optimistic_lock_coupling 0.2.5

use optimistic_lock_coupling::*;
fn main() {
    let i = 10000;
    static mut lock: Option<OptimisticLockCoupling<i32>> = None;
    unsafe { lock = Some(OptimisticLockCoupling::from(0)) };
    let write_fn = move || unsafe {
        for _i in 0..i {
            // std::thread::sleep_ms(10);
            loop {
                match lock.as_ref().unwrap().write() {
                    Ok(mut guard) => {
                        *guard += 1;
                        break;
                    }
                    Err(_err) => {
                        continue;
                    }
                }
            }
        }
    };
    let read_fn = move || unsafe {
        for _i in 0..i {
            while let Ok(_) = lock.as_ref().unwrap().read_txn(
                #[inline(always)]
                |guard| {
                    println!("{}", guard);
                    Ok(())
                },
            ) {
                break;
            }
        }
    };
    use std::thread::spawn;
    let thread1 = spawn(write_fn);
    let thread2 = spawn(read_fn);

    let _ = thread1.join();
    let _ = thread2.join();
    unsafe { assert_eq!(*(lock.as_ref().unwrap().write().unwrap()), i) }
}