Fast bulk load with API?

I have a windows service (like a Unix daemon) that loads flat files into an 8.1.7 database. I use Oracle Objects for this, but it takes a very long time, especially with CLOBs to do > 10,000 records. I would use SQL Loader, but because this is a service, I can't spawn SQLLoader to do the load for me.

Is there a SQLLoader-type API that I can call to do the same functionality from within my program?

Thanks,