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#![cfg_attr(feature = "nightly", feature(impl_trait_in_assoc_type))]
use std::boxed::Box;
use std::future::poll_fn;
use std::sync::{Arc, Mutex};
use std::task::Poll;
use embassy_executor::raw::Executor;
use embassy_executor::task;
#[export_name = "__pender"]
fn __pender(context: *mut ()) {
unsafe {
let trace = &*(context as *const Trace);
trace.push("pend");
}
}
#[derive(Clone)]
struct Trace {
trace: Arc<Mutex<Vec<&'static str>>>,
}
impl Trace {
fn new() -> Self {
Self {
trace: Arc::new(Mutex::new(Vec::new())),
}
}
fn push(&self, value: &'static str) {
self.trace.lock().unwrap().push(value)
}
fn get(&self) -> Vec<&'static str> {
self.trace.lock().unwrap().clone()
}
}
fn setup() -> (&'static Executor, Trace) {
let trace = Trace::new();
let context = Box::leak(Box::new(trace.clone())) as *mut _ as *mut ();
let executor = &*Box::leak(Box::new(Executor::new(context)));
(executor, trace)
}
#[test]
fn executor_noop() {
let (executor, trace) = setup();
unsafe { executor.poll() };
assert!(trace.get().is_empty())
}
#[test]
fn executor_task() {
#[task]
async fn task1(trace: Trace) {
trace.push("poll task1")
}
let (executor, trace) = setup();
executor.spawner().spawn(task1(trace.clone())).unwrap();
unsafe { executor.poll() };
unsafe { executor.poll() };
assert_eq!(
trace.get(),
&[
"pend", // spawning a task pends the executor
"poll task1", // poll only once.
]
)
}
#[test]
fn executor_task_self_wake() {
#[task]
async fn task1(trace: Trace) {
poll_fn(|cx| {
trace.push("poll task1");
cx.waker().wake_by_ref();
Poll::Pending
})
.await
}
let (executor, trace) = setup();
executor.spawner().spawn(task1(trace.clone())).unwrap();
unsafe { executor.poll() };
unsafe { executor.poll() };
assert_eq!(
trace.get(),
&[
"pend", // spawning a task pends the executor
"poll task1", //
"pend", // task self-wakes
"poll task1", //
"pend", // task self-wakes
]
)
}
#[test]
fn executor_task_self_wake_twice() {
#[task]
async fn task1(trace: Trace) {
poll_fn(|cx| {
trace.push("poll task1");
cx.waker().wake_by_ref();
trace.push("poll task1 wake 2");
cx.waker().wake_by_ref();
Poll::Pending
})
.await
}
let (executor, trace) = setup();
executor.spawner().spawn(task1(trace.clone())).unwrap();
unsafe { executor.poll() };
unsafe { executor.poll() };
assert_eq!(
trace.get(),
&[
"pend", // spawning a task pends the executor
"poll task1", //
"pend", // task self-wakes
"poll task1 wake 2", // task self-wakes again, shouldn't pend
"poll task1", //
"pend", // task self-wakes
"poll task1 wake 2", // task self-wakes again, shouldn't pend
]
)
}
#[test]
fn executor_task_cfg_args() {
// simulate cfg'ing away argument c
#[task]
async fn task1(a: u32, b: u32, #[cfg(any())] c: u32) {
let (_, _) = (a, b);
}
#[task]
async fn task2(a: u32, b: u32, #[cfg(all())] c: u32) {
let (_, _, _) = (a, b, c);
}
}
|
