vendor/parking_lot-0.11.2/CHANGELOG.md - toolchain/rustc - Git at Google

 ## parking_lot 0.11.2, parking_lot_core 0.8.4, lock_api 0.4.5 (2021-08-28)

 - Fixed incorrect memory orderings on `RwLock` and `WordLock`. (#294, #292)
 - Added `Arc`-based lock guards. (#291)
 - Added workaround for TSan's lack of support for `fence`. (#292)

 ## lock_api 0.4.4 (2021-05-01)

 - Update for latest nightly. (#281)

 ## lock_api 0.4.3 (2021-04-03)

 - Added `[Raw]ReentrantMutex::is_owned`. (#280)

 ## parking_lot_core 0.8.3 (2021-02-12)

 - Updated smallvec to 1.6. (#276)

 ## parking_lot_core 0.8.2 (2020-12-21)

 - Fixed assertion failure on OpenBSD. (#270)

 ## parking_lot_core 0.8.1 (2020-12-04)

 - Removed deprecated CloudABI support. (#263)
 - Fixed build on wasm32-unknown-unknown. (#265)
 - Relaxed dependency on `smallvec`. (#266)

 ## parking_lot 0.11.1, lock_api 0.4.2 (2020-11-18)

 - Fix bounds on Send and Sync impls for lock guards. (#262)
 - Fix incorrect memory ordering in `RwLock`. (#260)

 ## lock_api 0.4.1 (2020-07-06)

 - Add `data_ptr` method to lock types to allow unsafely accessing the inner data
   without a guard. (#247)

 ## parking_lot 0.11.0, parking_lot_core 0.8.0, lock_api 0.4.0 (2020-06-23)

 - Add `is_locked` method to mutex types. (#235)
 - Make `RawReentrantMutex` public. (#233)
 - Allow lock guard to be sent to another thread with the `send_guard` feature. (#240)
 - Use `Instant` type from the `instant` crate on wasm32-unknown-unknown. (#231)
 - Remove deprecated and unsound `MappedRwLockWriteGuard::downgrade`. (#244)
 - Most methods on the `Raw*` traits have been made unsafe since they assume
   the current thread holds the lock. (#243)

 ## parking_lot_core 0.7.2 (2020-04-21)

 - Add support for `wasm32-unknown-unknown` under the "nightly" feature. (#226)

 ## parking_lot 0.10.2 (2020-04-10)

 - Update minimum version of `lock_api`.

 ## parking_lot 0.10.1, parking_lot_core 0.7.1, lock_api 0.3.4 (2020-04-10)

 - Add methods to construct `Mutex`, `RwLock`, etc in a `const` context. (#217)
 - Add `FairMutex` which always uses fair unlocking. (#204)
 - Fixed panic with deadlock detection on macOS. (#203)
 - Fixed incorrect synchronization in `create_hashtable`. (#210)
 - Use `llvm_asm!` instead of the deprecated `asm!`. (#223)

 ## lock_api 0.3.3 (2020-01-04)

 - Deprecate unsound `MappedRwLockWriteGuard::downgrade` (#198)

 ## parking_lot 0.10.0, parking_lot_core 0.7.0, lock_api 0.3.2 (2019-11-25)

 - Upgrade smallvec dependency to 1.0 in parking_lot_core.
 - Replace all usage of `mem::uninitialized` with `mem::MaybeUninit`.
 - The minimum required Rust version is bumped to 1.36. Because of the above two changes.
 - Make methods on `WaitTimeoutResult` and `OnceState` take `self` by value instead of reference.

