How to determine the core currently used?

Hi,
does anybody knows a Java SE6 method that gets the current processor number?
It should run at least on WindowsXP with a dual core.
I'm aware of the fact that the core currently used is a very ephemeral information. Nevertheless I want to verify whether assumptions about the scheduling are correct.
All solutions without using JNI are welcome.
Thanks in advance
-- Thomas

I doubt it is possible. I am not even sure how you would do that with the windows API. Not sure it is even logical. Since a thread switch can occur at any time that means that an atomic operation would be needed to recover it and that going up/down the call stack to that point would all be places where it would become invalid.

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