1) For the following “Producer-consumer Problem using Semaphores”, (a) Will there be any deadlock if the order of the downs were switched, for the producer or for the consumer individually as well as together (so, 3 combinations)? Explain. Now, (b) similarly consider the order of ups and show (3 combinations again) – when you assume that the ups are switched then keep the downs intact (not switched). semaphore mutex = 1; /* binary semaphore providing mutual exclusion */semaphore empty = N; /* counting semaphore, counts empty buffer slots */semaphore full = 0; /* counting semaphore, counts full buffer slots */void producer(void){while(TRUE)}{int item = produce_item();down(&empty);down(&mutex); // Enter CRinsert_item(item); //put in bufferup(&mutex); // Leave CRup(&full);void consumer(void){while(TRUE)down(&full);down(&mutex); // Enter CRint item = remove_item(); //remove item from bufferup(&mutex); // Leave CRup(&empty);consume_item(item); // do something with it{}

buffer access to consumer ,so that item can be inserted. ii] Same will be for consumer,Changing…

Answered: 1) For the following “Producer-consumer…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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1) For the following “Producer-consumer Problem using Semaphores”, (a) Will there be any deadlock if the order of the downs were switched, for the producer or for the consumer individually as well as together (so, 3 combinations)? Explain. Now, (b) similarly consider the order of ups and show (3 combinations again) – when you assume that the ups are switched then keep the downs intact (not switched).

semaphore mutex = 1; /* binary semaphore providing mutual exclusion */
semaphore empty = N; /* counting semaphore, counts empty buffer slots */
semaphore full = 0; /* counting semaphore, counts full buffer slots */
void producer(void)
{
while(TRUE)
}
{
int item = produce_item();
down(&empty);
down(&mutex); // Enter CR
insert_item(item); //put in buffer
up(&mutex); // Leave CR
up(&full);
void consumer(void)
{
while(TRUE)
down(&full);
down(&mutex); // Enter CR
int item = remove_item(); //remove item from buffer
up(&mutex); // Leave CR
up(&empty);
consume_item(item); // do something with it
{
}

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