OPERATING SYSTEM - SEMAPHORES 1. The following is a modified solution for the co
ID: 3751270 • Letter: O
Question
OPERATING SYSTEM - SEMAPHORES 1. The following is a modified solution for the consumer-producer problem, with bounded buffer. Does the solution work? If so, please defend your position. If not, please show a sequence of operations that leads to a failure of the solution. semaphore nLoadedBuffers 0; // consumer waits on 0 semaphore nFreeBuffers = N; // producer waits on 0, N >= 2 semaphore mutex = 1; // one thread waits when another // thread is modifying // the buffer Producer) P (nFreeBuffers): 2. P (mutex); 3. // put 1 item in the buffer 4. V (nLoadedBuffers) 5. V(mutex) Consumer ) 6. P (nLoadedBuffers) 7. P (mutex) 8. // take 1 item from the buffer 9. V (mutex) 10. V (nFreeBuffers)iExplanation / Answer
Yes ,this solution for Producer-Consumer problem with Bounded Buffer
will work nicely.
This solution allow producer and consumer to access common Buffer mutually
exclusively.
Producer:-
When producer produces an item then the value of nFreeBuffers is reduced by 1
because one slot will be filled now. The value of mutex is also reduced to
prevent consumer to access the buffer. Now, the producer has placed the item
and thus the value of nLoadedBuffers is increased by 1.
The value of mutex is also increased by 1 beacuse the task of producer has been
completed and consumer can access the buffer.
Consumer:-
The consumer is removing an item from buffer, therefore the value of
nLoadedBuffers is reduced by 1 and the value is mutex is also reduced so that
the producer cannot access the buffer at this moment.
Now, the consumer has consumed the item, thus increasing the value
of nFreeBuffers by 1. The value of mutex is also increased so that
producer can access the buffer now.
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