https://github.com/devarshi16/multicoaster-semaphore

5.8 The roller coaster problem This problem is from Andrews’s Concurrent Programming [1], but he attributes it to J. S. Herman’s Master’s thesis. Suppose there are n passenger threads and a car thread. The passengers repeatedly wait to take rides in the car, which can hold C passengers, where C < n. The car can go around the tracks only when it is full. Here are some additional details: • Passengers should invoke board and unboard. • The car should invoke load, run and unload. • Passengers cannot board until the car has invoked load • The car cannot depart until C passengers have boarded. • Passengers cannot unboard until the car has invoked unload. Puzzle: Write code for the passengers and car that enforces these constraints.

puzzle pygame python roller-coaster-problem semaphores threading

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