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In .NET Core, IUniTaskSource implements IValueTaskSource and implicit, zero overhead conversion

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neuecc
2020-05-24 00:18:39 +09:00
parent f3e3ba8864
commit 51ba740413
5 changed files with 115 additions and 111 deletions
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112
src/UniTask.NetCore/NetCore/UniTask.AsValueTask.cs
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@@ -1,123 +1,19 @@
#pragma warning disable 0649
using System;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;
using System.Threading.Tasks.Sources;
namespace Cysharp.Threading.Tasks
{
public static class UniTaskValueTaskExtensions
{
public static ValueTask AsValueTask(this UniTask task)
public static ValueTask AsValueTask(this in UniTask task)
{
ref var core = ref Unsafe.As<UniTask, UniTaskToValueTask>(ref task);
if (core.source == null)
{
return default;
}
return new ValueTask(new UniTaskValueTaskSource(core.source), core.token);
return task;
}
public static ValueTask<T> AsValueTask<T>(this UniTask<T> task)
public static ValueTask<T> AsValueTask<T>(this in UniTask<T> task)
{
ref var core = ref Unsafe.As<UniTask<T>, UniTaskToValueTask<T>>(ref task);
if (core.source == null)
{
return new ValueTask<T>(core.result);
}
return new ValueTask<T>(new UniTaskValueTaskSource<T>(core.source), core.token);
}
struct UniTaskToValueTask
{
public IUniTaskSource source;
public short token;
}
class UniTaskValueTaskSource : IValueTaskSource
{
readonly IUniTaskSource source;
public UniTaskValueTaskSource(IUniTaskSource source)
{
this.source = source;
}
public void GetResult(short token)
{
source.GetResult(token);
}
public ValueTaskSourceStatus GetStatus(short token)
{
var status = source.GetStatus(token);
switch (status)
{
case UniTaskStatus.Pending:
return ValueTaskSourceStatus.Pending;
case UniTaskStatus.Succeeded:
return ValueTaskSourceStatus.Succeeded;
case UniTaskStatus.Faulted:
return ValueTaskSourceStatus.Faulted;
case UniTaskStatus.Canceled:
return ValueTaskSourceStatus.Canceled;
default:
return (ValueTaskSourceStatus)status;
}
}
public void OnCompleted(Action<object> continuation, object state, short token, ValueTaskSourceOnCompletedFlags flags)
{
source.OnCompleted(continuation, state, token);
}
}
struct UniTaskToValueTask<T>
{
public IUniTaskSource<T> source;
public T result;
public short token;
}
class UniTaskValueTaskSource<T> : IValueTaskSource<T>
{
readonly IUniTaskSource<T> source;
public UniTaskValueTaskSource(IUniTaskSource<T> source)
{
this.source = source;
}
public T GetResult(short token)
{
return source.GetResult(token);
}
public ValueTaskSourceStatus GetStatus(short token)
{
var status = source.GetStatus(token);
switch (status)
{
case UniTaskStatus.Pending:
return ValueTaskSourceStatus.Pending;
case UniTaskStatus.Succeeded:
return ValueTaskSourceStatus.Succeeded;
case UniTaskStatus.Faulted:
return ValueTaskSourceStatus.Faulted;
case UniTaskStatus.Canceled:
return ValueTaskSourceStatus.Canceled;
default:
return (ValueTaskSourceStatus)status;
}
}
public void OnCompleted(Action<object> continuation, object state, short token, ValueTaskSourceOnCompletedFlags flags)
{
source.OnCompleted(continuation, state, token);
}
return task;
}
}
}

3
src/UniTask.NetCore/UniTask.NetCore.csproj
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@@ -1,8 +1,9 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netstandard2.0</TargetFramework>
<TargetFramework>netstandard2.1</TargetFramework>
<AssemblyName>UniTask</AssemblyName>
<LangVersion>8.0</LangVersion>
<RootNamespace>Cysharp.Threading.Tasks</RootNamespace>
</PropertyGroup>