node_pointer* complete_new_btree(couchfile_modify_result* mr, couchstore_error_t *errcode)
{
*errcode = flush_mr(mr);
if(*errcode != COUCHSTORE_SUCCESS) {
return NULL;
}
couchfile_modify_result* targ_mr = make_modres(mr->arena, mr->rq);
if (!targ_mr) {
*errcode = COUCHSTORE_ERROR_ALLOC_FAIL;
return NULL;
}
targ_mr->modified = 1;
targ_mr->node_type = KP_NODE;
*errcode = mr_move_pointers(mr, targ_mr);
if(*errcode != COUCHSTORE_SUCCESS) {
return NULL;
}
node_pointer* ret_ptr;
if(targ_mr->count > 1 || targ_mr->pointers != targ_mr->pointers_end) {
ret_ptr = finish_root(mr->rq, targ_mr, errcode);
} else {
ret_ptr = targ_mr->values_end->pointer;
}
return copy_node_pointer(ret_ptr);
}
couchfile_pointer_info* modify_btree(couchfile_modify_request *rq,
couchfile_pointer_info *root, int *errcode)
{
couchfile_pointer_info* ret_ptr = root;
couchfile_modify_result* root_result = make_modres(rq);
root_result->node_type = KP_NODE;
*errcode = modify_node(rq, root, 0, rq->num_actions, root_result);
if(*errcode < 0)
{
free_modres(root_result);
return NULL;
}
if(root_result->values_end->value.pointer == root)
{
//If we got the root pointer back, remove it from the list
//so we don't try to free it.
root_result->values_end->value.mem = NULL;
}
if(!root_result->modified)
{
free_modres(root_result);
}
else
{
if(root_result->count > 1 || root_result->pointers != root_result->pointers_end)
{
//The root was split
//Write it to disk and return the pointer to it.
ret_ptr = finish_root(rq, root_result, errcode);
if(*errcode < 0)
{
ret_ptr = NULL;
}
}
else
{
ret_ptr = root_result->values_end->value.pointer;
root_result->values_end->value.mem = NULL;
free_modres(root_result);
}
}
return ret_ptr;
}
node_pointer *modify_btree(couchfile_modify_request *rq,
node_pointer *root,
couchstore_error_t *errcode)
{
arena* a = new_arena(0);
node_pointer *ret_ptr = root;
couchfile_modify_result *root_result = make_modres(a, rq);
if (!root_result) {
delete_arena(a);
*errcode = COUCHSTORE_ERROR_ALLOC_FAIL;
return root;
}
root_result->node_type = KP_NODE;
*errcode = modify_node(rq, root, 0, rq->num_actions, root_result);
if (*errcode < 0) {
delete_arena(a);
return NULL;
}
if (root_result->values_end->pointer == root) {
//If we got the root pointer back, remove it from the list
//so we don't try to free it.
root_result->values_end->pointer = NULL;
}
if (root_result->modified) {
if (root_result->count > 1 || root_result->pointers != root_result->pointers_end) {
//The root was split
//Write it to disk and return the pointer to it.
ret_ptr = finish_root(rq, root_result, errcode);
if (*errcode < 0) {
ret_ptr = NULL;
}
} else {
ret_ptr = root_result->values_end->pointer;
}
}
if (ret_ptr != root) {
ret_ptr = copy_node_pointer(ret_ptr);
}
delete_arena(a);
return ret_ptr;
}