Definitely not on Windows.  You will need to come up with a different 
lock strategy not dependent on the file system.  I ran into this while 
trying to use file locks to sync separate java processes.  There is no 
atomic createAndLockFile on Windows.

All unix based systems should be fine though.

On Friday, March 14, 2003, at 11:10  AM, Cees de Groot wrote:

> Update: David has allowed me to redistribute OmniBase for Squeak.
>
> Now, I want to enhance the file plugin with a locking primitive. Are 
> the
> posix lockf() semantics available on all the platforms?
>
>
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