This is a WIP implementation of C code from Operating Systems: Three Easy Pieces in Rust.

Why do I want to port them to Rust?

1. I use it as a project to practice Rust. I got the opportunity to experiment with a wide variety of APIs in an OS.
2. It allows me to compare Rust to C so I get concrete information on which one is better for a particular situation.
3. This is a precursor for an experiment to write yet anther OS in Rust.

Whenever we have a choice between unsafe libc or safe Rust std, we always go with the safe one as that is what make Rust better. A few exceptions are:

1. intro/threads.rs: You need unsafe to demonstrate the synchronization problem. The safe Rust actually prevents such problem.
2. cpu-api.rs: We use libc to demonstrated fork().