The Little Book of Semaphores

Even after working with threads (in Java) for several years, I have feeling that I don't understand why Java allowed things in a certain way. In short, I don't feel ok not knowing the design considerations of threads in Java.

My way of address this:

• Know threads from the basic. I am going back to good old Unix. This will be a one-month project. Outcomes to be blogged here.
  
• Know JVM. This will be a three-month project. Outcomes to be blogged here.
  

There is a free book on semaphore, called "The Little Book of Semaphores". The author is teacher and knows well why students do/don't understand semaphore. This will be my starting point. I've read first two chapters, and I think it is a good one.

Links:

• The Little Book of Semaphores, by Allen B. Downey