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Tyrrrz merged 9 commits into from
Dec 2, 2025
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Add polyfills for Task.Run(...), Task.WhenAny(...) and Task.WhenAll(...) #62

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Add polyfills for `Task.Run(...)`, `Task.WhenAny(...)` and `Task.When…
Tyrrrz Dec 2, 2025
2d5f182
Update PolyShim/NetCore10/Task.cs
Tyrrrz Dec 2, 2025
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Update PolyShim/NetCore10/Task.cs
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Update PolyShim/NetCore10/Task.cs
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112 changes: 112 additions & 0 deletions PolyShim/NetCore10/Task.cs
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Expand Up @@ -6,6 +6,10 @@
// ReSharper disable InconsistentNaming
// ReSharper disable PartialTypeWithSinglePart

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

internal static partial class PolyfillExtensions
Expand All @@ -26,6 +30,114 @@ internal static partial class PolyfillExtensions

return tcs.Task;
}

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run(system-action-system-threading-cancellationtoken)
public static Task Run(Action action, CancellationToken cancellationToken) =>
Task.Factory.StartNew(
action,
cancellationToken,
TaskCreationOptions.None,
TaskScheduler.Default
);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run(system-action)
public static Task Run(Action action) => Task.Run(action, CancellationToken.None);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run(system-func((system-threading-tasks-task))-system-threading-cancellationtoken)
public static Task Run(Func<Task> function, CancellationToken cancellationToken) =>
Task
.Factory.StartNew(
function,
cancellationToken,
TaskCreationOptions.None,
TaskScheduler.Default
)
.Unwrap();

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run(system-func((system-threading-tasks-task)))
public static Task Run(Func<Task> function) => Task.Run(function, CancellationToken.None);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run-1(system-func((-0))-system-threading-cancellationtoken)
public static Task<T> Run<T>(Func<T> function, CancellationToken cancellationToken) =>
Task.Factory.StartNew(
function,
cancellationToken,
TaskCreationOptions.None,
TaskScheduler.Default
);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run-1(system-func((-0)))
public static Task<T> Run<T>(Func<T> function) =>
Task.Run(function, CancellationToken.None);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run-1(system-func((system-threading-tasks-task((-0))))-system-threading-cancellationtoken)
public static Task<T> Run<T>(Func<Task<T>> function, CancellationToken cancellationToken) =>
Task
.Factory.StartNew(
function,
cancellationToken,
TaskCreationOptions.None,
TaskScheduler.Default
)
.Unwrap();

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run-1(system-func((system-threading-tasks-task((-0)))))
public static Task<T> Run<T>(Func<Task<T>> function) =>
Task.Run(function, CancellationToken.None);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenall#system-threading-tasks-task-whenall(system-collections-generic-ienumerable((system-threading-tasks-task)))
public static Task WhenAll(IEnumerable<Task> tasks) =>
Task.Factory.ContinueWhenAll(
tasks as Task[] ?? tasks.ToArray(),
_ => { },
CancellationToken.None,
TaskContinuationOptions.OnlyOnRanToCompletion,
TaskScheduler.Default
);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenall#system-threading-tasks-task-whenall(system-threading-tasks-task())
public static Task WhenAll(params Task[] tasks) => WhenAll((IEnumerable<Task>)tasks);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenall#system-threading-tasks-task-whenall-1(system-collections-generic-ienumerable((system-threading-tasks-task((-0)))))
public static Task<T[]> WhenAll<T>(IEnumerable<Task<T>> tasks) =>
Task.Factory.ContinueWhenAll(
tasks as Task<T>[] ?? tasks.ToArray(),
completedTasks => completedTasks.Select(t => t.GetAwaiter().GetResult()).ToArray(),
CancellationToken.None,
TaskContinuationOptions.OnlyOnRanToCompletion,
TaskScheduler.Default
);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenall#system-threading-tasks-task-whenall-1(system-threading-tasks-task((-0))())
public static Task<T[]> WhenAll<T>(params Task<T>[] tasks) =>
WhenAll((IEnumerable<Task<T>>)tasks);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenany#system-threading-tasks-task-whenany(system-collections-generic-ienumerable((system-threading-tasks-task)))
public static Task<Task> WhenAny(IEnumerable<Task> tasks) =>
Task.Factory.ContinueWhenAny(
tasks as Task[] ?? tasks.ToArray(),
t => t,
CancellationToken.None,
TaskContinuationOptions.None,
TaskScheduler.Default
);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenany#system-threading-tasks-task-whenany(system-threading-tasks-task())
public static Task<Task> WhenAny(params Task[] tasks) => WhenAny((IEnumerable<Task>)tasks);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenany#system-threading-tasks-task-whenany-1(system-collections-generic-ienumerable((system-threading-tasks-task((-0)))))
public static Task<Task<T>> WhenAny<T>(IEnumerable<Task<T>> tasks) =>
Task.Factory.ContinueWhenAny(
tasks as Task<T>[] ?? tasks.ToArray(),
t => t,
CancellationToken.None,
TaskContinuationOptions.None,
TaskScheduler.Default
);

