mmio is a really simple, really small library for handling memory-mapped io on windows and linux.

A couple reasons:

• It requires you to use Boost.
• Passing unicode paths requires you to use boost::filesystem, which requires you to use even more of Boost, and interops pretty terribly with std::filesystem.

Being a header only library, it includes system headers into your code, and I don't enjoy fighting tooth and nail with windows.h for common identifiers.