コード例 #1
0
ファイル: dbxml.go プロジェクト: pebbe/dbxml
// Close a query that was created with Prepare()
//
// This is called automaticly when the database is closed.
func (query *Query) Close() {
	query.lock.Lock()
	defer query.lock.Unlock()
	if query.opened {
		C.c_dbxml_query_free(query.query)
		delete(query.db.queries, query.id)
		query.db = nil
		query.opened = false
	}
}
コード例 #2
0
ファイル: dbxml.go プロジェクト: pebbe/dbxml
// Prepare an XPATH query.
//
// The query can be run multiple times, and a running query can be cancelled by query.Cancel()
func (db *Db) Prepare(query string) (*Query, error) {
	q := &Query{}
	db.lock.Lock()
	defer db.lock.Unlock()

	if !db.opened {
		return q, errclosed
	}
	cs := C.CString(query)
	defer C.free(unsafe.Pointer(cs))
	q.query = C.c_dbxml_prepare_query(db.db, cs)
	if C.c_dbxml_get_prepared_error(q.query) != 0 {
		defer C.c_dbxml_query_free(q.query)
		return q, errors.New(C.GoString(C.c_dbxml_get_prepared_errstring(q.query)))
	}
	// No finalizer: query will be closed when database gets closed
	q.opened = true
	q.db = db
	q.id = db.counter
	db.counter++
	db.queries[q.id] = q
	return q, nil
}