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17 lines
428 B
17 lines
428 B
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Exercise 3.47: A semaphore (of size
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n
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) is a
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generalization of a mutex. Like a mutex, a semaphore supports acquire and
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release operations, but it is more general in that up to
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n
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processes can
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acquire it concurrently. Additional processes that attempt to acquire the
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semaphore must wait for release operations. Give implementations of semaphores
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in terms of mutexes
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in terms of atomic test-and-set! operations.
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