Exercise 8.8. Write a routine bfree(p,n) that will free any arbitrary block p of n characters into the free list maintained by malloc and free.

Exercise 8.8. Write a routine bfree(p,n) that will free any arbitrary block p of n characters into the free list maintained by malloc and free. By using bfree, a user can add a static or external array to the free list at any time.








unsigned bfree(char *p, unsigned n)
{
    Header *hp;
   
    if(n < sizeof(Header))
        return 0;
    hp = (Header *) p;
    hp->s.size = n / sizeof(Header);
    free((void *) (hp + 1));
    return hp->s.size;
}