#[cfg(unix)]
pub fn get_resident() -> Option<usize> {
use std::fs::File;
use std::io::Read;
let field = 1;
let mut f = File::open("/proc/self/statm").ok()?;
let mut contents = String::new();
f.read_to_string(&mut contents).ok()?;
let s = contents.split_whitespace().nth(field)?;
let npages = s.parse::<usize>().ok()?;
Some(npages * 4096)
}
#[cfg(not(unix))]
pub fn get_resident() -> Option<usize> {
None
}