mmap__mmap_len
mmap__mmap_len(map) - aio->size,
mmap__mmap_len(map), bf, size);
mmap_len = mmap__mmap_len(map);
map->aio.data[idx] = malloc(mmap__mmap_len(map));
munmap(map->data, mmap__mmap_len(map));
map->data = mmap(NULL, mmap__mmap_len(map), PROT_READ|PROT_WRITE,
map->aio.data[idx] = mmap(NULL, mmap__mmap_len(map), PROT_READ|PROT_WRITE,
munmap(map->aio.data[idx], mmap__mmap_len(map));
size_t mmap__mmap_len(struct mmap *map);