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UniTask.Delay.cs
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UniTask.Delay.cs
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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.Runtime.CompilerServices;
using System.Threading;
using UniRx.Async.Internal;
using UnityEngine;
namespace UniRx.Async
{
public partial struct UniTask
{
public static YieldAwaitable Yield(PlayerLoopTiming timing = PlayerLoopTiming.Update)
{
// optimized for single continuation
return new YieldAwaitable(timing);
}
public static UniTask Yield(PlayerLoopTiming timing, CancellationToken cancellationToken)
{
return new UniTask(new YieldPromise(timing, cancellationToken));
}
public static UniTask<int> DelayFrame(int delayFrameCount, PlayerLoopTiming delayTiming = PlayerLoopTiming.Update, CancellationToken cancellationToken = default(CancellationToken))
{
if (delayFrameCount < 0)
{
throw new ArgumentOutOfRangeException("Delay does not allow minus delayFrameCount. delayFrameCount:" + delayFrameCount);
}
var source = new DelayFramePromise(delayFrameCount, delayTiming, cancellationToken);
return source.Task;
}
public static UniTask Delay(int millisecondsDelay, bool ignoreTimeScale = false, PlayerLoopTiming delayTiming = PlayerLoopTiming.Update, CancellationToken cancellationToken = default(CancellationToken))
{
var delayTimeSpan = TimeSpan.FromMilliseconds(millisecondsDelay);
if (delayTimeSpan < TimeSpan.Zero)
{
throw new ArgumentOutOfRangeException("Delay does not allow minus delayFrameCount. delayTimeSpan:" + delayTimeSpan);
}
return (ignoreTimeScale)
? new DelayIgnoreTimeScalePromise(delayTimeSpan, delayTiming, cancellationToken).Task
: new DelayPromise(delayTimeSpan, delayTiming, cancellationToken).Task;
}
public static UniTask Delay(TimeSpan delayTimeSpan, bool ignoreTimeScale = false, PlayerLoopTiming delayTiming = PlayerLoopTiming.Update, CancellationToken cancellationToken = default(CancellationToken))
{
if (delayTimeSpan < TimeSpan.Zero)
{
throw new ArgumentOutOfRangeException("Delay does not allow minus delayFrameCount. delayTimeSpan:" + delayTimeSpan);
}
return (ignoreTimeScale)
? new DelayIgnoreTimeScalePromise(delayTimeSpan, delayTiming, cancellationToken).Task
: new DelayPromise(delayTimeSpan, delayTiming, cancellationToken).Task;
}
class YieldPromise : PlayerLoopReusablePromiseBase
{
public YieldPromise(PlayerLoopTiming timing, CancellationToken cancellationToken)
: base(timing, cancellationToken, 2)
{
}
protected override void OnRunningStart()
{
}
public override bool MoveNext()
{
Complete();
if (cancellationToken.IsCancellationRequested)
{
TrySetCanceled();
}
else
{
TrySetResult();
}
return false;
}
}
class DelayFramePromise : PlayerLoopReusablePromiseBase<int>
{
readonly int delayFrameCount;
int currentFrameCount;
public DelayFramePromise(int delayFrameCount, PlayerLoopTiming timing, CancellationToken cancellationToken)
: base(timing, cancellationToken, 2)
{
this.delayFrameCount = delayFrameCount;
this.currentFrameCount = 0;
}
protected override void OnRunningStart()
{
currentFrameCount = 0;
}
public override bool MoveNext()
{
if (cancellationToken.IsCancellationRequested)
{
Complete();
TrySetCanceled();
return false;
}
if (currentFrameCount == delayFrameCount)
{
Complete();
TrySetResult(currentFrameCount);
return false;
}
currentFrameCount++;
return true;
}
}
class DelayPromise : PlayerLoopReusablePromiseBase
{
readonly float delayFrameTimeSpan;
float elapsed;
public DelayPromise(TimeSpan delayFrameTimeSpan, PlayerLoopTiming timing, CancellationToken cancellationToken)
: base(timing, cancellationToken, 2)
{
this.delayFrameTimeSpan = (float)delayFrameTimeSpan.TotalSeconds;
}
protected override void OnRunningStart()
{
this.elapsed = 0.0f;
}
public override bool MoveNext()
{
if (cancellationToken.IsCancellationRequested)
{
Complete();
TrySetCanceled();
return false;
}
elapsed += Time.deltaTime;
if (elapsed >= delayFrameTimeSpan)
{
Complete();
TrySetResult();
return false;
}
return true;
}
}
class DelayIgnoreTimeScalePromise : PlayerLoopReusablePromiseBase
{
readonly float delayFrameTimeSpan;
float elapsed;
public DelayIgnoreTimeScalePromise(TimeSpan delayFrameTimeSpan, PlayerLoopTiming timing, CancellationToken cancellationToken)
: base(timing, cancellationToken, 2)
{
this.delayFrameTimeSpan = (float)delayFrameTimeSpan.TotalSeconds;
}
protected override void OnRunningStart()
{
this.elapsed = 0.0f;
}
public override bool MoveNext()
{
if (cancellationToken.IsCancellationRequested)
{
Complete();
TrySetCanceled();
return false;
}
elapsed += Time.unscaledDeltaTime;
if (elapsed >= delayFrameTimeSpan)
{
Complete();
TrySetResult();
return false;
}
return true;
}
}
}
public struct YieldAwaitable
{
readonly PlayerLoopTiming timing;
public YieldAwaitable(PlayerLoopTiming timing)
{
this.timing = timing;
}
public Awaiter GetAwaiter()
{
return new Awaiter(timing);
}
public UniTask ToUniTask()
{
return UniTask.Yield(timing, CancellationToken.None);
}
public struct Awaiter : ICriticalNotifyCompletion
{
readonly PlayerLoopTiming timing;
public Awaiter(PlayerLoopTiming timing)
{
this.timing = timing;
}
public bool IsCompleted => false;
public void GetResult() { }
public void OnCompleted(Action continuation)
{
PlayerLoopHelper.AddContinuation(timing, continuation);
}
public void UnsafeOnCompleted(Action continuation)
{
PlayerLoopHelper.AddContinuation(timing, continuation);
}
}
}
}
#endif