Sema
#include<stdio.h> #include<stdlib.h> int mutex=1,full=0,empty=3,x=0; int main() { int n; void producer(); void consumer(); int wait(int); int signal(int); printf("\n1.Producer\n2.Consumer\n3.Exit"); while(1) { printf("\nEnter 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; } } return 0; } 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("\nProducer produces the item %d",x); full=wait(full); empty=signal(empty); printf("\nConsumer consumes item %d",x); x--; mutex=signal(mutex); }