Program to Explain Mutual Exclusion

Aim: Write a Program to Explain Mutual Exclusion
MSc IT Parallel Processing Practical No. 4
Index of all Practicals ~ Click Here

Code:

#include<stdio.h>
#include"shmlib.h"

int main()
{
   
    int id,id1,id2,id3;
    int *inventory;
    int *lock1,*lock2,i;
    inventory=(int *)shared(sizeof(int),&id1);

    lock1=(int *)shared(sizeof(int),&id2);
    lock2=(int *)shared(sizeof(int),&id3);

    lock_init(lock1);
    for(i=0;i<4;i++)
    {
        lock(lock1);
        *inventory=*inventory+2;
        printf("The value in the inventory is: after producing is %d\n\n",*inventory);
        unlock(lock1);
       
       
        lock(lock2);
        *inventory=*inventory-1;
        printf("The value in the inventory  after consuming is: %d\n\n",*inventory);
        unlock(lock2);
    }
   
    return 0;
}

Output: