android - Store an address and a bool in one word for lock-free doubly linked list

Question

I am reading some paper for lock-free doubly linked list. In these papers, they store an address to next and prev node and a flag in one word(int).

Is it because in 32-bit architectures all addresses are aligned in 4 byte boundaries so all address are multiple of 4?

and if the reason is what i say is this code ok?

const int dMask = 1;
const int pMask = ~dMask;

int store(void* pPointer, bool pDel)
{
    return reinterpret_cast<int>(pPointer) | (int)pDel;
}

void load(int pData, void** pPointer, bool* pDel)
{
    *pPointer = reinterpret_cast<void*>(pData & pMask);
    *pDel = pData & dMask;
}

And another question: Do in other platforms such as Android mobile devices, above idea is correct?