v3.3.0

Enhancements:

• Added Proto.Timers.
  • Timer and TimerFactory
• Added Promise.Delay APIs.
• Added Promise(<T>).WaitAsync APIs with timeouts.
• Added delayed cancelation APIs to CancelationSource.
  • CancelationSource.New(TimeSpan, (optional) TimerFactory, (optional) linked token(s))
  • CancelationSource.CancelAfter(TimeSpan)
• Added CancelationToken(bool) constructor.
• Added CancelationToken.RegisterWithoutImmediateInvoke APIs.
• Added PromiseYielder.Initialize() API to help with early code running before Unity can auto initialize.

Fixes:

• Fixed Unity initialization not being fully initialized before user Awake methods run.

Optimizations:

• Promise(<T>).ConfigureAwait(ContinuationOptions) consumes zero memory if Promise.Config.AsyncFlowExecutionContextEnabled is disabled (which is the default state).
• Reduced memory of async Promise(<T>).
• Reduced memory of async synchronization primitives
• Reduced memory of Promise.ParallelFor* APIs.
• Reduced memory of Channels.
• Optimized object pool contention.
• Internally avoid cost of zeroing types that contain no references.
• Split Promise(<T>).ContinueWith methods without a CancelationToken parameter to avoid the cost of the token when it's not needed.
• Reduced memory and increased speed of AsyncLazy<T> when the factory is invoked.
• No longer pool memory allocated from AsyncLazy<T>.

Deprecated:

• Promise(<T>).{Then, Catch, CatchCancelation} APIs accepting a CancelationToken parameter. (Prefer WaitAsync followed by the same API without the token.)
• Deprecated CancelationSource.{IsValid, TryCancel, TryDispose}. (Prefer != default and methods without Try prefix.)
• Deprecated CancelationToken.{TryRegister, TryRegisterWithoutImmediateInvoke}. (Prefer CanBeCanceled and methods without Try prefix.)
• Deprecated Promise(<T>).Deferred.{IsValid*, Try*} APIs. (Prefer != default.)
• Deprecated Promise(<T>).IsValid.

Misc:

• Changed behavior of CancelationSource.Cancel to not throw if it's called more than once.
• Changed behavior of CancelationSource, Promise(<T>).Deferred, Channel(Reader/Writer) to throw NullReferenceException if it's default.