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use static cell instead of custom struct

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This commit is contained in:
Robin Müller
2025-02-07 15:56:03 +01:00
parent c9c9e4f735
commit d4082fa098
3 changed files with 76 additions and 158 deletions
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138
satrs/src/pool.rs
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@ -378,74 +378,27 @@ pub struct SubpoolConfig {
#[cfg(feature = "heapless")]
pub mod heapless_mod {
use super::*;
use core::cell::UnsafeCell;
use core::sync::atomic::{AtomicBool, Ordering};
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub struct PoolIsFull;
#[derive(Debug)]
pub struct UnsafeCellBufWrapper<T> {
val: UnsafeCell<T>,
once: AtomicBool,
}
// `Sync` is required because `UnsafeCell` is not `Sync` by default.
// This is safe as long as access is manually synchronized.
unsafe impl<T> Sync for UnsafeCellBufWrapper<T> {}
impl<T: Sync> UnsafeCellBufWrapper<T> {
/// Creates a new wrapper around an arbitrary value which should be [Sync].
pub const fn new(v: T) -> Self {
unsafe { Self::new_unchecked(v) }
}
}
impl<T> UnsafeCellBufWrapper<T> {
/// Creates a new wrapper around a buffer.
///
/// # Safety
///
/// Currently, the [Sync] trait is implemented for all T and ignores the usual [Sync] bound
/// on T. This API should only be called for declaring byte buffers statically or if T is
/// known to be [Sync]. You can use [new] to let the compiler do the [Sync] check.
pub const unsafe fn new_unchecked(v: T) -> Self {
Self {
val: UnsafeCell::new(v),
once: AtomicBool::new(false),
}
}
/// Retrieves a mutable reference to the internal value once.
///
/// All subsequent calls return None.
pub fn get_mut(&self) -> Option<&mut T> {
if self.once.load(Ordering::Relaxed) {
return None;
}
// Safety: We ensure that this is only done once with an [AtomicBool].
let mut_ref = unsafe { &mut *self.val.get() };
self.once.store(true, Ordering::Relaxed);
Some(mut_ref)
}
}
/// Helper macro to generate static buffers for the [crate::pool::StaticHeaplessMemoryPool].
#[macro_export]
macro_rules! static_subpool {
($pool_name: ident, $sizes_list_name: ident, $num_blocks: expr, $block_size: expr) => {
static $pool_name: $crate::pool::UnsafeCellBufWrapper<[u8; $num_blocks * $block_size]> =
$crate::pool::UnsafeCellBufWrapper::new([0; $num_blocks * $block_size]);
static $sizes_list_name: $crate::pool::UnsafeCellBufWrapper<[usize; $num_blocks]> =
$crate::pool::UnsafeCellBufWrapper::new([$crate::pool::STORE_FREE; $num_blocks]);
static $pool_name: static_cell::ConstStaticCell<[u8; $num_blocks * $block_size]> =
static_cell::ConstStaticCell::new([0; $num_blocks * $block_size]);
static $sizes_list_name: static_cell::ConstStaticCell<[usize; $num_blocks]> =
