3) Semaphore operations P() and V() are assumed to be atomic Assumi

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3) Semaphore operations P() and V() are assumed to be

atomic. Assuming that a test_and_set() operation is

available, show how atomic semaphore operations could

be implemented. You must define the semaphore data type

with all its corresponding operations.

4) Write a program consisting of 3 processes that

deadlock.

Solution

3)Counting Semaphore:

}

Down(Semaphore S)

if(s.value<0)

{

put process (PCB) in l1;

sleep();

}

else

return;

}

Up(Semaphore S)

{

S.value = S.value + 1;

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3) Semaphore operations P() and V() are assumed to be atomic. Assuming that a test_and_set() operation is available, show how atomic semaphore operations could be implemented. You must define the semaphore data type with all its corresponding operations. 4) Write a program consisting of 3 processes that deadlock. Solution 3)Counting Semaphore: } Down(Semaphore S) if(s.value ...
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