radix-tree.h
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上传日期:2009-04-28
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- /*
- * 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
- #include <linux/preempt.h>
- #include <linux/types.h>
- struct radix_tree_root {
- unsigned int height;
- unsigned int 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_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, int tag);
- void *radix_tree_tag_clear(struct radix_tree_root *root,
- unsigned long index, int tag);
- int radix_tree_tag_get(struct radix_tree_root *root,
- unsigned long index, int tag);
- unsigned int
- radix_tree_gang_lookup_tag(struct radix_tree_root *root, void **results,
- unsigned long first_index, unsigned int max_items, int tag);
- int radix_tree_tagged(struct radix_tree_root *root, int tag);
- static inline void radix_tree_preload_end(void)
- {
- preempt_enable();
- }
- #endif /* _LINUX_RADIX_TREE_H */