5.3 Semaphores 5.3.1 What is semaphore? 5.3.2 Two Uses of Semaphores 5.3.3 Producer/consumer problem 5.3.4 Implement of Semaphores .5.3.5 Semaphore in UNIX14 5.3 Semaphores • 5.3.1 What is semaphore? • 5.3.2 Two Uses of Semaphores • 5.3.3 Producer/Consumer Problem • 5.3.4 Implement of Semaphores • 5.3.5 Semaphore in UNIX