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#![cfg_attr(not(any(feature = "arch-std", feature = "arch-wasm")), no_std)]
#![allow(clippy::new_without_default)]
#![doc = include_str!("../README.md")]
#![warn(missing_docs)]
//! ## Feature flags
#![doc = document_features::document_features!(feature_label = r#"<span class="stab portability"><code>{feature}</code></span>"#)]
// This mod MUST go first, so that the others see its macros.
pub(crate) mod fmt;
pub use embassy_executor_macros::task;
macro_rules! check_at_most_one {
(@amo [$($feats:literal)*] [] [$($res:tt)*]) => {
#[cfg(any($($res)*))]
compile_error!(concat!("At most one of these features can be enabled at the same time:", $(" `", $feats, "`",)*));
};
(@amo $feats:tt [$curr:literal $($rest:literal)*] [$($res:tt)*]) => {
check_at_most_one!(@amo $feats [$($rest)*] [$($res)* $(all(feature=$curr, feature=$rest),)*]);
};
($($f:literal),*$(,)?) => {
check_at_most_one!(@amo [$($f)*] [$($f)*] []);
};
}
check_at_most_one!(
"arch-avr",
"arch-cortex-m",
"arch-riscv32",
"arch-std",
"arch-wasm",
"arch-spin",
);
#[cfg(feature = "_arch")]
#[cfg_attr(feature = "arch-avr", path = "arch/avr.rs")]
#[cfg_attr(feature = "arch-cortex-m", path = "arch/cortex_m.rs")]
#[cfg_attr(feature = "arch-riscv32", path = "arch/riscv32.rs")]
#[cfg_attr(feature = "arch-std", path = "arch/std.rs")]
#[cfg_attr(feature = "arch-wasm", path = "arch/wasm.rs")]
#[cfg_attr(feature = "arch-spin", path = "arch/spin.rs")]
mod arch;
#[cfg(feature = "_arch")]
#[allow(unused_imports)] // don't warn if the module is empty.
pub use arch::*;
pub mod raw;
mod spawner;
pub use spawner::*;
/// Implementation details for embassy macros.
/// Do not use. Used for macros and HALs only. Not covered by semver guarantees.
#[doc(hidden)]
#[cfg(not(feature = "nightly"))]
pub mod _export {
use core::cell::UnsafeCell;
use core::future::Future;
use core::mem::MaybeUninit;
use crate::raw::TaskPool;
pub trait TaskFn<Args>: Copy {
type Fut: Future + 'static;
}
macro_rules! task_fn_impl {
($($Tn:ident),*) => {
impl<F, Fut, $($Tn,)*> TaskFn<($($Tn,)*)> for F
where
F: Copy + FnOnce($($Tn,)*) -> Fut,
Fut: Future + 'static,
{
type Fut = Fut;
}
};
}
task_fn_impl!();
task_fn_impl!(T0);
task_fn_impl!(T0, T1);
task_fn_impl!(T0, T1, T2);
task_fn_impl!(T0, T1, T2, T3);
task_fn_impl!(T0, T1, T2, T3, T4);
task_fn_impl!(T0, T1, T2, T3, T4, T5);
task_fn_impl!(T0, T1, T2, T3, T4, T5, T6);
task_fn_impl!(T0, T1, T2, T3, T4, T5, T6, T7);
task_fn_impl!(T0, T1, T2, T3, T4, T5, T6, T7, T8);
task_fn_impl!(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9);
task_fn_impl!(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10);
task_fn_impl!(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11);
task_fn_impl!(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12);
task_fn_impl!(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13);
task_fn_impl!(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14);
task_fn_impl!(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15);
#[allow(private_bounds)]
#[repr(C)]
pub struct TaskPoolHolder<const SIZE: usize, const ALIGN: usize>
where
Align<ALIGN>: Alignment,
{
data: UnsafeCell<[MaybeUninit<u8>; SIZE]>,
align: Align<ALIGN>,
}
unsafe impl<const SIZE: usize, const ALIGN: usize> Send for TaskPoolHolder<SIZE, ALIGN> where Align<ALIGN>: Alignment {}
unsafe impl<const SIZE: usize, const ALIGN: usize> Sync for TaskPoolHolder<SIZE, ALIGN> where Align<ALIGN>: Alignment {}
#[allow(private_bounds)]
impl<const SIZE: usize, const ALIGN: usize> TaskPoolHolder<SIZE, ALIGN>
where
Align<ALIGN>: Alignment,
{
pub const fn get(&self) -> *const u8 {
self.data.get().cast()
}
}
pub const fn task_pool_size<F, Args, Fut, const POOL_SIZE: usize>(_: F) -> usize
where
F: TaskFn<Args, Fut = Fut>,
Fut: Future + 'static,
{
size_of::<TaskPool<Fut, POOL_SIZE>>()
}
pub const fn task_pool_align<F, Args, Fut, const POOL_SIZE: usize>(_: F) -> usize
where
F: TaskFn<Args, Fut = Fut>,
Fut: Future + 'static,
{
align_of::<TaskPool<Fut, POOL_SIZE>>()
}
pub const fn task_pool_new<F, Args, Fut, const POOL_SIZE: usize>(_: F) -> TaskPool<Fut, POOL_SIZE>
where
F: TaskFn<Args, Fut = Fut>,
Fut: Future + 'static,
{
TaskPool::new()
}
#[allow(private_bounds)]
#[repr(transparent)]
pub struct Align<const N: usize>([<Self as Alignment>::Archetype; 0])
where
Self: Alignment;
trait Alignment {
/// A zero-sized type of particular alignment.
type Archetype: Copy + Eq + PartialEq + Send + Sync + Unpin;
}
macro_rules! aligns {
($($AlignX:ident: $n:literal,)*) => {
$(
#[derive(Copy, Clone, Eq, PartialEq)]
#[repr(align($n))]
struct $AlignX {}
impl Alignment for Align<$n> {
type Archetype = $AlignX;
}
)*
};
}
aligns!(
Align1: 1,
Align2: 2,
Align4: 4,
Align8: 8,
Align16: 16,
Align32: 32,
Align64: 64,
Align128: 128,
Align256: 256,
Align512: 512,
Align1024: 1024,
Align2048: 2048,
Align4096: 4096,
Align8192: 8192,
Align16384: 16384,
);
#[cfg(any(target_pointer_width = "32", target_pointer_width = "64"))]
aligns!(
Align32768: 32768,
Align65536: 65536,
Align131072: 131072,
Align262144: 262144,
Align524288: 524288,
Align1048576: 1048576,
Align2097152: 2097152,
Align4194304: 4194304,
Align8388608: 8388608,
Align16777216: 16777216,
Align33554432: 33554432,
Align67108864: 67108864,
Align134217728: 134217728,
Align268435456: 268435456,
Align536870912: 536870912,
);
}
|
