Another example of arbitrary pointer comparison I'm familiar with is for resolving lock ordering problems. If I have a big set of locks that I need to take to c

Another example of arbitrary pointer comparison I'm familiar with is for resolving lock ordering problems. If I have a big set of locks that I need to take to complete a particular operation, a simple way to prevent deadlocking is to acquire those locks in the order of their pointers. E.g. if I have three locks I need to take, lock_t *a = (lock_t *)0x100; lock_t *b = (lock_t *)0x300; lock_t *c = (lock_t *)0x200; then I'll take them in order a, c, b;