[berkeley-db-devel] Does berkeley db support non-blocking calls?

Hi, I am using db-2.7.7 in my application which uses async I/O. Whilst making berkeley db api calls (get/put) it gets blocked on I/O. Does Berkeley db supports non blocking I/O ? If yes how ? If somehow berkeley api gives me the fd on which it's blocked, I can set that fd to non blocking I/O and put that in select (for async I/O). Please help. Thanks, Jayesh