On Disk Ringbuffer

This is an extremely simple implementation of an on disk write-only log that sort of pretends to be a ringbuffer! It uses memory-mapped pages to have interprocess, lock-free, reads and writes. It's blazingly fast, but tends to hog disk-space for better efficiency (less but bigger memory-mapped pages).

Example

fn seq_test() {
    // takes directory to use as ringbuf storage as input
    let (mut tx, mut rx) = new("test-seq").unwrap();

    // you can clone readers and writers to use in other threads!
    let tx2 = tx.clone();

    for i in 0..50_000_000 {
        tx.push(i.to_string());
    }

    for i in 0..50_000_000 {
        let m = rx.pop().unwrap().unwrap();
        assert_eq!(m, i.to_string());
    }
}