Yes, that one, thanks! I also remember one from Silberschatz's OS textbook about Deadlock that mentioned an old law which said that whenever two trains approac

Yes, that one, thanks! I also remember one from Silberschatz's OS textbook about Deadlock that mentioned an old law which said that whenever two trains approached an intersection, they both had to come to a full stop and none could move until the other one had left.