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

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

// 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();
    assert_eq!(m, i.to_string());
}

} '''