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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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