Hello.
I looking the best way to code in Rust this:
https://wiki.linuxfoundation.org/realtime/documentation/howto/applications/application_base
What library is best to use for this (setting scheduling, pthreads...etc.) ?
For C function mlockall I can use nix library
Most pthread-related functions, types and constants are defined in the libc crate. You can quite easily define the missing ones yourself. Read up on FFI (Rust by Example provides a brief but perfectly adequate overview if you're in a hurry). The only unintuitive part is dealing with C-style initialization of a pthread_attr_t typed variable—these days it's done with std::mem::MaybeUninit.