There's a free book available on the subject of semaphores: The Little Book of Semaphores by Allen Downey http://greenteapress.com/semaphores/ http://greentea

There's a free book available on the subject of semaphores: The Little Book of Semaphores by Allen Downey http://greenteapress.com/semaphores/ http://greenteapress.com/semaphores/