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Merge pull request #1763 from rubdos/sender-receiver-with-ctx

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Refactor Channel/Sender/Receiver poll methods
This commit is contained in:
Dario Nieuwenhuis 2023-08-22 21:25:29 +00:00 committed by GitHub
commit b3212ae383
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GPG key ID: 4AEE18F83AFDEB23
14 changed files with 160 additions and 83 deletions
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10
embassy-stm32-wpan/src/mac/driver.rs
View file

@ -28,7 +28,9 @@ impl<'d> embassy_net_driver::Driver for Driver<'d> {
type TxToken<'a> = TxToken<'d> where Self: 'a;
fn receive(&mut self, cx: &mut Context) -> Option<(Self::RxToken<'_>, Self::TxToken<'_>)> {
if self.runner.rx_channel.poll_ready_to_receive(cx) && self.runner.tx_buf_channel.poll_ready_to_receive(cx) {
if self.runner.rx_channel.poll_ready_to_receive(cx).is_ready()
&& self.runner.tx_buf_channel.poll_ready_to_receive(cx).is_ready()
{
Some((
RxToken {
rx: &self.runner.rx_channel,
@ -44,7 +46,7 @@ impl<'d> embassy_net_driver::Driver for Driver<'d> {
}
fn transmit(&mut self, cx: &mut Context) -> Option<Self::TxToken<'_>> {
if self.runner.tx_buf_channel.poll_ready_to_receive(cx) {
if self.runner.tx_buf_channel.poll_ready_to_receive(cx).is_ready() {
Some(TxToken {
tx: &self.runner.tx_channel,
tx_buf: &self.runner.tx_buf_channel,
@ -91,7 +93,7 @@ impl<'d> embassy_net_driver::RxToken for RxToken<'d> {
{
// Only valid data events should be put into the queue
let data_event = match self.rx.try_recv().unwrap() {
let data_event = match self.rx.try_receive().unwrap() {
MacEvent::McpsDataInd(data_event) => data_event,
_ => unreachable!(),
};
@ -111,7 +113,7 @@ impl<'d> embassy_net_driver::TxToken for TxToken<'d> {
F: FnOnce(&mut [u8]) -> R,
{
// Only valid tx buffers should be put into the queue
let buf = self.tx_buf.try_recv().unwrap();
let buf = self.tx_buf.try_receive().unwrap();
let r = f(&mut buf[..len]);
// The tx channel should always be of equal capacity to the tx_buf channel

2
embassy-stm32-wpan/src/mac/runner.rs
View file

@ -73,7 +73,7 @@ impl<'a> Runner<'a> {
let mut msdu_handle = 0x02;
loop {
let (buf, len) = self.tx_channel.recv().await;
let (buf, len) = self.tx_channel.receive().await;
let _wm = self.write_mutex.lock().await;
// The mutex should be dropped on the next loop iteration

13
embassy-stm32/src/can/bxcan.rs
View file

@ -478,7 +478,7 @@ impl<'c, 'd, T: Instance> CanRx<'c, 'd, T> {
pub async fn read(&mut self) -> Result<Envelope, BusError> {
poll_fn(|cx| {
T::state().err_waker.register(cx.waker());
if let Poll::Ready(envelope) = T::state().rx_queue.recv().poll_unpin(cx) {
if let Poll::Ready(envelope) = T::state().rx_queue.receive().poll_unpin(cx) {
return Poll::Ready(Ok(envelope));
} else if let Some(err) = self.curr_error() {
return Poll::Ready(Err(err));
@ -493,7 +493,7 @@ impl<'c, 'd, T: Instance> CanRx<'c, 'd, T> {
///
/// Returns [Err(TryReadError::Empty)] if there are no frames in the rx queue.
pub fn try_read(&mut self) -> Result<Envelope, TryReadError> {
if let Ok(envelope) = T::state().rx_queue.try_recv() {
if let Ok(envelope) = T::state().rx_queue.try_receive() {
return Ok(envelope);
}
@ -506,14 +506,7 @@ impl<'c, 'd, T: Instance> CanRx<'c, 'd, T> {
/// Waits while receive queue is empty.
pub async fn wait_not_empty(&mut self) {
poll_fn(|cx| {
if T::state().rx_queue.poll_ready_to_receive(cx) {
Poll::Ready(())
} else {
Poll::Pending
}
})
.await
poll_fn(|cx| T::state().rx_queue.poll_ready_to_receive(cx)).await
}
fn curr_error(&self) -> Option<BusError> {

