The current APIs are nearly stable.

Remaining questions:

• rlimit will not add cgroups API. cgroups-rs is recommanded now.
• Is it ok to use u64 as the rlim type for all platforms? (Yes)
• The signature of rlimit::prlimit seems sightly strange. Is there a better way? (Keep it)
• setmaxstdio(u32::MAX) can lead to crash. Should it be a feature or a bug?
  • Fix setmaxstdio crash on Windows with values exceeding c_int::MAX #75

Related issues:

• RLIM_* constants mismatch with system header files rust-lang/libc#2724