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use base::Event;
use crate::AsyncError;
use crate::AsyncResult;
use crate::EventAsync;
use crate::Executor;
impl EventAsync {
pub fn new(event: Event, ex: &Executor) -> AsyncResult<EventAsync> {
ex.async_from(event)
.map(|io_source| EventAsync { io_source })
}
pub async fn next_val(&self) -> AsyncResult<u64> {
let (n, v) = self
.io_source
.read_to_vec(None, 0u64.to_ne_bytes().to_vec())
.await?;
if n != 8 {
return Err(AsyncError::EventAsync(base::Error::new(libc::ENODATA)));
}
Ok(u64::from_ne_bytes(v.try_into().unwrap()))
}
}
#[cfg(test)]
mod tests {
use std::sync::Arc;
use base::EventExt;
use super::super::fd_executor::EpollReactor;
use super::super::uring_executor::UringReactor;
use super::*;
use crate::common_executor::RawExecutor;
use crate::sys::unix::uring_executor::is_uring_stable;
pub(crate) fn new_poll(
event: Event,
ex: &Arc<RawExecutor<EpollReactor>>,
) -> AsyncResult<EventAsync> {
ex.new_source(event)
.map(|io_source| EventAsync { io_source })
}
pub(crate) fn new_uring(
event: Event,
ex: &Arc<RawExecutor<UringReactor>>,
) -> AsyncResult<EventAsync> {
ex.new_source(event)
.map(|io_source| EventAsync { io_source })
}
#[test]
fn next_val_reads_value() {
async fn go(event: Event, ex: &Executor) -> u64 {
let event_async = EventAsync::new(event, ex).unwrap();
event_async.next_val().await.unwrap()
}
let eventfd = Event::new().unwrap();
eventfd.write_count(0xaa).unwrap();
let ex = Executor::new().unwrap();
let val = ex.run_until(go(eventfd, &ex)).unwrap();
assert_eq!(val, 0xaa);
}
#[test]
fn next_val_reads_value_poll_and_ring() {
if !is_uring_stable() {
return;
}
async fn go(event_async: EventAsync) -> u64 {
event_async.next_val().await.unwrap()
}
let eventfd = Event::new().unwrap();
eventfd.write_count(0xaa).unwrap();
let uring_ex = RawExecutor::<UringReactor>::new().unwrap();
let val = uring_ex
.run_until(go(new_uring(eventfd, &uring_ex).unwrap()))
.unwrap();
assert_eq!(val, 0xaa);
let eventfd = Event::new().unwrap();
eventfd.write_count(0xaa).unwrap();
let poll_ex = RawExecutor::<EpollReactor>::new().unwrap();
let val = poll_ex
.run_until(go(new_poll(eventfd, &poll_ex).unwrap()))
.unwrap();
assert_eq!(val, 0xaa);
}
}