 ## parking_lot_core 0.6.2 (2019-07-22)

 - Fixed compile error on Windows with old cfg_if version. (#164)

 ## parking_lot_core 0.6.1 (2019-07-17)

 - Fixed Android build. (#163)

 ## parking_lot 0.9.0, parking_lot_core 0.6.0, lock_api 0.3.1 (2019-07-14)

 - Re-export lock_api (0.3.1) from parking_lot (#150)
 - Removed (non-dev) dependency on rand crate for fairness mechanism, by
   including a simple xorshift PRNG in core (#144)
 - Android now uses the futex-based ThreadParker. (#140)
 - Fixed CloudABI ThreadParker. (#140)
 - Fix race condition in lock_api::ReentrantMutex (da16c2c7)

 ## lock_api 0.3.0 (2019-07-03, _yanked_)

 - Use NonZeroUsize in GetThreadId::nonzero_thread_id (#148)
 - Debug assert lock_count in ReentrantMutex (#148)
 - Tag as `unsafe` and document some internal methods (#148)
 - This release was _yanked_ due to a regression in ReentrantMutex (da16c2c7)

 ## parking_lot 0.8.1 (2019-07-03, _yanked_)

 - Re-export lock_api (0.3.0) from parking_lot (#150)
 - This release was _yanked_ from crates.io due to unexpected breakage (#156)

 ## parking_lot 0.8.0, parking_lot_core 0.5.0, lock_api 0.2.0 (2019-05-04)

 - Fix race conditions in deadlock detection.
 - Support for more platforms by adding ThreadParker implementations for
   Wasm, Redox, SGX and CloudABI.
 - Drop support for older Rust. parking_lot now requires 1.31 and is a
   Rust 2018 edition crate (#122).
 - Disable the owning_ref feature by default.
 - Fix was_last_thread value in the timeout callback of park() (#129).
 - Support single byte Mutex/Once on stable Rust when compiler is at least
   version 1.34.
 - Make Condvar::new and Once::new const fns on stable Rust and remove
   ONCE_INIT (#134).
 - Add optional Serde support (#135).

 ## parking_lot 0.7.1 (2019-01-01)

 - Fixed potential deadlock when upgrading a RwLock.
 - Fixed overflow panic on very long timeouts (#111).

 ## parking_lot 0.7.0, parking_lot_core 0.4.0 (2018-11-26)

 - Return if or how many threads were notified from `Condvar::notify_*`

 ## parking_lot 0.6.3 (2018-07-18)

 - Export `RawMutex`, `RawRwLock` and `RawThreadId`.

 ## parking_lot 0.6.2 (2018-06-18)

 - Enable `lock_api/nightly` feature from `parking_lot/nightly` (#79)

 ## parking_lot 0.6.1 (2018-06-08)

 Added missing typedefs for mapped lock guards:

 - `MappedMutexGuard`
 - `MappedReentrantMutexGuard`
 - `MappedRwLockReadGuard`
 - `MappedRwLockWriteGuard`

 ## parking_lot 0.6.0 (2018-06-08)

 This release moves most of the code for type-safe `Mutex` and `RwLock` types
 into a separate crate called `lock_api`. This new crate is compatible with
 `no_std` and provides `Mutex` and `RwLock` type-safe wrapper types from a raw
 mutex type which implements the `RawMutex` or `RawRwLock` trait. The API
 provided by the wrapper types can be extended by implementing more traits on
 the raw mutex type which provide more functionality (e.g. `RawMutexTimed`). See
 the crate documentation for more details.

 There are also several major changes:

 - The minimum required Rust version is bumped to 1.26.
 - All methods on `MutexGuard` (and other guard types) are no longer inherent
   methods and must be called as `MutexGuard::method(self)`. This avoids
   conflicts with methods from the inner type.
 - `MutexGuard` (and other guard types) add the `unlocked` method which
   temporarily unlocks a mutex, runs the given closure, and then re-locks the
    mutex.
 - `MutexGuard` (and other guard types) add the `bump` method which gives a
   chance for other threads to acquire the mutex by temporarily unlocking it and
   re-locking it. However this is optimized for the common case where there are
   no threads waiting on the lock, in which case no unlocking is performed.
 - `MutexGuard` (and other guard types) add the `map` method which returns a
   `MappedMutexGuard` which holds only a subset of the original locked type. The
   `MappedMutexGuard` type is identical to `MutexGuard` except that it does not
   support the `unlocked` and `bump` methods, and can't be used with `CondVar`.
	## parking_lot 0.11.2, parking_lot_core 0.8.4, lock_api 0.4.5 (2021-08-28)

