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import from UniRx and some modified.

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Yoshifumi Kawai
2019-05-20 00:14:47 +09:00
parent d5dab7fd1a
commit 5aaeb13c5d
246 changed files with 20742 additions and 19 deletions
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413
Assets/UniRx.Async/UniTaskCompletionSource.cs Normal file
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#if CSHARP_7_OR_LATER || (UNITY_2018_3_OR_NEWER && (NET_STANDARD_2_0 || NET_4_6))
#pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.CompilerServices;
using System.Runtime.ExceptionServices;
using System.Threading;
using UniRx.Async.Internal;
namespace UniRx.Async
{
internal class ExceptionHolder
{
ExceptionDispatchInfo exception;
bool calledGet = false;
public ExceptionHolder(ExceptionDispatchInfo exception)
{
this.exception = exception;
}
public ExceptionDispatchInfo GetException()
{
if (!calledGet)
{
calledGet = true;
GC.SuppressFinalize(this);
}
return exception;
}
~ExceptionHolder()
{
UniTaskScheduler.PublishUnobservedTaskException(exception.SourceException);
}
}
public interface IResolvePromise
{
bool TrySetResult();
}
public interface IResolvePromise<T>
{
bool TrySetResult(T value);
}
public interface IRejectPromise
{
bool TrySetException(Exception exception);
}
public interface ICancelPromise
{
bool TrySetCanceled();
}
public interface IPromise<T> : IResolvePromise<T>, IRejectPromise, ICancelPromise
{
}
public interface IPromise : IResolvePromise, IRejectPromise, ICancelPromise
{
}
public class UniTaskCompletionSource : IAwaiter, IPromise
{
// State(= AwaiterStatus)
const int Pending = 0;
const int Succeeded = 1;
const int Faulted = 2;
const int Canceled = 3;
int state = 0;
bool handled = false;
ExceptionHolder exception;
object continuation; // action or list
AwaiterStatus IAwaiter.Status => (AwaiterStatus)state;
bool IAwaiter.IsCompleted => state != Pending;
public UniTask Task => new UniTask(this);
public UniTaskCompletionSource()
{
TaskTracker.TrackActiveTask(this, 2);
}
[Conditional("UNITY_EDITOR")]
internal void MarkHandled()
{
if (!handled)
{
handled = true;
TaskTracker.RemoveTracking(this);
}
}
void IAwaiter.GetResult()
{
MarkHandled();
if (state == Succeeded)
{
return;
}
else if (state == Faulted)
{
exception.GetException().Throw();
}
else if (state == Canceled)
{
if (exception != null)
{
exception.GetException().Throw(); // guranteed operation canceled exception.
}
throw new OperationCanceledException();
}
else // Pending
{
throw new NotSupportedException("UniTask does not allow call GetResult directly when task not completed. Please use 'await'.");
}
}
void ICriticalNotifyCompletion.UnsafeOnCompleted(Action action)
{
if (Interlocked.CompareExchange(ref continuation, (object)action, null) == null)
{
if (state != Pending)
{
TryInvokeContinuation();
}
}
else
{
var c = continuation;
if (c is Action)
{
var list = new List<Action>();
list.Add((Action)c);
list.Add(action);
if (Interlocked.CompareExchange(ref continuation, list, c) == c)
{
goto TRYINVOKE;
}
}
var l = (List<Action>)continuation;
lock (l)
{
l.Add(action);
}
TRYINVOKE:
if (state != Pending)
{
TryInvokeContinuation();
}
}
}
void TryInvokeContinuation()
{
var c = Interlocked.Exchange(ref continuation, null);
if (c != null)
{
if (c is Action)
{
((Action)c).Invoke();
}
else
{
var l = (List<Action>)c;
var cnt = l.Count;
for (int i = 0; i < cnt; i++)
{
l[i].Invoke();
}
}
}
}
public bool TrySetResult()
{
if (Interlocked.CompareExchange(ref state, Succeeded, Pending) == Pending)
{
TryInvokeContinuation();
return true;
}
return false;
}
public bool TrySetException(Exception exception)
{
if (Interlocked.CompareExchange(ref state, Faulted, Pending) == Pending)
{
