title: Is multiple-producer, single-consumer possible in a lockfree setting?
body: <p>I have a bunch of threads that are doing lots of communication with each other.
  I would prefer this be lock free.</p>
  
  <p>For each thread, I want to have a mailbox, where other threads can send it messages, (but only the owner can remove messages). This is a multiple-producer single-consumer situation. is it possible for me to do this in a lockfree / high performance matter? (This is in the inner loop of a gigantic simulation.)</p>