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/*-
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _LINUX_RBTREE_H_
#define _LINUX_RBTREE_H_
/* for printf */
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/tree.h>
struct rb_node {
RB_ENTRY(rb_node) __entry;
};
#define rb_left __entry.rbe_left
#define rb_right __entry.rbe_right
/*
* We provide a false structure that has the same bit pattern as tree.h
* presents so it matches the member names expected by linux.
*/
struct rb_root {
struct rb_node *rb_node;
};
struct rb_root_cached {
struct rb_node *rb_node;
};
/*
* In linux all of the comparisons are done by the caller.
*/
int panic_cmp(struct rb_node *one, struct rb_node *two);
RB_HEAD(linux_root, rb_node);
RB_PROTOTYPE(linux_root, rb_node, __entry, panic_cmp);
#define rb_parent(r) RB_PARENT(r, __entry)
#define rb_color(r) RB_COLOR(r, __entry)
#define rb_is_red(r) (rb_color(r) == RB_RED)
#define rb_is_black(r) (rb_color(r) == RB_BLACK)
#define rb_set_parent(r, p) rb_parent((r)) = (p)
#define rb_set_color(r, c) rb_color((r)) = (c)
#define rb_entry(ptr, type, member) container_of(ptr, type, member)
#define rb_entry_safe(ptr, type, member) \
(ptr ? rb_entry(ptr, type, member) : NULL)
#define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL)
#define RB_EMPTY_NODE(node) (rb_parent(node) == node)
#define RB_CLEAR_NODE(node) (rb_set_parent(node, node))
#define rb_insert_color(node, root) \
linux_root_RB_INSERT_COLOR((struct linux_root *)(root), (node))
#define rb_insert_color_cached(node, root, leftmost) \
linux_root_RB_INSERT_COLOR((struct linux_root *)(root), (node))
#define rb_erase(node, root) \
linux_root_RB_REMOVE((struct linux_root *)(root), (node))
#define rb_erase_cached(node, root) \
linux_root_RB_REMOVE((struct linux_root *)(root), (node))
#define rb_next(node) RB_NEXT(linux_root, NULL, (node))
#define rb_prev(node) RB_PREV(linux_root, NULL, (node))
#define rb_first(root) RB_MIN(linux_root, (struct linux_root *)(root))
#define rb_first_cached(root) RB_MIN(linux_root, (struct linux_root *)(root))
#define rb_last(root) RB_MAX(linux_root, (struct linux_root *)(root))
static inline struct rb_node *
__rb_deepest_left(struct rb_node *node)
{
struct rb_node *parent = NULL;
while (node) {
parent = node;
if (RB_LEFT(node, __entry))
node = RB_LEFT(node, __entry);
else
node = RB_RIGHT(node, __entry);
}
return parent;
}
static inline struct rb_node *
rb_next_postorder(const struct rb_node *node)
{
struct rb_node *parent = RB_PARENT(node, __entry);
/* left -> right, right -> root */
if (parent != NULL &&
(node == RB_LEFT(parent, __entry)) &&
(RB_RIGHT(parent, __entry)))
return __rb_deepest_left(RB_RIGHT(parent, __entry));
else
return parent;
}
#define rbtree_postorder_for_each_entry_safe(x, y, head, member) \
for ((x) = rb_entry_safe(__rb_deepest_left((head)->rb_node), \
__typeof(*x), member); \
((x) != NULL) && ((y) = \
rb_entry_safe(rb_next_postorder(&x->member), typeof(*x), member), 1); \
(x) = (y))
static inline void
rb_link_node(struct rb_node *node, struct rb_node *parent,
struct rb_node **rb_link)
{
rb_set_parent(node, parent);
rb_set_color(node, RB_RED);
node->__entry.rbe_left = node->__entry.rbe_right = NULL;
*rb_link = node;
}
static inline void
rb_replace_node(struct rb_node *victim, struct rb_node *new,
struct rb_root *root)
{
struct rb_node *p;
p = rb_parent(victim);
if (p) {
if (p->rb_left == victim)
p->rb_left = new;
else
p->rb_right = new;
} else
root->rb_node = new;
if (victim->rb_left)
rb_set_parent(victim->rb_left, new);
if (victim->rb_right)
rb_set_parent(victim->rb_right, new);
*new = *victim;
}
#undef RB_ROOT
#define RB_ROOT (struct rb_root) { NULL }
#define RB_ROOT_CACHED (struct rb_root_cached) { NULL }
struct interval_tree_node {
struct rb_node rb;
unsigned long start;
unsigned long last;
};
static inline struct interval_tree_node *
interval_tree_iter_first(struct rb_root *root,
unsigned long start, unsigned long last)
{
#ifdef DRMDEBUG
printf("%s: stub start: 0x%lx last: 0x%lx\n", __func__, start, last);
#endif
return NULL;
}
static inline void
interval_tree_insert(struct interval_tree_node *node, struct rb_root *root)
{
#ifdef DRMDEBUG
printf("%s: stub start: 0x%lx last: 0x%lx\n", __func__, node->start, node->last);
#endif
}
static inline void
interval_tree_remove(struct interval_tree_node *node, struct rb_root *root)
{
#ifdef DRMDEBUG
printf("%s: stub start: 0x%lx last: 0x%lx\n", __func__, node->start, node->last);
#endif
}
#endif /* _LINUX_RBTREE_H_ */
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