In the producer–consumer fable, we assumed that Bob can see whether the can on Alice’s windowsill is up or down. Design a producer–consumer proto colusing cans and strings that works even if Bob...

In the producer–consumer fable, we assumed that Bob can see whether the can on Alice’s windowsill is up or down. Design a producer–consumer proto colusing cans and strings that works even if Bob cannot see the state of Alice’s can (this is how real-world interrupt bits work).