MAP_ANONYMOUS
#ifdef MAP_ANONYMOUS
#ifdef MAP_ANONYMOUS
flags |= MAP_ANONYMOUS;
#ifdef MAP_ANONYMOUS
ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
#ifndef MAP_ANONYMOUS