What is a spin-then-yield lock? What is a bounded buffer? What is a semaphore? What operations does it support? How do binary and general semaphores differ? What is a monitor? How do monitor condition...

What is a spin-then-yield lock? What is a bounded buffer? What is a semaphore? What operations does it support? How do binary and general semaphores differ? What is a monitor? How do monitor condition variables differ from semaphores? Explain the difference between treating monitor signals as hints and treating them as absolutes.