--- /dev/null
+/* $OpenBSD: rb-linux.c,v 1.1 2024/09/01 00:22:59 aisha Exp $ */
+/*
+ * Copyright 2002 Niels Provos <provos@citi.umich.edu>
+ * 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, 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * 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.
+ */
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <err.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <linux/rbtree.h>
+#include <linux/container_of.h>
+
+struct keynode {
+ struct rb_node node;
+ int key;
+};
+
+struct rb_root root;
+
+struct keynode *
+rb_find(struct rb_root *head, struct keynode *elm)
+{
+ struct rb_node *tmp = head->rb_node;
+
+ while (tmp) {
+ struct keynode *n = container_of(tmp, struct keynode, node);
+ if (elm->key < n->key)
+ tmp = tmp->rb_left;
+ else if (elm->key > n->key)
+ tmp = tmp->rb_right;
+ else
+ return n;
+ }
+ return NULL;
+}
+
+struct keynode *
+rb_insert(struct rb_root *head, struct keynode *elm)
+{
+ struct rb_node **tmp;
+ struct rb_node *parent = NULL;
+ tmp = &(head->rb_node);
+
+ while (*tmp) {
+ struct keynode *n = container_of(*tmp, struct keynode, node);
+ parent = *tmp;
+ if (elm->key < n->key)
+ tmp = &((*tmp)->rb_left);
+ else if (elm->key > n->key)
+ tmp = &((*tmp)->rb_right);
+ else
+ return n;
+ }
+
+ rb_link_node(&elm->node, parent, tmp);
+ rb_insert_color(&elm->node, head);
+
+ return NULL;
+}
+
+#define TESTS 10
+#define ITER 150
+#define MIN 5
+#define MAX 5000
+
+int
+main(int argc, char **argv)
+{
+ struct keynode *tmp, *ins;
+ int i, t, max, min;
+ struct rb_node *rb_node;
+
+ root = RB_ROOT;
+
+ for (t = 0; t < 10; t++) {
+ for (i = 0; i < ITER; i++) {
+ tmp = malloc(sizeof(struct keynode));
+ if (tmp == NULL) err(1, "malloc");
+ do {
+ tmp->key = arc4random_uniform(MAX-MIN);
+ tmp->key += MIN;
+ } while (rb_find(&root, tmp) != NULL);
+ if (i == 0)
+ max = min = tmp->key;
+ else {
+ if (tmp->key > max)
+ max = tmp->key;
+ if (tmp->key < min)
+ min = tmp->key;
+ }
+ if (rb_insert(&root, tmp) != NULL)
+ errx(1, "rb_insert failed");
+ }
+
+ rb_node = rb_first(&root);
+ ins = container_of(rb_node, struct keynode, node);
+ if (ins->key != min)
+ errx(1, "min does not match");
+ tmp = ins;
+ rb_node = rb_last(&root);
+ ins = container_of(rb_node, struct keynode, node);
+ if (ins->key != max)
+ errx(1, "max does not match");
+
+ rb_erase(&tmp->node, &root);
+
+ for (i = 0; i < ITER - 1; i++) {
+ rb_node = rb_first(&root);
+ if (rb_node == NULL)
+ errx(1, "rb_first error");
+ tmp = container_of(rb_node, struct keynode, node);
+ rb_erase(&tmp->node, &root);
+ free(tmp);
+ }
+ }
+
+ exit(0);
+}
+
+#undef RB_ROOT
+#define RB_ROOT(head) (head)->rbh_root
+
+RB_GENERATE(linux_root, rb_node, __entry, panic_cmp);
+
+int
+panic_cmp(struct rb_node *a, struct rb_node *b)
+{
+ errx(1, "%s", __func__);
+}
projects / openbsd / commitdiff