server-skynet-source-3rd-je.../test/unit/rb.c

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#include "test/jemalloc_test.h"
#define rbtn_black_height(a_type, a_field, a_rbt, r_height) do { \
a_type *rbp_bh_t; \
for (rbp_bh_t = (a_rbt)->rbt_root, (r_height) = 0; \
rbp_bh_t != &(a_rbt)->rbt_nil; \
rbp_bh_t = rbtn_left_get(a_type, a_field, rbp_bh_t)) { \
if (!rbtn_red_get(a_type, a_field, rbp_bh_t)) { \
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(r_height)++; \
} \
} \
} while (0)
typedef struct node_s node_t;
struct node_s {
#define NODE_MAGIC 0x9823af7e
uint32_t magic;
rb_node(node_t) link;
uint64_t key;
};
static int
node_cmp(node_t *a, node_t *b) {
int ret;
assert_u32_eq(a->magic, NODE_MAGIC, "Bad magic");
assert_u32_eq(b->magic, NODE_MAGIC, "Bad magic");
ret = (a->key > b->key) - (a->key < b->key);
if (ret == 0) {
/*
* Duplicates are not allowed in the tree, so force an
* arbitrary ordering for non-identical items with equal keys.
*/
ret = (((uintptr_t)a) > ((uintptr_t)b))
- (((uintptr_t)a) < ((uintptr_t)b));
}
return (ret);
}
typedef rb_tree(node_t) tree_t;
rb_gen(static, tree_, tree_t, node_t, link, node_cmp);
TEST_BEGIN(test_rb_empty)
{
tree_t tree;
node_t key;
tree_new(&tree);
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assert_true(tree_empty(&tree), "Tree should be empty");
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assert_ptr_null(tree_first(&tree), "Unexpected node");
assert_ptr_null(tree_last(&tree), "Unexpected node");
key.key = 0;
key.magic = NODE_MAGIC;
assert_ptr_null(tree_search(&tree, &key), "Unexpected node");
key.key = 0;
key.magic = NODE_MAGIC;
assert_ptr_null(tree_nsearch(&tree, &key), "Unexpected node");
key.key = 0;
key.magic = NODE_MAGIC;
assert_ptr_null(tree_psearch(&tree, &key), "Unexpected node");
}
TEST_END
static unsigned
tree_recurse(node_t *node, unsigned black_height, unsigned black_depth,
node_t *nil)
{
unsigned ret = 0;
node_t *left_node = rbtn_left_get(node_t, link, node);
node_t *right_node = rbtn_right_get(node_t, link, node);
if (!rbtn_red_get(node_t, link, node))
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black_depth++;
/* Red nodes must be interleaved with black nodes. */
if (rbtn_red_get(node_t, link, node)) {
assert_false(rbtn_red_get(node_t, link, left_node),
"Node should be black");
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assert_false(rbtn_red_get(node_t, link, right_node),
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"Node should be black");
}
if (node == nil)
return (ret);
/* Self. */
assert_u32_eq(node->magic, NODE_MAGIC, "Bad magic");
/* Left subtree. */
if (left_node != nil)
ret += tree_recurse(left_node, black_height, black_depth, nil);
else
ret += (black_depth != black_height);
/* Right subtree. */
if (right_node != nil)
ret += tree_recurse(right_node, black_height, black_depth, nil);
else
ret += (black_depth != black_height);
return (ret);
}
static node_t *
tree_iterate_cb(tree_t *tree, node_t *node, void *data)
{
unsigned *i = (unsigned *)data;
node_t *search_node;
assert_u32_eq(node->magic, NODE_MAGIC, "Bad magic");
/* Test rb_search(). */
search_node = tree_search(tree, node);
assert_ptr_eq(search_node, node,
"tree_search() returned unexpected node");
/* Test rb_nsearch(). */
search_node = tree_nsearch(tree, node);
assert_ptr_eq(search_node, node,
"tree_nsearch() returned unexpected node");
/* Test rb_psearch(). */
search_node = tree_psearch(tree, node);
assert_ptr_eq(search_node, node,
"tree_psearch() returned unexpected node");
(*i)++;
return (NULL);
}
static unsigned
tree_iterate(tree_t *tree)
{
unsigned i;
i = 0;
tree_iter(tree, NULL, tree_iterate_cb, (void *)&i);
return (i);
}
static unsigned
tree_iterate_reverse(tree_t *tree)
{
unsigned i;
i = 0;
