... College. I used the first edition of The Little Book of Semaphores along with one of the standard textbooks, and I taught Synchronization as aconcurrent thread for the duration of the course. Each ... time, the value of the semaphore represents the number of additionalthreads that may enter. If the value is zero, then the next thread will blockuntil one of the threads inside exits and signals. ... n = 5 and that 4 threads are waiting at the barrier. The value of the semaphore is the number of threads in queue, negated,which is -4.When the 5th thread signals the barrier, one of the waiting...