Merge pull request #3402 from sourcebox/sync-additions

embassy-sync: documentation and clippy fixes

embassy-sync/CHANGELOG.md

@@ -7,7 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
-- Add LazyLock sync primitive.
+- Add `LazyLock` sync primitive.
+- Add `Watch` sync primitive.
 - Add `clear`, `len`, `is_empty` and `is_full` functions to `zerocopy_channel`.
 - Add `capacity`, `free_capacity`, `clear`, `len`, `is_empty` and `is_full` functions to `channel::{Sender, Receiver}`.
 - Add `capacity`, `free_capacity`, `clear`, `len`, `is_empty` and `is_full` functions to `priority_channel::{Sender, Receiver}`.
@@ -19,20 +20,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add `capacity`, `free_capacity`, `clear`, `len`, `is_empty` and `is_full` functions to `PubSubChannel`.
 - Made `PubSubBehavior` sealed
   - If you called `.publish_immediate(...)` on the queue directly before, then now call `.immediate_publisher().publish_immediate(...)`
-- Add OnceLock sync primitive.
-- Add constructor for DynamicChannel
-- Add ready_to_receive functions to Channel and Receiver.
+- Add `OnceLock` sync primitive.
+- Add constructor for `DynamicChannel`
+- Add ready_to_receive functions to `Channel` and `Receiver`.
 
 ## 0.5.0 - 2023-12-04
 
-- Add a PriorityChannel.
-- Remove nightly and unstable-traits features in preparation for 1.75.
-- Upgrade heapless to 0.8.
-- Upgrade static-cell to 2.0.
+- Add a `PriorityChannel`.
+- Remove `nightly` and `unstable-traits` features in preparation for 1.75.
+- Upgrade `heapless` to 0.8.
+- Upgrade `static-cell` to 2.0.
 
 ## 0.4.0 - 2023-10-31
 
-- Re-add impl_trait_projections
+- Re-add `impl_trait_projections`
 - switch to `embedded-io 0.6`
 
 ## 0.3.0 - 2023-09-14

embassy-sync/src/blocking_mutex/mod.rs

@@ -104,6 +104,7 @@ impl<T> Mutex<raw::CriticalSectionRawMutex, T> {
 
 impl<T> Mutex<raw::NoopRawMutex, T> {
     /// Borrows the data
+    #[allow(clippy::should_implement_trait)]
     pub fn borrow(&self) -> &T {
         let ptr = self.data.get() as *const T;
         unsafe { &*ptr }

embassy-sync/src/mutex.rs

@@ -138,7 +138,7 @@ impl<M: RawMutex, T> From<T> for Mutex<M, T> {
 impl<M, T> Default for Mutex<M, T>
 where
     M: RawMutex,
-    T: ?Sized + Default,
+    T: Default,
 {
     fn default() -> Self {
         Self::new(Default::default())