Function parse_single_value 

pub fn parse_single_value(file_path: &Path) -> Result<u64, WrappedIoError>

Parses a single valued file to an u64

Example

use std::path::Path;
use libcgroups::stats::parse_single_value;

let value = parse_single_value(&Path::new("memory.current")).unwrap();
assert_eq!(value, 32);