Main     Thread     Thread
  |         |          |
  |         |          |
  |      Critical   Blocked
  |      Section    Blocked
  |         |          |
  |      Blocked    Critical
  |      Blocked    Section
  |        |           |




Main          Thread     Thread
  |              |          |
  |         Synchronize     |
  |       _______/          |
          |                 |
Blocked   | This            |
Running   | is now          |
Thread    | in main         |
 Code     |                 |
          |                 |
          \_______          |
Resume           |          |
  |              |          |
  |              |          |