Producer And Consumer CS1254 Operating Systems lap Linux based

Implement the Producer – Consumer problem using semaphores. Using semaphore it solve the problem between producer and consumer
Source code bash shell Programming Algorithm
#include<stdio.h>
int mutex=1,full=0,empty=3,x=0;
main()
{
int n;
void producer();
void consumer();
int wait(int);
int signal(int);
printf(“\n 1.Producer \n 2.Consumer \n 3.Exit”);
while(1)
{
printf(“\n Enter your choice:”);
scanf(“%d”,&n);
switch(n)
{
case 1:
if((mutex==1)&&(empty!=0))
producer();
else
printf(“Buffer is full”);
break;
case 2:
if((mutex==1)&&(full!=0))
consumer();
else
printf(“Buffer is empty”);
break;
case 3:
exit(0);
break;
}
}
}

int wait(int s)
{
return (--s);
}
int signal(int s)
{
return(++s);
}
void producer()
{
mutex=wait(mutex);
full=signal(full);
empty=wait(empty);
x++;
printf(“\n Producer produces the item %d”,x);
mutex=signal(mutex);
}
void consumer()
{
mutex=wait(mutex);
full=wait(full);
empty=signal(empty);
printf(“\n Consumer consumes item %d”,x);
x--;
mutex=signal(mutex);
}

OUTPUT CS1254 Operating Systems lap Linux based
[redhat35@localhost Rhel5]$ cc pc.c
1.Producer
2.Consumer
3.Exit
Enter your choice:1
Producer produces the item 1
Enter your choice:1
Producer produces the item 2
Enter your choice:1
Producer produces the item 3
Enter your choice:1
Buffer is full
Enter your choice:2
Consumer consumes item 3
Enter your choice:2
Consumer consumes item 2
Enter your choice:2
Consumer consumes item 1
Enter your choice:2
Buffer is empty
Enter your choice:3

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