1) Yeah I guess that's what semaphores are for, but the way to mitigate that is to block in a different queue. :-) Not saying this is the right way, I am saying

1) Yeah I guess that's what semaphores are for, but the way to mitigate that is to block in a different queue. :-) Not saying this is the right way, I am saying this is part of me refactoring deep nested blocks. It's the middle ground before doing it properly. 2) Not sure what you mean here. A semaphore has a counter. You can signal for one run and only one if you want. 3)Not sure what this means, I suppose I gotta' read up 4) Yeah, this is where semaphores get ugly. Thanks for taking your time. Appreciate it.