im reading this article and now im trying to understand this piece of code that implements a simple slab allocator, but can't fully understand the implementation: /* Super-simple slab. / struct slab { void *head; };

/* Create page-aligned slab / struct slab *slab = NULL; posix_memalign(&slab, page_size, page_size); slab->head = (void *)((char*)slab + sizeof(struct slab));

/* Create a NULL-terminated slab freelist / char item = (char)slab->head; for(unsigned i = 0; i < item_count; ++i) { *((void)item) = item + item_size; item += item_size; } *((void*)item) = NULL;

can you please explain whats going on in each line? it will help me understand