Doubt on test and set

Question

https://gateoverflow.in/1319/gate2009-33

In above link , test-and-set is deadlock-free but

https://gateoverflow.in/871/gate2002-18-a

It is not deadlock-free here.

It will be helpful if somebody clarify it : )

Answer 1

I studied that test and set lock(TSL) is free from deadlock.

Comments

https://drive.google.com/file/d/0By-VZ5fZo_6iOFJjUVBVNXZLVzA/view

Check Q.66

The TEST-AND-SET function is atomic.

It is deadlock free but not starvation free.

---

Thanks but  I am referring the same question though.

But solution to that question differ in the following link

https://gateoverflow.in/871/gate2002-18-a

But it says " TSL is not atomic" . You can look at it.

---

Read the question properly. Question 66(iii). It is said in the question to assume that TSL is not atomic.