Blocking operations are operations that block the execution of the current thread until an event occurs. Typical blocking operations are those that involve input or output operations with the console, a file, or network.
If you use a blocking operation inside the critical section of a lock, you're deteriorating the performance of the application. While a thread is waiting for the event that would finish the blocking operation, the rest of the application might be waiting for the same event as well; however, none of the other threads will have access to the critical section and execute its code (the code of the critical section).
In this recipe, you will implement an example of this situation. The threads read a line from the console inside the critical section. This instruction makes the rest of the threads of the application will be blocked until the user...
