5.3.1 What is semaphore? (4/10) Semaphore is a ty pe of generalized lock Defined by dijkstra in the last 60s Main synchronization primitives used in UNIX5.3.1 What is semaphore?(4/10) • Semaphore is a type of generalized lock • Defined by Dijkstra in the last 60s • Main synchronization primitives used in UNIX 7