And if both threads are doing a blocking read waiting for their message? Blocking locks, deadlocks, endless fun... But wait, you don't use blocking-IO, you pol

And if both threads are doing a blocking read waiting for their message? Blocking locks, deadlocks, endless fun... But wait, you don't use blocking-IO, you poll the sockets to see if there is data available, right? Do you realize what you are polling? (hint, it is global and mutable)