A bus base multiprocessor uses snoopy cache to pull off a coherent memoryWill semaphores work on this m/c?
arely used contained by practice?releated to distributed computing
Answer:
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A semaphore is a protected variable (or abstract facts type) and constitutes the classic method for restricting access to shared resources (e.g. storage) in a multiprogramming environment. They be invented by Edsger Dijkstra and first used in the THE operating system.
The helpfulness of the semaphore is initialized to the number of equivalent shared resources it is implemented to control. In the special crust where at hand is a single equivalent shared resource, the semaphore is called a binary semaphore. The nonspecific case semaphore is repeatedly called a counting semaphore.
Semaphores are the classic solution to the dining philosophers problem, although they do not prevent adjectives deadlocks.
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