ASSIGNMENTS for Lab Session 1

1. 1

   Develop the class ThreadSeqID with the static method get() that returns the ID of the calling thread. IDs are progressive int values, >=0, to be assigned according to the request order.

2. 2

   Define the interface for a shared counter.

3. 3

   Develop a program that, making use of a shared counter that is not thread-safe, clearly shows the problems deriving from data races.

4. 4

   Develop a correct version of the previous program (with a thread-safe shared counter).

5. 5

   Develop a version of the previous program with an implementation of the (shared) counter based on ThreadLocal.

6. 6

   Implement a Lock to be used by only two threads, recurring to the Peterson's algorithm. Use such Lock in a program where two threads concurrently make use of a shared data structure, assuring a proper access.