The code was more or less found on various places on the net, here is a link I found searching now:

• http://stackoverflow.com/questions/150355/programmatically-find-the-number-of-cores-on-a-machine

It is a bit old, indeed, but shows that bsd was using the same way as mac os x. I didn't have a *BSD at hand to try, though. Maybe the GNU extension with _SC_NPROCESSORS_ONLN got into *BSD, but wonder if the includes are not different, as for Linux.

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