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#![doc = include_str!("../README.md")]
#![warn(missing_docs)]
#![warn(rustdoc::missing_crate_level_docs)]
mod mpmcpq;
pub use self::mpmcpq::PriorityQueue;
mod message;
pub use message::Message;
mod guard;
pub use guard::ReceiveGuard;
mod stash;
pub use stash::Stash;
#[cfg(test)]
mod tests {
use std::{thread, time};
use std::sync::Arc;
use std::sync::atomic::{AtomicU64, Ordering};
use std::io::Write;
use std::sync::Once;
#[allow(unused_imports)]
pub use log::{debug, error, info, trace, warn};
use env_logger;
use super::{Message, PriorityQueue, Stash};
pub fn init_env_logging() {
static LOGGER: Once = Once::new();
LOGGER.call_once(|| {
let counter: AtomicU64 = AtomicU64::new(0);
let seq_num = move || counter.fetch_add(1, Ordering::Relaxed);
let start = time::Instant::now();
env_logger::Builder::from_default_env()
.format(move |buf, record| {
let micros = start.elapsed().as_micros() as u64;
writeln!(
buf,
"{:0>12}: {:0>8}.{:0>6}: {:>5}: {}:{}: {}: {}",
seq_num(),
micros / 1000000,
micros % 1000000,
record.level().as_str(),
record.file().unwrap_or(""),
record.line().unwrap_or(0),
thread::current().name().unwrap_or("UNKNOWN"),
record.args()
)
})
.try_init()
.unwrap();
});
}
#[test]
fn smoke() {
init_env_logging();
let queue: PriorityQueue<String, u64> = PriorityQueue::new();
let mut stash = Stash::<String, u64>::new(&queue);
queue.send("test 1".to_string(), 1, &mut stash);
queue.send("test 3".to_string(), 3, &mut stash);
queue.send("test 2".to_string(), 2, &mut stash);
assert_eq!(
queue.recv_guard().message(),
&Message::Msg("test 1".to_string(), 1)
);
assert_eq!(
queue.recv_guard().message(),
&Message::Msg("test 2".to_string(), 2)
);
assert_eq!(
queue.recv_guard().message(),
&Message::Msg("test 3".to_string(), 3)
);
assert_eq!(queue.recv_guard().message(), &Message::Drained);
assert!(queue.try_recv_guard().is_none());
}
#[test]
fn try_recv() {
init_env_logging();
let queue: PriorityQueue<String, u64> = PriorityQueue::new();
let mut stash = Stash::<String, u64>::new(&queue);
queue.send("test 1".to_string(), 1, &mut stash);
queue.send("test 3".to_string(), 3, &mut stash);
queue.send("test 2".to_string(), 2, &mut stash);
assert!(queue.try_recv_guard().is_some());
assert!(queue.try_recv_guard().is_some());
assert!(queue.try_recv_guard().is_some());
assert!(queue.try_recv_guard().is_some());
assert!(queue.try_recv_guard().is_none());
assert!(queue.try_recv_guard().is_none());
}
#[test]
fn threads() {
init_env_logging();
let queue: Arc<PriorityQueue<String, u64>> = Arc::new(PriorityQueue::new());
let thread1_queue = queue.clone();
let thread1 = thread::spawn(move || {
let mut stash1 = Stash::<String, u64>::new(&thread1_queue);
thread1_queue.send("test 1".to_string(), 1, &mut stash1);
thread1_queue.send("test 3".to_string(), 3, &mut stash1);
thread1_queue.send("test 2".to_string(), 2, &mut stash1);
});
thread1.join().unwrap();
let thread2_queue = queue.clone();
let thread2 = thread::spawn(move || {
let mut stash2 = Stash::<String, u64>::new(&thread2_queue);
assert_eq!(
thread2_queue.recv_guard().message(),
&Message::Msg("test 1".to_string(), 1)
);
assert_eq!(
thread2_queue.recv_guard().message(),
&Message::Msg("test 2".to_string(), 2)
);
assert_eq!(
thread2_queue.recv_guard().message(),
&Message::Msg("test 3".to_string(), 3)
);
assert!(thread2_queue.recv_guard().message().is_drained());
assert!(thread2_queue.try_recv_guard().is_none());
thread2_queue.send("test 4".to_string(), 4, &mut stash2);
assert_eq!(
thread2_queue.recv_guard().message(),
&Message::Msg("test 4".to_string(), 4)
);
assert!(thread2_queue.recv_guard().message().is_drained());
assert!(thread2_queue.try_recv_guard().is_none());
});
thread2.join().unwrap();
}
}