Question: The compare _ and _ swap ( ) instruction can be used to design lock - free data structures such as stacks, queues, and lists.

The compare

_

and

_

swap

()

instruction can be used to design lock

-

free data structures such as stacks, queues, and lists. The program example shown in Figure

6.18

presents a possible solution to a lock

-

free stack using CAS instructions, where the stack is represented as a linked list of Node elements with top representing the top of the stack. Is this implementation free from race conditions?

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