Error

Global kdbbReadLock

sets KDB_ERR_NOLOCK when locking failed

Global kdbbUnlock

sets KDB_ERR_NOLOCK when locking failed

Global kdbbWriteLock

sets KDB_ERR_NOLOCK when locking failed

Global kdbSet_backend

In normal execution cases a positive value will be returned. But in some cases you are not able to set keys and have to return -1. If you declare kdbcGetnoError() you are done, but otherwise you have to set the cause of the error. (Will be added with 0.7.1)