190
embassy-sync/src/channel.rs
View file

@ -65,6 +65,13 @@ where
pub fn try_send(&self, message: T) -> Result<(), TrySendError<T>> {
self.channel.try_send(message)
}
/// Allows a poll_fn to poll until the channel is ready to send
///
/// See [`Channel::poll_ready_to_send()`]
pub fn poll_ready_to_send(&self, cx: &mut Context<'_>) -> Poll<()> {
self.channel.poll_ready_to_send(cx)
}
}
/// Send-only access to a [`Channel`] without knowing channel size.
@ -106,6 +113,13 @@ impl<'ch, T> DynamicSender<'ch, T> {
pub fn try_send(&self, message: T) -> Result<(), TrySendError<T>> {
self.channel.try_send_with_context(message, None)
}
/// Allows a poll_fn to poll until the channel is ready to send
///
/// See [`Channel::poll_ready_to_send()`]
pub fn poll_ready_to_send(&self, cx: &mut Context<'_>) -> Poll<()> {
self.channel.poll_ready_to_send(cx)
}
}
/// Receive-only access to a [`Channel`].
@ -133,16 +147,30 @@ where
{
/// Receive the next value.
///
/// See [`Channel::recv()`].
pub fn recv(&self) -> RecvFuture<'_, M, T, N> {
self.channel.recv()
/// See [`Channel::receive()`].
pub fn receive(&self) -> ReceiveFuture<'_, M, T, N> {
self.channel.receive()
}
/// Attempt to immediately receive the next value.
///
/// See [`Channel::try_recv()`]
pub fn try_recv(&self) -> Result<T, TryRecvError> {
self.channel.try_recv()
/// See [`Channel::try_receive()`]
pub fn try_receive(&self) -> Result<T, TryReceiveError> {
self.channel.try_receive()
}
/// Allows a poll_fn to poll until the channel is ready to receive
///
/// See [`Channel::poll_ready_to_receive()`]
pub fn poll_ready_to_receive(&self, cx: &mut Context<'_>) -> Poll<()> {
self.channel.poll_ready_to_receive(cx)
}
/// Poll the channel for the next item
///
/// See [`Channel::poll_receive()`]
pub fn poll_receive(&self, cx: &mut Context<'_>) -> Poll<T> {
self.channel.poll_receive(cx)
}
}
@ -162,16 +190,30 @@ impl<'ch, T> Copy for DynamicReceiver<'ch, T> {}
impl<'ch, T> DynamicReceiver<'ch, T> {
/// Receive the next value.
///
/// See [`Channel::recv()`].
pub fn recv(&self) -> DynamicRecvFuture<'_, T> {
DynamicRecvFuture { channel: self.channel }
/// See [`Channel::receive()`].
pub fn receive(&self) -> DynamicReceiveFuture<'_, T> {
DynamicReceiveFuture { channel: self.channel }
}
/// Attempt to immediately receive the next value.
///
/// See [`Channel::try_recv()`]
pub fn try_recv(&self) -> Result<T, TryRecvError> {
self.channel.try_recv_with_context(None)
/// See [`Channel::try_receive()`]
pub fn try_receive(&self) -> Result<T, TryReceiveError> {
self.channel.try_receive_with_context(None)
}
/// Allows a poll_fn to poll until the channel is ready to receive
///
/// See [`Channel::poll_ready_to_receive()`]
pub fn poll_ready_to_receive(&self, cx: &mut Context<'_>) -> Poll<()> {
self.channel.poll_ready_to_receive(cx)
