The following exercises cover the various topics from this chapter. Most of the exercises require implementing new concurrent data structures using atomic variables and the CAS instruction. These data structures can also be solved using the synchronized
statement, so it is helpful to contrast the advantages of the two approaches:
Implement a custom
ExecutionContext
class calledPiggybackContext
, which executesRunnable
objects on the same thread that calls theexecute
method. Ensure that aRunnable
object executing on thePiggybackContext
can also call theexecute
method and that exceptions are properly reported.Implement a
TreiberStack
class, which implements a concurrent stack abstraction:class TreiberStack[T] { def push(x: T): Unit = ??? def pop(): T = ??? }
Use an atomic reference variable that points to a linked list of nodes that were previously pushed to the stack. Make sure that your implementation...