	- Fixed incorrect memory orderings on `RwLock` and `WordLock`. (#294, #292)
	- Added `Arc`-based lock guards. (#291)
	- Added workaround for TSan's lack of support for `fence`. (#292)

	## lock_api 0.4.4 (2021-05-01)

	- Update for latest nightly. (#281)

	## lock_api 0.4.3 (2021-04-03)

	- Added `[Raw]ReentrantMutex::is_owned`. (#280)

	## parking_lot_core 0.8.3 (2021-02-12)

	- Updated smallvec to 1.6. (#276)

	## parking_lot_core 0.8.2 (2020-12-21)

	- Fixed assertion failure on OpenBSD. (#270)

	## parking_lot_core 0.8.1 (2020-12-04)

	- Removed deprecated CloudABI support. (#263)
	- Fixed build on wasm32-unknown-unknown. (#265)
	- Relaxed dependency on `smallvec`. (#266)

	## parking_lot 0.11.1, lock_api 0.4.2 (2020-11-18)

	- Fix bounds on Send and Sync impls for lock guards. (#262)
	- Fix incorrect memory ordering in `RwLock`. (#260)

	## lock_api 0.4.1 (2020-07-06)

	- Add `data_ptr` method to lock types to allow unsafely accessing the inner data
	without a guard. (#247)

	## parking_lot 0.11.0, parking_lot_core 0.8.0, lock_api 0.4.0 (2020-06-23)

	- Add `is_locked` method to mutex types. (#235)
	- Make `RawReentrantMutex` public. (#233)
	- Allow lock guard to be sent to another thread with the `send_guard` feature. (#240)
	- Use `Instant` type from the `instant` crate on wasm32-unknown-unknown. (#231)
	- Remove deprecated and unsound `MappedRwLockWriteGuard::downgrade`. (#244)
	- Most methods on the `Raw*` traits have been made unsafe since they assume
	the current thread holds the lock. (#243)

	## parking_lot_core 0.7.2 (2020-04-21)

	- Add support for `wasm32-unknown-unknown` under the "nightly" feature. (#226)

	## parking_lot 0.10.2 (2020-04-10)

	- Update minimum version of `lock_api`.

	## parking_lot 0.10.1, parking_lot_core 0.7.1, lock_api 0.3.4 (2020-04-10)

	- Add methods to construct `Mutex`, `RwLock`, etc in a `const` context. (#217)
	- Add `FairMutex` which always uses fair unlocking. (#204)
	- Fixed panic with deadlock detection on macOS. (#203)
	- Fixed incorrect synchronization in `create_hashtable`. (#210)
	- Use `llvm_asm!` instead of the deprecated `asm!`. (#223)

	## lock_api 0.3.3 (2020-01-04)

	- Deprecate unsound `MappedRwLockWriteGuard::downgrade` (#198)

	## parking_lot 0.10.0, parking_lot_core 0.7.0, lock_api 0.3.2 (2019-11-25)

	- Upgrade smallvec dependency to 1.0 in parking_lot_core.
	- Replace all usage of `mem::uninitialized` with `mem::MaybeUninit`.
	- The minimum required Rust version is bumped to 1.36. Because of the above two changes.
	- Make methods on `WaitTimeoutResult` and `OnceState` take `self` by value instead of reference.

