/*
* EFFECT:
* - put cmd to node
* ENTER:
* - node is already locked(L_WRITE)
* EXITS:
* - node is locked
*/
void node_put_cmd(struct tree *t, struct node *node, struct bt_cmd *cmd)
{
if (nessunlikely(node->height == 0)) {
leaf_put_cmd(node, cmd);
status_increment(&t->e->status->tree_leaf_put_nums);
} else {
nonleaf_put_cmd(node, cmd);
status_increment(&t->e->status->tree_nonleaf_put_nums);
}
}
/*
* apply parent's [leaf, right] messages to child node
*/
void _apply_msg_to_child(struct node *parent,
int child_num,
struct node *child,
struct msg *left,
struct msg *right)
{
int height;
struct basement *bsm;
struct basement_iter iter;
nassert(child != NULL);
nassert(parent->height > 0);
height = child->height;
if (height == 0)
bsm = child->u.l.le->bsm;
else
bsm = child->u.n.parts[child_num].buffer;
basement_iter_init(&iter, bsm);
basement_iter_seek(&iter, left);
while (basement_iter_valid_lessorequal(&iter, right)) {
struct bt_cmd cmd = {
.msn = iter.msn,
.type = iter.type,
.key = &iter.key,
.val = &iter.val,
.xidpair = iter.xidpair
};
if (nessunlikely(height == 0))
leaf_put_cmd(child, &cmd);
else
nonleaf_put_cmd(child, &cmd);
}
}
/*
* apply msgs from ances to leaf basement which are between(include) left and right
* REQUIRES:
* 1) leaf write-lock
* 2) ances all write-lock
*/
int leaf_apply_ancestors(struct node *leaf, struct ancestors *ances)
{
struct ancestors *ance;
struct msg *left = NULL;
struct msg *right = NULL;
struct basement_iter iter;
struct basement *bsm = leaf->u.l.le->bsm;
basement_iter_init(&iter, bsm);
basement_iter_seektofirst(&iter);
if (basement_iter_valid(&iter))
left = msgdup(&iter.key);
basement_iter_seektolast(&iter);
if (basement_iter_valid(&iter))
right = msgdup(&iter.key);
ance = ances;
while (ance && ance->next) {
/* apply [leaf, right] to leaf */
_apply_msg_to_child(ance->v,
ance->childnum,
ance->next->v,
left,
right);
ance = ances->next;
}
msgfree(left);
msgfree(right);
return NESS_OK;
}