tree_reverse_iter(tree, NULL, tree_iterate_cb, (void *)&i);
return (i);
}
static void
node_remove(tree_t *tree, node_t *node, unsigned nnodes)
{
node_t *search_node;
unsigned black_height, imbalances;
tree_remove(tree, node);
/* Test rb_nsearch(). */
search_node = tree_nsearch(tree, node);
if (search_node != NULL) {
assert_u64_ge(search_node->key, node->key,
"Key ordering error");
}
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/* Test rb_psearch(). */
search_node = tree_psearch(tree, node);
if (search_node != NULL) {
assert_u64_le(search_node->key, node->key,
"Key ordering error");
}
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node->magic = 0;
rbtn_black_height(node_t, link, tree, black_height);
imbalances = tree_recurse(tree->rbt_root, black_height, 0,
&(tree->rbt_nil));
assert_u_eq(imbalances, 0, "Tree is unbalanced");
assert_u_eq(tree_iterate(tree), nnodes-1,
"Unexpected node iteration count");
assert_u_eq(tree_iterate_reverse(tree), nnodes-1,
"Unexpected node iteration count");
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}
static node_t *
remove_iterate_cb(tree_t *tree, node_t *node, void *data)
{
unsigned *nnodes = (unsigned *)data;
node_t *ret = tree_next(tree, node);
node_remove(tree, node, *nnodes);
return (ret);
}
static node_t *
remove_reverse_iterate_cb(tree_t *tree, node_t *node, void *data)
{
unsigned *nnodes = (unsigned *)data;
node_t *ret = tree_prev(tree, node);
node_remove(tree, node, *nnodes);
return (ret);
}
TEST_BEGIN(test_rb_random)
{
#define NNODES 25
#define NBAGS 250
#define SEED 42
sfmt_t *sfmt;
uint64_t bag[NNODES];
tree_t tree;
node_t nodes[NNODES];
unsigned i, j, k, black_height, imbalances;
sfmt = init_gen_rand(SEED);
for (i = 0; i < NBAGS; i++) {
switch (i) {
case 0:
/* Insert in order. */
for (j = 0; j < NNODES; j++)
bag[j] = j;
break;
case 1:
/* Insert in reverse order. */
for (j = 0; j < NNODES; j++)
bag[j] = NNODES - j - 1;
break;
default:
for (j = 0; j < NNODES; j++)
bag[j] = gen_rand64_range(sfmt, NNODES);
}
for (j = 1; j <= NNODES; j++) {
/* Initialize tree and nodes. */
tree_new(&tree);
tree.rbt_nil.magic = 0;
for (k = 0; k < j; k++) {
nodes[k].magic = NODE_MAGIC;
nodes[k].key = bag[k];
}
/* Insert nodes. */
for (k = 0; k < j; k++) {
tree_insert(&tree, &nodes[k]);
rbtn_black_height(node_t, link, &tree,
black_height);
imbalances = tree_recurse(tree.rbt_root,
black_height, 0, &(tree.rbt_nil));
assert_u_eq(imbalances, 0,
"Tree is unbalanced");
assert_u_eq(tree_iterate(&tree), k+1,
"Unexpected node iteration count");
assert_u_eq(tree_iterate_reverse(&tree), k+1,
"Unexpected node iteration count");
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assert_false(tree_empty(&tree),
"Tree should not be empty");
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assert_ptr_not_null(tree_first(&tree),
"Tree should not be empty");
assert_ptr_not_null(tree_last(&tree),
"Tree should not be empty");
tree_next(&tree, &nodes[k]);
tree_prev(&tree, &nodes[k]);
}
/* Remove nodes. */
switch (i % 4) {
case 0:
for (k = 0; k < j; k++)
node_remove(&tree, &nodes[k], j - k);
break;
case 1:
for (k = j; k > 0; k--)
node_remove(&tree, &nodes[k-1], k);
break;
case 2: {
node_t *start;
unsigned nnodes = j;
start = NULL;
do {
start = tree_iter(&tree, start,
remove_iterate_cb, (void *)&nnodes);
nnodes--;
} while (start != NULL);
assert_u_eq(nnodes, 0,
"Removal terminated early");
break;
} case 3: {
node_t *start;
unsigned nnodes = j;
start = NULL;
do {
start = tree_reverse_iter(&tree, start,
remove_reverse_iterate_cb,
(void *)&nnodes);
nnodes--;
} while (start != NULL);
assert_u_eq(nnodes, 0,
"Removal terminated early");
break;
} default:
not_reached();
}
}
}
fini_gen_rand(sfmt);
#undef NNODES
#undef NBAGS
#undef SEED
}
TEST_END
int
main(void)
{
return (test(
test_rb_empty,
test_rb_random));
}