}
/// Poll the channel for the next item
///
/// See [`Channel::poll_receive()`]
pub fn poll_receive(&self, cx: &mut Context<'_>) -> Poll<T> {
self.channel.poll_receive(cx)
}
}
@ -184,42 +226,39 @@ where
}
}
/// Future returned by [`Channel::recv`] and [`Receiver::recv`].
/// Future returned by [`Channel::receive`] and [`Receiver::receive`].
#[must_use = "futures do nothing unless you `.await` or poll them"]
pub struct RecvFuture<'ch, M, T, const N: usize>
pub struct ReceiveFuture<'ch, M, T, const N: usize>
where
M: RawMutex,
{
channel: &'ch Channel<M, T, N>,
}
impl<'ch, M, T, const N: usize> Future for RecvFuture<'ch, M, T, N>
impl<'ch, M, T, const N: usize> Future for ReceiveFuture<'ch, M, T, N>
where
M: RawMutex,
{
type Output = T;
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<T> {
match self.channel.try_recv_with_context(Some(cx)) {
Ok(v) => Poll::Ready(v),
Err(TryRecvError::Empty) => Poll::Pending,
}
self.channel.poll_receive(cx)
}
}
/// Future returned by [`DynamicReceiver::recv`].
/// Future returned by [`DynamicReceiver::receive`].
#[must_use = "futures do nothing unless you `.await` or poll them"]
pub struct DynamicRecvFuture<'ch, T> {
pub struct DynamicReceiveFuture<'ch, T> {
channel: &'ch dyn DynamicChannel<T>,
}
impl<'ch, T> Future for DynamicRecvFuture<'ch, T> {
impl<'ch, T> Future for DynamicReceiveFuture<'ch, T> {
type Output = T;
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<T> {
match self.channel.try_recv_with_context(Some(cx)) {
match self.channel.try_receive_with_context(Some(cx)) {
Ok(v) => Poll::Ready(v),
Err(TryRecvError::Empty) => Poll::Pending,
Err(TryReceiveError::Empty) => Poll::Pending,
}
}
}
@ -285,13 +324,18 @@ impl<'ch, T> Unpin for DynamicSendFuture<'ch, T> {}
trait DynamicChannel<T> {
fn try_send_with_context(&self, message: T, cx: Option<&mut Context<'_>>) -> Result<(), TrySendError<T>>;
fn try_recv_with_context(&self, cx: Option<&mut Context<'_>>) -> Result<T, TryRecvError>;
fn try_receive_with_context(&self, cx: Option<&mut Context<'_>>) -> Result<T, TryReceiveError>;
fn poll_ready_to_send(&self, cx: &mut Context<'_>) -> Poll<()>;
fn poll_ready_to_receive(&self, cx: &mut Context<'_>) -> Poll<()>;
fn poll_receive(&self, cx: &mut Context<'_>) -> Poll<T>;
}
/// Error returned by [`try_recv`](Channel::try_recv).
/// Error returned by [`try_receive`](Channel::try_receive).
#[derive(PartialEq, Eq, Clone, Copy, Debug)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum TryRecvError {
pub enum TryReceiveError {
/// A message could not be received because the channel is empty.
Empty,
}
@ -320,11 +364,11 @@ impl<T, const N: usize> ChannelState<T, N> {
}
}
fn try_recv(&mut self) -> Result<T, TryRecvError> {
self.try_recv_with_context(None)
fn try_receive(&mut self) -> Result<T, TryReceiveError> {
