GATE CSE 1999 | Question: 20-a

Question

A certain processor provides a 'test and set' instruction that is used as follows:

  TSET register, flag

This instruction atomically copies flag to register and sets flag to $1$. Give pseudo-code for implementing the entry and exit code to a critical region using this instruction.

Comments

option B shows the disadvantages of using sleep() and wait() calls as wakeups can't be saved for the future use. And thus we go for the semaphores.

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why did you removed part b

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The question is incomplete. Please do complete it...

https://www.geeksforgeeks.org/gate-gate-cs-1999-question-68/

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2^nd part of the question: Operating System: GATE CSE 1999 | Question: 20-b (gateoverflow.in)

Answer 1

Solution:-

Answer 2

I think this is solution...please comment if something is wrong