https://github.com/danburkert/memmap-rs/issues/32
https://github.com/danburkert/memmap-rs/issues/34
https://github.com/danburkert/memmap-rs/issues/35
https://github.com/danburkert/memmap-rs/issues/37
https://github.com/danburkert/memmap-rs/issues/33