On Wed, Sep 23, 2020 at 10:34:23PM +0200, Maximilian Luz wrote: > In short: Concurrent execution of the counter functions works, as far as > I can tell at least, and, as you see by the long answer, I have to spend > some time and think about the duplicate-value problem (again). If you've > managed to read through this wall of text (sorry about that) and you > have any ideas/preferences, please let me know. No, this all answers my question really well, thanks, what you have now is fine, no need to change it. thanks, greg k-h