static_cell::ConstStaticCell::new([$crate::pool::STORE_FREE; $num_blocks]);
};
($pool_name: ident, $sizes_list_name: ident, $num_blocks: expr, $block_size: expr, $meta_data: meta) => {
#[$meta_data]
static $pool_name: $crate::pool::UnsafeCellBufWrapper<[u8; $num_blocks * $block_size]> =
$crate::pool::UnsafeCellBufWrapper::new([0; $num_blocks * $block_size]);
static $pool_name: static_cell::ConstStaticCell<[u8; $num_blocks * $block_size]> =
static_cell::ConstStaticCell::new([0; $num_blocks * $block_size]);
#[$meta_data]
static $sizes_list_name: $crate::pool::UnsafeCellBufWrapper<[usize; $num_blocks]> =
$crate::pool::UnsafeCellBufWrapper::new([$crate::pool::STORE_FREE; $num_blocks]);
static $sizes_list_name: static_cell::ConstStaticCell<[usize; $num_blocks]> =
static_cell::ConstStaticCell::new([$crate::pool::STORE_FREE; $num_blocks]);
};
}
@ -482,14 +435,14 @@ pub mod heapless_mod {
///
/// let mut mem_pool: StaticHeaplessMemoryPool<2> = StaticHeaplessMemoryPool::new(true);
/// mem_pool.grow(
/// SUBPOOL_SMALL.get_mut().unwrap(),
/// SUBPOOL_SMALL_SIZES.get_mut().unwrap(),
/// SUBPOOL_SMALL.take(),
/// SUBPOOL_SMALL_SIZES.take(),
/// SUBPOOL_SMALL_NUM_BLOCKS,
/// false
/// ).unwrap();
/// mem_pool.grow(
/// SUBPOOL_LARGE.get_mut().unwrap(),
/// SUBPOOL_LARGE_SIZES.get_mut().unwrap(),
/// SUBPOOL_LARGE.take(),
/// SUBPOOL_LARGE_SIZES.take(),
/// SUBPOOL_LARGE_NUM_BLOCKS,
/// false
/// ).unwrap();
@ -1639,9 +1592,11 @@ mod tests {
const SUBPOOL_1_BLOCK_SIZE: usize = 4;
const SUBPOOL_1_NUM_ELEMENTS: u16 = 4;
static SUBPOOL_1: UnsafeCellBufWrapper<
static SUBPOOL_1: static_cell::ConstStaticCell<
[u8; SUBPOOL_1_NUM_ELEMENTS as usize * SUBPOOL_1_BLOCK_SIZE],
> = UnsafeCellBufWrapper::new([0; SUBPOOL_1_NUM_ELEMENTS as usize * SUBPOOL_1_BLOCK_SIZE]);
> = static_cell::ConstStaticCell::new(
[0; SUBPOOL_1_NUM_ELEMENTS as usize * SUBPOOL_1_BLOCK_SIZE],
);
static SUBPOOL_1_SIZES: Mutex<UnsafeCell<[usize; SUBPOOL_1_NUM_ELEMENTS as usize]>> =
Mutex::new(UnsafeCell::new(
@ -1650,11 +1605,14 @@ mod tests {
const SUBPOOL_2_NUM_ELEMENTS: u16 = 2;
const SUBPOOL_2_BLOCK_SIZE: usize = 8;
static SUBPOOL_2: UnsafeCellBufWrapper<
static SUBPOOL_2: static_cell::ConstStaticCell<
[u8; SUBPOOL_2_NUM_ELEMENTS as usize * SUBPOOL_2_BLOCK_SIZE],
> = UnsafeCellBufWrapper::new([0; SUBPOOL_2_NUM_ELEMENTS as usize * SUBPOOL_2_BLOCK_SIZE]);
static SUBPOOL_2_SIZES: UnsafeCellBufWrapper<[usize; SUBPOOL_2_NUM_ELEMENTS as usize]> =
UnsafeCellBufWrapper::new([STORE_FREE; SUBPOOL_2_NUM_ELEMENTS as usize]);
> = static_cell::ConstStaticCell::new(
[0; SUBPOOL_2_NUM_ELEMENTS as usize * SUBPOOL_2_BLOCK_SIZE],
);
static SUBPOOL_2_SIZES: static_cell::ConstStaticCell<
[usize; SUBPOOL_2_NUM_ELEMENTS as usize],
> = static_cell::ConstStaticCell::new([STORE_FREE; SUBPOOL_2_NUM_ELEMENTS as usize]);
