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#![allow(unknown_lints, unexpected_cfgs)]
#![cfg(tokio_unstable)]
use std::sync::{atomic::AtomicUsize, Arc, Mutex};
use tokio::task::yield_now;
#[cfg(not(target_os = "wasi"))]
#[test]
fn callbacks_fire_multi_thread() {
let poll_start_counter = Arc::new(AtomicUsize::new(0));
let poll_stop_counter = Arc::new(AtomicUsize::new(0));
let poll_start = poll_start_counter.clone();
let poll_stop = poll_stop_counter.clone();
let before_task_poll_callback_task_id: Arc<Mutex<Option<tokio::task::Id>>> =
Arc::new(Mutex::new(None));
let after_task_poll_callback_task_id: Arc<Mutex<Option<tokio::task::Id>>> =
Arc::new(Mutex::new(None));
let before_task_poll_callback_task_id_ref = Arc::clone(&before_task_poll_callback_task_id);
let after_task_poll_callback_task_id_ref = Arc::clone(&after_task_poll_callback_task_id);
let rt = tokio::runtime::Builder::new_multi_thread()
.enable_all()
.on_before_task_poll(move |task_meta| {
before_task_poll_callback_task_id_ref
.lock()
.unwrap()
.replace(task_meta.id());
poll_start_counter.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
})
.on_after_task_poll(move |task_meta| {
after_task_poll_callback_task_id_ref
.lock()
.unwrap()
.replace(task_meta.id());
poll_stop_counter.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
})
.build()
.unwrap();
let task = rt.spawn(async {
yield_now().await;
yield_now().await;
yield_now().await;
});
let spawned_task_id = task.id();
rt.block_on(task).expect("task should succeed");
// We need to drop the runtime to guarantee the workers have exited (and thus called the callback)
drop(rt);
assert_eq!(
before_task_poll_callback_task_id.lock().unwrap().unwrap(),
spawned_task_id
);
assert_eq!(
after_task_poll_callback_task_id.lock().unwrap().unwrap(),
spawned_task_id
);
let actual_count = 4;
assert_eq!(
poll_start.load(std::sync::atomic::Ordering::Relaxed),
actual_count,
"unexpected number of poll starts"
);
assert_eq!(
poll_stop.load(std::sync::atomic::Ordering::Relaxed),
actual_count,
"unexpected number of poll stops"
);
}
#[test]
fn callbacks_fire_current_thread() {
let poll_start_counter = Arc::new(AtomicUsize::new(0));
let poll_stop_counter = Arc::new(AtomicUsize::new(0));
let poll_start = poll_start_counter.clone();
let poll_stop = poll_stop_counter.clone();
let before_task_poll_callback_task_id: Arc<Mutex<Option<tokio::task::Id>>> =
Arc::new(Mutex::new(None));
let after_task_poll_callback_task_id: Arc<Mutex<Option<tokio::task::Id>>> =
Arc::new(Mutex::new(None));
let before_task_poll_callback_task_id_ref = Arc::clone(&before_task_poll_callback_task_id);
let after_task_poll_callback_task_id_ref = Arc::clone(&after_task_poll_callback_task_id);
let rt = tokio::runtime::Builder::new_current_thread()
.enable_all()
.on_before_task_poll(move |task_meta| {
before_task_poll_callback_task_id_ref
.lock()
.unwrap()
.replace(task_meta.id());
poll_start_counter.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
})
.on_after_task_poll(move |task_meta| {
after_task_poll_callback_task_id_ref
.lock()
.unwrap()
.replace(task_meta.id());
poll_stop_counter.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
})
.build()
.unwrap();
let task = rt.spawn(async {
yield_now().await;
yield_now().await;
yield_now().await;
});
let spawned_task_id = task.id();
let _ = rt.block_on(task);
drop(rt);
assert_eq!(
before_task_poll_callback_task_id.lock().unwrap().unwrap(),
spawned_task_id
);
assert_eq!(
after_task_poll_callback_task_id.lock().unwrap().unwrap(),
spawned_task_id
);
assert_eq!(poll_start.load(std::sync::atomic::Ordering::Relaxed), 4);
assert_eq!(poll_stop.load(std::sync::atomic::Ordering::Relaxed), 4);
}