self.try_receive_with_context(None)
}
fn try_recv_with_context(&mut self, cx: Option<&mut Context<'_>>) -> Result<T, TryRecvError> {
fn try_receive_with_context(&mut self, cx: Option<&mut Context<'_>>) -> Result<T, TryReceiveError> {
if self.queue.is_full() {
self.senders_waker.wake();
}
@ -335,14 +379,31 @@ impl<T, const N: usize> ChannelState<T, N> {
if let Some(cx) = cx {
self.receiver_waker.register(cx.waker());
}
Err(TryRecvError::Empty)
Err(TryReceiveError::Empty)
}
}
fn poll_ready_to_receive(&mut self, cx: &mut Context<'_>) -> bool {
fn poll_receive(&mut self, cx: &mut Context<'_>) -> Poll<T> {
if self.queue.is_full() {
self.senders_waker.wake();
}
if let Some(message) = self.queue.pop_front() {
Poll::Ready(message)
} else {
self.receiver_waker.register(cx.waker());
Poll::Pending
}
}
fn poll_ready_to_receive(&mut self, cx: &mut Context<'_>) -> Poll<()> {
self.receiver_waker.register(cx.waker());
!self.queue.is_empty()
if !self.queue.is_empty() {
Poll::Ready(())
} else {
Poll::Pending
}
}
fn try_send(&mut self, message: T) -> Result<(), TrySendError<T>> {
@ -364,10 +425,14 @@ impl<T, const N: usize> ChannelState<T, N> {
}
}
fn poll_ready_to_send(&mut self, cx: &mut Context<'_>) -> bool {
fn poll_ready_to_send(&mut self, cx: &mut Context<'_>) -> Poll<()> {
self.senders_waker.register(cx.waker());
!self.queue.is_full()
if !self.queue.is_full() {
Poll::Ready(())
} else {
Poll::Pending
}
}
}
@ -409,8 +474,13 @@ where
self.inner.lock(|rc| f(&mut *rc.borrow_mut()))
}
fn try_recv_with_context(&self, cx: Option<&mut Context<'_>>) -> Result<T, TryRecvError> {
self.lock(|c| c.try_recv_with_context(cx))
fn try_receive_with_context(&self, cx: Option<&mut Context<'_>>) -> Result<T, TryReceiveError> {
self.lock(|c| c.try_receive_with_context(cx))
}
/// Poll the channel for the next message
pub fn poll_receive(&self, cx: &mut Context<'_>) -> Poll<T> {
self.lock(|c| c.poll_receive(cx))
}
fn try_send_with_context(&self, m: T, cx: Option<&mut Context<'_>>) -> Result<(), TrySendError<T>> {
@ -418,12 +488,12 @@ where
}
/// Allows a poll_fn to poll until the channel is ready to receive
pub fn poll_ready_to_receive(&self, cx: &mut Context<'_>) -> bool {
pub fn poll_ready_to_receive(&self, cx: &mut Context<'_>) -> Poll<()> {
self.lock(|c| c.poll_ready_to_receive(cx))
}
/// Allows a poll_fn to poll until the channel is ready to send
pub fn poll_ready_to_send(&self, cx: &mut Context<'_>) -> bool {
pub fn poll_ready_to_send(&self, cx: &mut Context<'_>) -> Poll<()> {
self.lock(|c| c.poll_ready_to_send(cx))
}
@ -466,16 +536,16 @@ where
///
/// If there are no messages in the channel's buffer, this method will
/// wait until a message is sent.
pub fn recv(&self) -> RecvFuture<'_, M, T, N> {
RecvFuture { channel: self }
pub fn receive(&self) -> ReceiveFuture<'_, M, T, N> {