const SUBPOOL_3_NUM_ELEMENTS: u16 = 1;
const SUBPOOL_3_BLOCK_SIZE: usize = 16;
@ -1697,7 +1655,7 @@ mod tests {
StaticHeaplessMemoryPool::new(false);
assert!(heapless_pool
.grow(
SUBPOOL_1.get_mut().unwrap(),
SUBPOOL_1.take(),
unsafe { &mut *SUBPOOL_1_SIZES.lock().unwrap().get() },
SUBPOOL_1_NUM_ELEMENTS,
true
@ -1705,16 +1663,16 @@ mod tests {
.is_ok());
assert!(heapless_pool
.grow(
SUBPOOL_2.get_mut().unwrap(),
SUBPOOL_2_SIZES.get_mut().unwrap(),
SUBPOOL_2.take(),
SUBPOOL_2_SIZES.take(),
SUBPOOL_2_NUM_ELEMENTS,
true
)
.is_ok());
assert!(heapless_pool
.grow(
SUBPOOL_3.get_mut().unwrap(),
SUBPOOL_3_SIZES.get_mut().unwrap(),
SUBPOOL_3.take(),
SUBPOOL_3_SIZES.take(),
SUBPOOL_3_NUM_ELEMENTS,
true
)
@ -1836,16 +1794,16 @@ mod tests {
StaticHeaplessMemoryPool::new(true);
assert!(heapless_pool
.grow(
SUBPOOL_2.get_mut().unwrap(),
SUBPOOL_2_SIZES.get_mut().unwrap(),
SUBPOOL_2.take(),
SUBPOOL_2_SIZES.take(),
SUBPOOL_2_NUM_ELEMENTS,
true
)
.is_ok());
assert!(heapless_pool
.grow(
SUBPOOL_4.get_mut().unwrap(),
SUBPOOL_4_SIZES.get_mut().unwrap(),
SUBPOOL_4.take(),
SUBPOOL_4_SIZES.take(),
SUBPOOL_4_NUM_ELEMENTS,
true
)
@ -1859,16 +1817,16 @@ mod tests {
StaticHeaplessMemoryPool::new(true);
assert!(heapless_pool
.grow(
SUBPOOL_5.get_mut().unwrap(),
SUBPOOL_5_SIZES.get_mut().unwrap(),
SUBPOOL_5.take(),
SUBPOOL_5_SIZES.take(),
SUBPOOL_5_NUM_ELEMENTS,
true
)
.is_ok());
assert!(heapless_pool
.grow(
SUBPOOL_3.get_mut().unwrap(),
SUBPOOL_3_SIZES.get_mut().unwrap(),
SUBPOOL_3.take(),
SUBPOOL_3_SIZES.take(),
SUBPOOL_3_NUM_ELEMENTS,
true
)
@ -1882,24 +1840,24 @@ mod tests {
StaticHeaplessMemoryPool::new(true);
assert!(heapless_pool
.grow(
SUBPOOL_5.get_mut().unwrap(),
SUBPOOL_5_SIZES.get_mut().unwrap(),
SUBPOOL_5.take(),
SUBPOOL_5_SIZES.take(),
SUBPOOL_5_NUM_ELEMENTS,
true
)
.is_ok());
assert!(heapless_pool
.grow(
SUBPOOL_6.get_mut().unwrap(),
SUBPOOL_6_SIZES.get_mut().unwrap(),
SUBPOOL_6.take(),
SUBPOOL_6_SIZES.take(),
SUBPOOL_6_NUM_ELEMENTS,
true
)
.is_ok());
assert!(heapless_pool
.grow(
SUBPOOL_3.get_mut().unwrap(),
SUBPOOL_3_SIZES.get_mut().unwrap(),
SUBPOOL_3.take(),
SUBPOOL_3_SIZES.take(),
SUBPOOL_3_NUM_ELEMENTS,
true
)
@ -1913,24 +1871,24 @@ mod tests {
StaticHeaplessMemoryPool::new(true);
assert!(heapless_pool
.grow(
SUBPOOL_5.get_mut().unwrap(),
SUBPOOL_5_SIZES.get_mut().unwrap(),
SUBPOOL_5.take(),
SUBPOOL_5_SIZES.take(),
SUBPOOL_5_NUM_ELEMENTS,
true
)
.is_ok());
assert!(heapless_pool
.grow(
SUBPOOL_6.get_mut().unwrap(),
SUBPOOL_6_SIZES.get_mut().unwrap(),
SUBPOOL_6.take(),
SUBPOOL_6_SIZES.take(),
SUBPOOL_6_NUM_ELEMENTS,
true
)
.is_ok());
assert!(heapless_pool
.grow(
SUBPOOL_3.get_mut().unwrap(),
SUBPOOL_3_SIZES.get_mut().unwrap(),
SUBPOOL_3.take(),
SUBPOOL_3_SIZES.take(),
SUBPOOL_3_NUM_ELEMENTS,
true
)