this.exception = new ExceptionHolder(ExceptionDispatchInfo.Capture(exception));
TryInvokeContinuation();
return true;
}
return false;
}
public bool TrySetCanceled()
{
if (Interlocked.CompareExchange(ref state, Canceled, Pending) == Pending)
{
TryInvokeContinuation();
return true;
}
return false;
}
public bool TrySetCanceled(OperationCanceledException exception)
{
if (Interlocked.CompareExchange(ref state, Canceled, Pending) == Pending)
{
this.exception = new ExceptionHolder(ExceptionDispatchInfo.Capture(exception));
TryInvokeContinuation();
return true;
}
return false;
}
void INotifyCompletion.OnCompleted(Action continuation)
{
((ICriticalNotifyCompletion)this).UnsafeOnCompleted(continuation);
}
}
public class UniTaskCompletionSource<T> : IAwaiter<T>, IPromise<T>
{
// State(= AwaiterStatus)
const int Pending = 0;
const int Succeeded = 1;
const int Faulted = 2;
const int Canceled = 3;
int state = 0;
T value;
bool handled = false;
ExceptionHolder exception;
object continuation; // action or list
bool IAwaiter.IsCompleted => state != Pending;
public UniTask<T> Task => new UniTask<T>(this);
public UniTask UnitTask => new UniTask(this);
AwaiterStatus IAwaiter.Status => (AwaiterStatus)state;
public UniTaskCompletionSource()
{
TaskTracker.TrackActiveTask(this, 2);
}
[Conditional("UNITY_EDITOR")]
internal void MarkHandled()
{
if (!handled)
{
handled = true;
TaskTracker.RemoveTracking(this);
}
}
T IAwaiter<T>.GetResult()
{
MarkHandled();
if (state == Succeeded)
{
return value;
}
else if (state == Faulted)
{
exception.GetException().Throw();
}
else if (state == Canceled)
{
if (exception != null)
{
exception.GetException().Throw(); // guranteed operation canceled exception.
}
throw new OperationCanceledException();
}
else // Pending
{
throw new NotSupportedException("UniTask does not allow call GetResult directly when task not completed. Please use 'await'.");
}
return default(T);
}
void ICriticalNotifyCompletion.UnsafeOnCompleted(Action action)
{
if (Interlocked.CompareExchange(ref continuation, (object)action, null) == null)
{
if (state != Pending)
{
TryInvokeContinuation();
}
}
else
{
var c = continuation;
if (c is Action)
{
var list = new List<Action>();
list.Add((Action)c);
list.Add(action);
if (Interlocked.CompareExchange(ref continuation, list, c) == c)
{
goto TRYINVOKE;
}
}
var l = (List<Action>)continuation;
lock (l)
{
l.Add(action);
}
TRYINVOKE:
if (state != Pending)
{
TryInvokeContinuation();
}
}
}
void TryInvokeContinuation()
{
var c = Interlocked.Exchange(ref continuation, null);
if (c != null)
{
if (c is Action)
{
((Action)c).Invoke();
}
else
{
var l = (List<Action>)c;
var cnt = l.Count;
for (int i = 0; i < cnt; i++)
{
l[i].Invoke();
}
}
}
}
public bool TrySetResult(T value)
{
if (Interlocked.CompareExchange(ref state, Succeeded, Pending) == Pending)
{
this.value = value;
TryInvokeContinuation();
return true;
}
return false;
}
public bool TrySetException(Exception exception)
{
if (Interlocked.CompareExchange(ref state, Faulted, Pending) == Pending)
{
this.exception = new ExceptionHolder(ExceptionDispatchInfo.Capture(exception));
TryInvokeContinuation();
return true;
}
return false;
}
public bool TrySetCanceled()
{
if (Interlocked.CompareExchange(ref state, Canceled, Pending) == Pending)
{
TryInvokeContinuation();
return true;
}
return false;
}
public bool TrySetCanceled(OperationCanceledException exception)
{
if (Interlocked.CompareExchange(ref state, Canceled, Pending) == Pending)
{
this.exception = new ExceptionHolder(ExceptionDispatchInfo.Capture(exception));
TryInvokeContinuation();
return true;
}
return false;
}
void IAwaiter.GetResult()
{
((IAwaiter<T>)this).GetResult();
}
void INotifyCompletion.OnCompleted(Action continuation)
{
((ICriticalNotifyCompletion)this).UnsafeOnCompleted(continuation);
}
}
}
#endif