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# Version 5.4.0
- Add a `no_std` implementation based on the `critical-section` crate, enabled
via the feature of the same name. (#148)
# Version 5.3.1
- Disable some optimizations that, in rare conditions, can cause race conditions
causing notifications to be dropped. (#139)
- Ensure the portable-atomic feature is set properly. (#134)
- Update `portable-atomic-util` to v0.2.0. (#132)
- Document the std feature. (#134)
# Version 5.3.0
- Add a `loom` implementation. This feature is unstable and is not semver-supported. (#126)
- Make the panic message for polling the `EventListener` after it has completed more clear. (#125)
# Version 5.2.0
- Make `StackSlot` `Sync`. (#121)
# Version 5.1.0
- Make `StackSlot` `Send`. (#119)
# Version 5.0.0
- **Breaking:** Rework the API to afford better usage. (#105)
- The heap-based API of the v2.x line is back.
- However, there is a stack-based API as an alternative.
- Add a way to get the total number of listeners. (#114)
# Version 4.0.3
- Relax MSRV to 1.60. (#110)
# Version 4.0.2
- Avoid spinning in `wait_deadline`. (#107)
# Version 4.0.1
- Fix a use-after-move error after an `EventListener` is assigned to listen to
another `Event`. (#101)
# Version 4.0.0
- **Breaking:** Fix a footgun in the `EventListener` type. `EventListener::new()`
now no longer takes an `&Event` as an argument, and `EventListener::listen()`
takes the `&Event` as an argument. Hopefully this should prevent `.await`ing
on a listener without making sure it's listening first. (#94)
# Version 3.1.0
- Implement `UnwindSafe` and `RefUnwindSafe` for `EventListener`. This was unintentionally removed in version 3 (#96).
# Version 3.0.1
- Emphasize that `listen()` must be called on `EventListener` in documentation. (#90)
- Write useful output in `fmt::Debug` implementations. (#86)
# Version 3.0.0
- Use the `parking` crate instead of threading APIs (#27)
- Bump MSRV to 1.59 (#71)
- **Breaking:** Make this crate `no_std`-compatible on `default-features = false`. (#34)
- Create a new `event-listener-strategy` crate for abstracting over blocking/non-blocking operations. (#49)
- **Breaking:** Change the `EventListener` API to be `!Unpin`. (#51)
- Enable a feature for the `portable-atomic` crate. (#53)
- **Breaking:** Add a `Notification` trait which is used to enable tagged events. (#52)
- Add an `is_notified()` method to `Event`. (#48)
- **Breaking:** Make it so `notify()` returns the number of listeners notified. (#57)
# Version 2.5.3
- Fix fence on x86 and miri.
# Version 2.5.2
- Fix stacked borrows violation when `-Zmiri-tag-raw-pointers` is enabled. (#24)
# Version 2.5.1
- Replace spinlock with a mutex.
# Version 2.5.0
- Add `EventListener::discard()`.
# Version 2.4.0
- `Event::new()` is now a const fn.
# Version 2.3.3
- Fix a bug in `List::insert()` that was causing deadlocks.
# Version 2.3.2
- Optimization: use a simple spinlock and cache an `Entry` for less allocation.
# Version 2.3.1
- Optimization: don't initialize `Inner` when notifying `Event`.
# Version 2.3.0
- Implement `UnwindSafe`/`RefUnwindSafe` for `Event`/`EventListener`.
# Version 2.2.1
- Always keep the last waker in `EventListener::poll()`.
# Version 2.2.0
- Add `EventListener::same_event()`.
# Version 2.1.0
- Add `EventListener::listens_to()`.
# Version 2.0.1
- Replace `usize::MAX` with `std::usize::MAX`.
# Version 2.0.0
- Remove `Event::notify_one()` and `Event::notify_all()`.
- Add `Event::notify_relaxed()` and `Event::notify_additional_relaxed()`.
- Dropped notified `EventListener` now notifies one *or* one additional listener.
# Version 1.2.0
- Add `Event::notify_additional()`.
# Version 1.1.2
- Change a `Relaxed` load to `Acquire` load.
# Version 1.1.1
- Fix a bug in `EventListener::wait_timeout()`.
# Version 1.1.0
- Add `EventListener::notify()`.
# Version 1.0.1
- Reduce the complexity of `notify_all()` from O(n) to amortized O(1).
- Fix a bug where entries were notified in wrong order.
- Add tests.
# Version 1.0.0
- Initial version.
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