Program14.c

#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\n");
	while(1) 
	{
		printf("\nENTER YOUR CHOICE\n");
		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); ssss
}
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);
	mutex=signal(mutex); 
}
void consumer() 
{
	mutex=wait(mutex);
	full=wait(full);
	empty=signal(empty);
	printf("\nCONSUMER CONSUMES THE ITEM %d.",x);
	x--;
	mutex=signal(mutex); 
}