You aren't likely to need to change a lot of these: the whole point is basically making it so that all that can run as normal but won't really get in the way of

You aren't likely to need to change a lot of these: the whole point is basically making it so that all that can run as normal but won't really get in the way of your high-priority process. It's just that your high-priority process needs to be careful not to block on anything that might take too long due to some other stuff running. In which case you may need to avoid certain C standard library calls, but not replace it entirely.