Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

Added

Changed

Fixed

[0.9.2] - 2021-07-09

Changed

• Improved Once performance by reducing the memory footprint of internal state to one byte

Fixed

• Improved performance of Once by relaxing ordering guarantees and removing redundant checks

[0.9.1] - 2021-06-21

Added

• Default type parameter on Once for better ergonomics

[0.9.0] - 2021-03-18

Changed

• Placed all major API features behind feature flags

Fixed

• A compilation bug with the lock_api feature

[0.8.0] - 2021-03-15

Added

• Once::get_unchecked
• RelaxStrategy trait with type parameter on all locks to support switching between relax strategies

Changed

• lock_api1 feature is now named lock_api

[0.7.1] - 2021-01-12

Fixed

• Prevented Once leaking the inner value upon drop

[0.7.0] - 2020-10-18

Added

• Once::initialized
• Once::get_mut
• Once::try_into_inner
• Once::poll
• RwLock, Mutex and Once now implement From<T>
• Lazy type for lazy initialization
• TicketMutex, an alternative mutex implementation
• std feature flag to enable thread yielding instead of spinning
• Mutex::is_locked/SpinMutex::is_locked/TicketMutex::is_locked
• Barrier

Changed

• Once::wait now spins even if initialization has not yet started
• Guard::leak is now an associated function instead of a method
• Improved the performance of SpinMutex by relaxing unnecessarily conservative ordering requirements

[0.6.0] - 2020-10-08

Added

• More dynamic Send/Sync bounds for lock guards
• lock_api compatibility
• Guard::leak methods
• RwLock::reader_count and RwLock::writer_count
• Display implementation for guard types

Changed

• Made Debug impls of lock guards just show the inner type like std