Question

write a C/C++ program which simulates the Producer/Consumer program in Figure 5.16 with a buffer size of one thousand. Allow the Producer to generate one million items. Use ten consumers. The program needs to perform a normal exit process after all items are consumed. Both the Producer (singular) and Consumers are to be runs as separate processes generated via fork(). The program must us Linux semaphores. The program must clean up the semaphores used and zombies created before termination. Report the number of items that each consumer obtained. Do the counts meet expectations?

/* program boundedbuffer */ const int sizeofbuffer = /* buffer size */; semaphore s = 1, n= 0, e= sizeofbuffer; void producer() { while (true) { produce(); semwait(e); semwait(s); append(); semSignal(s); semSignal(n); } } void consumer() { while (true) { semwait(n); semwait(s); take(); semSignal(s); semSignal(e); consume(); } } void main() { parbegin (producer, consumer); } Figure 5.16 A Solution to the Bounded-Buffer Producer/Consumer Problem Using Semanhares

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Answer 1

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