ReceiveFuture { channel: self }
}
/// Attempt to immediately receive a message.
///
/// This method will either receive a message from the channel immediately or return an error
/// if the channel is empty.
pub fn try_recv(&self) -> Result<T, TryRecvError> {
self.lock(|c| c.try_recv())
pub fn try_receive(&self) -> Result<T, TryReceiveError> {
self.lock(|c| c.try_receive())
}
}
@ -489,8 +559,20 @@ where
Channel::try_send_with_context(self, m, cx)
}
fn try_recv_with_context(&self, cx: Option<&mut Context<'_>>) -> Result<T, TryRecvError> {
Channel::try_recv_with_context(self, cx)
fn try_receive_with_context(&self, cx: Option<&mut Context<'_>>) -> Result<T, TryReceiveError> {
Channel::try_receive_with_context(self, cx)
}
fn poll_ready_to_send(&self, cx: &mut Context<'_>) -> Poll<()> {
Channel::poll_ready_to_send(self, cx)
}
fn poll_ready_to_receive(&self, cx: &mut Context<'_>) -> Poll<()> {
Channel::poll_ready_to_receive(self, cx)
}
fn poll_receive(&self, cx: &mut Context<'_>) -> Poll<T> {
Channel::poll_receive(self, cx)
}
}
@ -534,15 +616,15 @@ mod tests {
fn receiving_once_with_one_send() {
let mut c = ChannelState::<u32, 3>::new();
assert!(c.try_send(1).is_ok());
assert_eq!(c.try_recv().unwrap(), 1);
assert_eq!(c.try_receive().unwrap(), 1);
assert_eq!(capacity(&c), 3);
}
#[test]
fn receiving_when_empty() {
let mut c = ChannelState::<u32, 3>::new();
match c.try_recv() {
Err(TryRecvError::Empty) => assert!(true),
match c.try_receive() {
Err(TryReceiveError::Empty) => assert!(true),
_ => assert!(false),
}
assert_eq!(capacity(&c), 3);
@ -552,7 +634,7 @@ mod tests {
fn simple_send_and_receive() {
let c = Channel::<NoopRawMutex, u32, 3>::new();
assert!(c.try_send(1).is_ok());
assert_eq!(c.try_recv().unwrap(), 1);
assert_eq!(c.try_receive().unwrap(), 1);
}
#[test]
@ -572,7 +654,7 @@ mod tests {
let r: DynamicReceiver<'_, u32> = c.receiver().into();
assert!(s.try_send(1).is_ok());
assert_eq!(r.try_recv().unwrap(), 1);
assert_eq!(r.try_receive().unwrap(), 1);
}
#[futures_test::test]
@ -587,14 +669,14 @@ mod tests {
assert!(c2.try_send(1).is_ok());
})
.is_ok());
assert_eq!(c.recv().await, 1);
assert_eq!(c.receive().await, 1);
}
#[futures_test::test]
async fn sender_send_completes_if_capacity() {
let c = Channel::<CriticalSectionRawMutex, u32, 1>::new();
c.send(1).await;
assert_eq!(c.recv().await, 1);
assert_eq!(c.receive().await, 1);
}
#[futures_test::test]
@ -612,11 +694,11 @@ mod tests {
// Wish I could think of a means of determining that the async send is waiting instead.
// However, I've used the debugger to observe that the send does indeed wait.
Delay::new(Duration::from_millis(500)).await;
assert_eq!(c.recv().await, 1);
assert_eq!(c.receive().await, 1);
assert!(executor
.spawn(async move {
loop {
c.recv().await;
c.receive().await;
}
})
.is_ok());