	## parking_lot_core 0.6.2 (2019-07-22)

	- Fixed compile error on Windows with old cfg_if version. (#164)

	## parking_lot_core 0.6.1 (2019-07-17)

	- Fixed Android build. (#163)

	## parking_lot 0.9.0, parking_lot_core 0.6.0, lock_api 0.3.1 (2019-07-14)

	- Re-export lock_api (0.3.1) from parking_lot (#150)
	- Removed (non-dev) dependency on rand crate for fairness mechanism, by
	including a simple xorshift PRNG in core (#144)
	- Android now uses the futex-based ThreadParker. (#140)
	- Fixed CloudABI ThreadParker. (#140)
	- Fix race condition in lock_api::ReentrantMutex (da16c2c7)

	## lock_api 0.3.0 (2019-07-03, _yanked_)

	- Use NonZeroUsize in GetThreadId::nonzero_thread_id (#148)
	- Debug assert lock_count in ReentrantMutex (#148)
	- Tag as `unsafe` and document some internal methods (#148)
	- This release was _yanked_ due to a regression in ReentrantMutex (da16c2c7)

	## parking_lot 0.8.1 (2019-07-03, _yanked_)

	- Re-export lock_api (0.3.0) from parking_lot (#150)
	- This release was _yanked_ from crates.io due to unexpected breakage (#156)

	## parking_lot 0.8.0, parking_lot_core 0.5.0, lock_api 0.2.0 (2019-05-04)

	- Fix race conditions in deadlock detection.
	- Support for more platforms by adding ThreadParker implementations for
	Wasm, Redox, SGX and CloudABI.
	- Drop support for older Rust. parking_lot now requires 1.31 and is a
	Rust 2018 edition crate (#122).
	- Disable the owning_ref feature by default.
	- Fix was_last_thread value in the timeout callback of park() (#129).
	- Support single byte Mutex/Once on stable Rust when compiler is at least
	version 1.34.
	- Make Condvar::new and Once::new const fns on stable Rust and remove
	ONCE_INIT (#134).
	- Add optional Serde support (#135).

	## parking_lot 0.7.1 (2019-01-01)

	- Fixed potential deadlock when upgrading a RwLock.
	- Fixed overflow panic on very long timeouts (#111).

	## parking_lot 0.7.0, parking_lot_core 0.4.0 (2018-11-26)

	- Return if or how many threads were notified from `Condvar::notify_*`

	## parking_lot 0.6.3 (2018-07-18)

	- Export `RawMutex`, `RawRwLock` and `RawThreadId`.

	## parking_lot 0.6.2 (2018-06-18)

	- Enable `lock_api/nightly` feature from `parking_lot/nightly` (#79)

	## parking_lot 0.6.1 (2018-06-08)

	Added missing typedefs for mapped lock guards:

	- `MappedMutexGuard`
	- `MappedReentrantMutexGuard`
	- `MappedRwLockReadGuard`
	- `MappedRwLockWriteGuard`

	## parking_lot 0.6.0 (2018-06-08)

	This release moves most of the code for type-safe `Mutex` and `RwLock` types
	into a separate crate called `lock_api`. This new crate is compatible with
	`no_std` and provides `Mutex` and `RwLock` type-safe wrapper types from a raw
	mutex type which implements the `RawMutex` or `RawRwLock` trait. The API
	provided by the wrapper types can be extended by implementing more traits on
	the raw mutex type which provide more functionality (e.g. `RawMutexTimed`). See
	the crate documentation for more details.

	There are also several major changes:

	- The minimum required Rust version is bumped to 1.26.
	- All methods on `MutexGuard` (and other guard types) are no longer inherent
	methods and must be called as `MutexGuard::method(self)`. This avoids
	conflicts with methods from the inner type.
	- `MutexGuard` (and other guard types) add the `unlocked` method which
	temporarily unlocks a mutex, runs the given closure, and then re-locks the
	mutex.
	- `MutexGuard` (and other guard types) add the `bump` method which gives a
	chance for other threads to acquire the mutex by temporarily unlocking it and
	re-locking it. However this is optimized for the common case where there are
	no threads waiting on the lock, in which case no unlocking is performed.
	- `MutexGuard` (and other guard types) add the `map` method which returns a
	`MappedMutexGuard` which holds only a subset of the original locked type. The
	`MappedMutexGuard` type is identical to `MutexGuard` except that it does not
	support the `unlocked` and `bump` methods, and can't be used with `CondVar`.