/* actual insert: returns true -> insert ok or key found, false -> alloc failure */
bool cbtree_insert(struct CBTree *tree, void *obj)
{
const void *key, *old_key;
unsigned newbit, klen, old_klen;
void *old_obj;
if (!tree->root)
return insert_first(tree, obj);
/* current key */
klen = get_key(tree, obj, &key);
/* nearest key in tree */
old_obj = raw_lookup(tree, key, klen);
old_klen = get_key(tree, old_obj, &old_key);
/* first differing bit is the target position */
newbit = find_crit_bit(key, klen, old_key, old_klen);
if (newbit == SAME_KEY)
return true;
return insert_at(tree, newbit, key, klen, obj);
}
/**
* Insert or update the given value under the given key.
*
* The map takes ownership of the value.
*
* @param key The key to insert under.
* @param value The value to be inserted.
*
* @return 0 on success, negative values on error.
*/
int
insert(key_type key, value_type value)
{
auto dest_entry = root;
while (dest_entry->inode != nullptr) {
auto n = dest_entry->inode;
dest_entry = n->entries[BIT_IS_SET(key, n->diff)];
}
entry e(key, value);
auto pop = nvobj::pool_by_vptr(this);
nvobj::transaction::exec_tx(pop, [&] {
if (dest_entry->key == 0 || dest_entry->key == key) {
nvobj::delete_persistent<T>(dest_entry->value);
*dest_entry = e;
} else {
insert_leaf(&e, find_crit_bit(dest_entry->key,
key));
}
});
return 0;
}
/*
* ctree_insert -- inserts a new key into the tree
*/
int
ctree_insert(struct ctree *t, uint64_t key)
{
void **dst = &t->root;
struct node *a = NULL;
int err;
if ((err = pthread_mutex_lock(&t->lock)) != 0)
return err;
/* descend the path until a best matching key is found */
while (NODE_IS_INTERNAL(*dst)) {
a = NODE_INTERNAL_GET(*dst);
dst = &a->slots[BIT_IS_SET(key, a->diff)];
}
uint64_t *dstkeyp = *dst;
uint64_t *kp = Malloc(sizeof (uint64_t)); /* allocate leaf node */
if (kp == NULL) {
err = ENOMEM;
goto error_leaf_malloc;
}
*kp = key;
if (dstkeyp == NULL) { /* root */
*dst = kp;
goto out;
}
uint64_t dstkey = *dstkeyp;
struct node *n = Malloc(sizeof (*n)); /* internal node */
if (n == NULL) {
err = ENOMEM;
goto error_internal_Malloc;
}
if (dstkey == key) {
err = EINVAL;
goto error_duplicate;
}
n->diff = find_crit_bit(dstkey, key);
/* insert the node at the direction based on the critical bit */
int d = BIT_IS_SET(key, n->diff);
n->slots[d] = kp;
/* find the appropriate position in the tree to insert the node */
dst = &t->root;
while (NODE_IS_INTERNAL(*dst)) {
a = NODE_INTERNAL_GET(*dst);
/* the critical bits have to be sorted */
if (a->diff < n->diff) break;
dst = &a->slots[BIT_IS_SET(key, a->diff)];
}
/* insert the found destination in the other slot */
n->slots[!d] = *dst;
NODE_INTERNAL_SET(*dst, n);
out:
if ((errno = pthread_mutex_unlock(&t->lock)) != 0)
ERR("!pthread_mutex_unlock");
return err;
error_internal_Malloc:
Free(kp);
error_duplicate:
Free(n);
error_leaf_malloc:
if ((errno = pthread_mutex_unlock(&t->lock)) != 0)
ERR("!pthread_mutex_unlock");
return err;
}
