1 Testing multiple priority donation.
2 If the statements printed below are all true, you pass.
3 1. Main thread should have priority 30. Actual priority: 30.
4 2. Main thread should have priority 31. Actual priority: 31.
5 3. Thread b acquired lock b.
7 5. Thread b should have just finished.
8 6. Main thread should have priority 30. Actual priority: 30.
9 7. Thread a acquired lock a.
11 9. Thread a should have just finished.
12 10. Main thread should have priority 29. Actual priority: 29.
13 Multiple priority priority donation test finished.