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Use RefCell in blocking mutex

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This commit is contained in:
Rasmus Melchior Jacobsen 2023-05-27 17:02:54 +02:00
parent 6d8f409018
commit 85ce44f78e
1 changed files with 27 additions and 13 deletions
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40
embassy-embedded-hal/src/flash/partition/blocking.rs
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@ -1,3 +1,5 @@
use core::cell::RefCell;
use embassy_sync::blocking_mutex::raw::RawMutex;
use embassy_sync::blocking_mutex::Mutex;
use embedded_storage::nor_flash::{ErrorType, NorFlash, ReadNorFlash};
@ -12,14 +14,14 @@ use super::Error;
/// operate on mutually exclusive ranges - such a separation is up to
/// the user to guarantee.
pub struct BlockingPartition<'a, M: RawMutex, T: NorFlash> {
flash: &'a Mutex<M, T>,
flash: &'a Mutex<M, RefCell<T>>,
offset: u32,
size: u32,
}
impl<'a, M: RawMutex, T: NorFlash> BlockingPartition<'a, M, T> {
/// Create a new partition
pub const fn new(flash: &'a Mutex<M, T>, offset: u32, size: u32) -> Self {
pub const fn new(flash: &'a Mutex<M, RefCell<T>>, offset: u32, size: u32) -> Self {
if offset % T::READ_SIZE as u32 != 0 || offset % T::WRITE_SIZE as u32 != 0 || offset % T::ERASE_SIZE as u32 != 0
{
panic!("Partition offset must be a multiple of read, write and erase size");
@ -43,8 +45,12 @@ impl<M: RawMutex, T: NorFlash> ReadNorFlash for BlockingPartition<'_, M, T> {
return Err(Error::OutOfBounds);
}
self.flash
.lock(|flash| flash.read(self.offset + offset, bytes).map_err(Error::Flash))
self.flash.lock(|flash| {
flash
.borrow_mut()
.read(self.offset + offset, bytes)
.map_err(Error::Flash)
})
}
fn capacity(&self) -> usize {
@ -61,8 +67,12 @@ impl<M: RawMutex, T: NorFlash> NorFlash for BlockingPartition<'_, M, T> {
return Err(Error::OutOfBounds);
}
self.flash
.lock(|flash| flash.write(self.offset + offset, bytes).map_err(Error::Flash))
self.flash.lock(|flash| {
flash
.borrow_mut()
.write(self.offset + offset, bytes)
.map_err(Error::Flash)
})
}
fn erase(&mut self, from: u32, to: u32) -> Result<(), Self::Error> {
@ -70,8 +80,12 @@ impl<M: RawMutex, T: NorFlash> NorFlash for BlockingPartition<'_, M, T> {
return Err(Error::OutOfBounds);
}
self.flash
.lock(|flash| flash.erase(self.offset + from, self.offset + to).map_err(Error::Flash))
self.flash.lock(|flash| {
flash
.borrow_mut()
.erase(self.offset + from, self.offset + to)
.map_err(Error::Flash)
})
}
}
@ -87,7 +101,7 @@ mod tests {
let mut flash = MemFlash::<1024, 128, 4>::default();
flash.mem[132..132 + 8].fill(0xAA);
let flash = Mutex::<NoopRawMutex, _>::new(flash);
let flash = Mutex::<NoopRawMutex, _>::new(RefCell::new(flash));
let mut partition = BlockingPartition::new(&flash, 128, 256);
let mut read_buf = [0; 8];
@ -100,13 +114,13 @@ mod tests {
fn can_write() {
let flash = MemFlash::<1024, 128, 4>::default();
let flash = Mutex::<NoopRawMutex, _>::new(flash);
let flash = Mutex::<NoopRawMutex, _>::new(RefCell::new(flash));
let mut partition = BlockingPartition::new(&flash, 128, 256);
let write_buf = [0xAA; 8];
partition.write(4, &write_buf).unwrap();
let flash = flash.into_inner();
let flash = flash.into_inner().take();
assert!(flash.mem[132..132 + 8].iter().position(|&x| x != 0xAA).is_none());
}
@ -114,12 +128,12 @@ mod tests {
fn can_erase() {
let flash = MemFlash::<1024, 128, 4>::new(0x00);
let flash = Mutex::<NoopRawMutex, _>::new(flash);
let flash = Mutex::<NoopRawMutex, _>::new(RefCell::new(flash));
let mut partition = BlockingPartition::new(&flash, 128, 256);
partition.erase(0, 128).unwrap();
let flash = flash.into_inner();
let flash = flash.into_inner().take();
assert!(flash.mem[128..256].iter().position(|&x| x != 0xFF).is_none());
}
}