
preempt_enable();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#endif /* _LINUX_RADIX_TREE_H */
|
