You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: lib.rs
    path of file: ./repos/Theseus/applications/heap_eval/src
    
    the code of the file until where you have to start completion: #![no_std]

extern crate alloc;
#[macro_use] extern crate app_io;
#[macro_use] extern crate log;
extern crate hpet;
extern crate hashbrown;
extern crate qp_trie;
extern crate apic;
extern crate libtest;
extern crate spawn;
extern crate cpu;
extern crate getopts;
extern crate heap;

use alloc::{
    string::{String, ToString},
    vec::Vec,
    collections::{BTreeSet,
    
pub fn main(args: Vec<String>) -> isize {
    let mut opts = Options::new();
    opts.optflag("h", "help", "print this help menu");
    opts.optopt("t", "threads", "total number of worker threads to spawn across all cores for threadtest or shbench", "THREADS");
    opts.optopt("i", "iterations", "number of iterations to run for threadtest or shbench", "ITERATIONS");
    opts.optopt("o", "objects", "total number of objects to be allocated by all threads in threadtest", "OBJECTS");

    opts.optflag("", "vector", "run the test with a vector as the heap based data structure");
    opts.optflag("", "hashmap", "run the test with a hashmap as the heap based data structure");
    opts.optflag("", "btreemap", "run the test with a btreemap as the heap based data structure");
    opts.optflag("", "btreeset", "run the test with a btreeset as the heap based data structure");
    opts.optflag("", "qptrie", "run the test with a qp-trie as the heap based data structure");
    opts.optflag("", "threadtest", "run the threadtest heap benchmark");
    opts.optflag("", "shbench", "run the shbench heap benchmark");
    opts.optflag("", "large", "run threadtest or shbench for large allocations");


    
    let matches = match opts.parse(args) {
        Ok(m) => m,
        Err(_f) => {
            println!("{}", _f);
            print_usage(opts);
            return -1; 
        }
    };

    if matches.opt_present("h") {
        print_usage(opts);
        return 0;
    }

    if let Some(threads) = matches.opt_str("t").and_then(|i| i.parse::<usize>().ok()) {
        NTHREADS.store(threads, Ordering::SeqCst);
    }

	if !check_myrq() {
		println!("cannot run on a busy CPU (#{}). Pin me on an idle CPU.", cpu::current_cpu());
		return 0;
	}

    match rmain(matches) {
        Ok(_) => 0,
        Err(e) => {
            print_usage(opts);
            println!("Error: {}", e);
            -1
        }    
    } 
}