Get your hands dirty with Threads and Semaphore [pdf]

There&#x27;s also the free textbook <i>The Little Book of Semaphores</i>:<p><a href="http://greenteapress.com/semaphores/" rel="nofollow">http:&#x2F;&#x2F;greenteapress.com&#x2F;semaphores&#x2F;</a>