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/
usr/
src/
linux-headers-3.0.0-14/
include/
linux/
- drwxr-xr-x
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Viewing file: prio_tree.h (3.25 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
#ifndef _LINUX_PRIO_TREE_H #define _LINUX_PRIO_TREE_H
/* * K&R 2nd ed. A8.3 somewhat obliquely hints that initial sequences of struct * fields with identical types should end up at the same location. We'll use * this until we can scrap struct raw_prio_tree_node. * * Note: all this could be done more elegantly by using unnamed union/struct * fields. However, gcc 2.95.3 and apparently also gcc 3.0.4 don't support this * language extension. */
struct raw_prio_tree_node { struct prio_tree_node *left; struct prio_tree_node *right; struct prio_tree_node *parent; };
struct prio_tree_node { struct prio_tree_node *left; struct prio_tree_node *right; struct prio_tree_node *parent; unsigned long start; unsigned long last; /* last location _in_ interval */ };
struct prio_tree_root { struct prio_tree_node *prio_tree_node; unsigned short index_bits; unsigned short raw; /* * 0: nodes are of type struct prio_tree_node * 1: nodes are of type raw_prio_tree_node */ };
struct prio_tree_iter { struct prio_tree_node *cur; unsigned long mask; unsigned long value; int size_level;
struct prio_tree_root *root; pgoff_t r_index; pgoff_t h_index; };
static inline void prio_tree_iter_init(struct prio_tree_iter *iter, struct prio_tree_root *root, pgoff_t r_index, pgoff_t h_index) { iter->root = root; iter->r_index = r_index; iter->h_index = h_index; iter->cur = NULL; }
#define __INIT_PRIO_TREE_ROOT(ptr, _raw) \ do { \ (ptr)->prio_tree_node = NULL; \ (ptr)->index_bits = 1; \ (ptr)->raw = (_raw); \ } while (0)
#define INIT_PRIO_TREE_ROOT(ptr) __INIT_PRIO_TREE_ROOT(ptr, 0) #define INIT_RAW_PRIO_TREE_ROOT(ptr) __INIT_PRIO_TREE_ROOT(ptr, 1)
#define INIT_PRIO_TREE_NODE(ptr) \ do { \ (ptr)->left = (ptr)->right = (ptr)->parent = (ptr); \ } while (0)
#define INIT_PRIO_TREE_ITER(ptr) \ do { \ (ptr)->cur = NULL; \ (ptr)->mask = 0UL; \ (ptr)->value = 0UL; \ (ptr)->size_level = 0; \ } while (0)
#define prio_tree_entry(ptr, type, member) \ ((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
static inline int prio_tree_empty(const struct prio_tree_root *root) { return root->prio_tree_node == NULL; }
static inline int prio_tree_root(const struct prio_tree_node *node) { return node->parent == node; }
static inline int prio_tree_left_empty(const struct prio_tree_node *node) { return node->left == node; }
static inline int prio_tree_right_empty(const struct prio_tree_node *node) { return node->right == node; }
struct prio_tree_node *prio_tree_replace(struct prio_tree_root *root, struct prio_tree_node *old, struct prio_tree_node *node); struct prio_tree_node *prio_tree_insert(struct prio_tree_root *root, struct prio_tree_node *node); void prio_tree_remove(struct prio_tree_root *root, struct prio_tree_node *node); struct prio_tree_node *prio_tree_next(struct prio_tree_iter *iter);
#define raw_prio_tree_replace(root, old, node) \ prio_tree_replace(root, (struct prio_tree_node *) (old), \ (struct prio_tree_node *) (node)) #define raw_prio_tree_insert(root, node) \ prio_tree_insert(root, (struct prio_tree_node *) (node)) #define raw_prio_tree_remove(root, node) \ prio_tree_remove(root, (struct prio_tree_node *) (node))
#endif /* _LINUX_PRIO_TREE_H */
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