2
examples/nrf52840/src/bin/channel.rs
View file

@ -35,7 +35,7 @@ async fn main(spawner: Spawner) {
unwrap!(spawner.spawn(my_task()));
loop {
match CHANNEL.recv().await {
match CHANNEL.receive().await {
LedState::On => led.set_high(),
LedState::Off => led.set_low(),
}

2
examples/nrf52840/src/bin/channel_sender_receiver.rs
View file

@ -33,7 +33,7 @@ async fn recv_task(led: AnyPin, receiver: Receiver<'static, NoopRawMutex, LedSta
let mut led = Output::new(led, Level::Low, OutputDrive::Standard);
loop {
match receiver.recv().await {
match receiver.receive().await {
LedState::On => led.set_high(),
LedState::Off => led.set_low(),
}

2
examples/nrf52840/src/bin/uart_split.rs
View file

@ -46,7 +46,7 @@ async fn main(spawner: Spawner) {
// back out the buffer we receive from the read
// task.
loop {
let buf = CHANNEL.recv().await;
let buf = CHANNEL.receive().await;
info!("writing...");
unwrap!(tx.write(&buf).await);
}

2
examples/rp/src/bin/lora_p2p_send_multicore.rs
View file

@ -113,7 +113,7 @@ async fn core1_task(
};
loop {
let buffer: [u8; 3] = CHANNEL.recv().await;
let buffer: [u8; 3] = CHANNEL.receive().await;
match lora.prepare_for_tx(&mdltn_params, 20, false).await {
Ok(()) => {}
Err(err) => {

2
examples/rp/src/bin/multicore.rs
View file

@ -56,7 +56,7 @@ async fn core0_task() {
async fn core1_task(mut led: Output<'static, PIN_25>) {
info!("Hello from core 1");
loop {
match CHANNEL.recv().await {
match CHANNEL.receive().await {
LedState::On => led.set_high(),
LedState::Off => led.set_low(),
}

4
examples/stm32f3/src/bin/button_events.rs
View file

@ -49,12 +49,12 @@ impl<'a> Leds<'a> {
async fn show(&mut self) {
self.leds[self.current_led].set_high();
if let Ok(new_message) = with_timeout(Duration::from_millis(500), CHANNEL.recv()).await {
if let Ok(new_message) = with_timeout(Duration::from_millis(500), CHANNEL.receive()).await {
self.leds[self.current_led].set_low();
self.process_event(new_message).await;
} else {
self.leds[self.current_led].set_low();
if let Ok(new_message) = with_timeout(Duration::from_millis(200), CHANNEL.recv()).await {
if let Ok(new_message) = with_timeout(Duration::from_millis(200), CHANNEL.receive()).await {
self.process_event(new_message).await;
}
}

2
examples/stm32h5/src/bin/usart_split.rs
View file

@ -44,7 +44,7 @@ async fn main(spawner: Spawner) -> ! {
unwrap!(spawner.spawn(reader(rx)));
loop {
let buf = CHANNEL.recv().await;
let buf = CHANNEL.receive().await;
info!("writing...");
unwrap!(tx.write(&buf).await);
}

2
examples/stm32h7/src/bin/usart_split.rs
View file

@ -44,7 +44,7 @@ async fn main(spawner: Spawner) -> ! {
unwrap!(spawner.spawn(reader(rx)));
loop {
let buf = CHANNEL.recv().await;
let buf = CHANNEL.receive().await;
info!("writing...");
unwrap!(tx.write(&buf).await);
}

6
tests/rp/src/bin/gpio_multicore.rs
View file

@ -37,11 +37,11 @@ async fn core0_task(p: PIN_0) {
let mut pin = Output::new(p, Level::Low);
CHANNEL0.send(()).await;
CHANNEL1.recv().await;
CHANNEL1.receive().await;
pin.set_high();
CHANNEL1.recv().await;
CHANNEL1.receive().await;
info!("Test OK");
cortex_m::asm::bkpt();
@ -51,7 +51,7 @@ async fn core0_task(p: PIN_0) {
async fn core1_task(p: PIN_1) {
info!("CORE1 is running");
CHANNEL0.recv().await;
CHANNEL0.receive().await;
let mut pin = Input::new(p, Pull::Down);
let wait = pin.wait_for_rising_edge();

4
tests/rp/src/bin/multicore.rs
View file

@ -33,7 +33,7 @@ async fn core0_task() {
info!("CORE0 is running");
let ping = true;
CHANNEL0.send(ping).await;
let pong = CHANNEL1.recv().await;
let pong = CHANNEL1.receive().await;
assert_eq!(ping, pong);
info!("Test OK");
@ -43,6 +43,6 @@ async fn core0_task() {
#[embassy_executor::task]
async fn core1_task() {
info!("CORE1 is running");
let ping = CHANNEL0.recv().await;
let ping = CHANNEL0.receive().await;
CHANNEL1.send(ping).await;
}