Atomic Stack Assignment

Motivation

We will build a thread-safe implementation of a Stack using atomics.

Background

Atomics

AtomicReference<V>

get()

compareAndSet(expect, update)

Code To Implement

AtomicStack

While ConcurrentStack could simply rely on synchronized to provide thread-safety, AtomicStack must change its data structure. To be @ThreadSafe, AtomicStack must correctly use AtomicReference<V>.

Do NOT hold any intrinsic locks (via synchronized) or hold any explicit Locks. It would be wasteful (and missing the point) to pay the lock overhead when the AtomicReference will get the job done.

class:	AtomicStack.java
methods:	constructor push peek pop
package:	stack.atomic.exercise
source folder:	student/src/main/java

constructor and instance variables

Be sure to initialize whatever state you need to implement a mutable thread-safe Stack using atomics.

Testing

class:	__AtomicStackTestSuite.java
package:	stack.atomic.exercise
source folder:	testing/src/test/java

Pledge, Acknowledgments, Citations

file:

atomic-stack-pledge-acknowledgments-citations.txt

More info about the Honor Pledge