// https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenany#system-threading-tasks-task-whenany-1(system-threading-tasks-task((-0))())
public static Task<Task<T>> WhenAny<T>(params Task<T>[] tasks) =>
WhenAny((IEnumerable<Task<T>>)tasks);
#endif
}
}
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20 changes: 18 additions & 2 deletions PolyShim/Signatures.md
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@@ -1,8 +1,8 @@
# Signatures

- **Total:** 275
- **Total:** 291
- **Types:** 62
- **Members:** 213
- **Members:** 229

___

Expand Down Expand Up @@ -335,10 +335,26 @@ ___
- [`IAsyncEnumerable<Task> WhenEach(IEnumerable<Task>)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.wheneach#system-threading-tasks-task-wheneach(system-collections-generic-ienumerable((system-threading-tasks-task)))) <sup><sub>.NET 9.0</sub></sup>
- [`IAsyncEnumerable<Task> WhenEach(params Task[])`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.wheneach#system-threading-tasks-task-wheneach(system-threading-tasks-task())) <sup><sub>.NET 9.0</sub></sup>
- [`Task CompletedTask`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.completedtask) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task Run(Action, CancellationToken)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run(system-action-system-threading-cancellationtoken)) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task Run(Action)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run(system-action)) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task Run(Func<Task>, CancellationToken)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run(system-func((system-threading-tasks-task))-system-threading-cancellationtoken)) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task Run(Func<Task>)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run(system-func((system-threading-tasks-task)))) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task WaitAsync(CancellationToken)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.waitasync#system-threading-tasks-task-waitasync(system-threading-cancellationtoken)) <sup><sub>.NET 6.0</sub></sup>
- [`Task WaitAsync(TimeSpan, CancellationToken)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.waitasync#system-threading-tasks-task-waitasync(system-timespan-system-threading-cancellationtoken)) <sup><sub>.NET 6.0</sub></sup>
- [`Task WaitAsync(TimeSpan)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.waitasync#system-threading-tasks-task-waitasync(system-timespan)) <sup><sub>.NET 6.0</sub></sup>
- [`Task WhenAll(IEnumerable<Task>)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenall#system-threading-tasks-task-whenall(system-collections-generic-ienumerable((system-threading-tasks-task)))) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task WhenAll(params Task[])`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenall#system-threading-tasks-task-whenall(system-threading-tasks-task())) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task<T?> FromResult<T>(T?)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.fromresult) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task<T[]> WhenAll<T>(IEnumerable<Task<T>>)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenall#system-threading-tasks-task-whenall-1(system-collections-generic-ienumerable((system-threading-tasks-task((-0)))))) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task<T[]> WhenAll<T>(params Task<T>[])`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenall#system-threading-tasks-task-whenall-1(system-threading-tasks-task((-0))())) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task<T> Run<T>(Func<T>, CancellationToken)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run-1(system-func((-0))-system-threading-cancellationtoken)) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task<T> Run<T>(Func<T>)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run-1(system-func((-0)))) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task<T> Run<T>(Func<Task<T>>, CancellationToken)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run-1(system-func((system-threading-tasks-task((-0))))-system-threading-cancellationtoken)) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task<T> Run<T>(Func<Task<T>>)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.run#system-threading-tasks-task-run-1(system-func((system-threading-tasks-task((-0)))))) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task<Task<T>> WhenAny<T>(IEnumerable<Task<T>>)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenany#system-threading-tasks-task-whenany-1(system-collections-generic-ienumerable((system-threading-tasks-task((-0)))))) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task<Task<T>> WhenAny<T>(params Task<T>[])`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenany#system-threading-tasks-task-whenany-1(system-threading-tasks-task((-0))())) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task<Task> WhenAny(IEnumerable<Task>)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenany#system-threading-tasks-task-whenany(system-collections-generic-ienumerable((system-threading-tasks-task)))) <sup><sub>.NET Core 1.0</sub></sup>
- [`Task<Task> WhenAny(params Task[])`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task.whenany#system-threading-tasks-task-whenany(system-threading-tasks-task())) <sup><sub>.NET Core 1.0</sub></sup>
- `Task<T>`
- [`Task<T> WaitAsync(CancellationToken)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task-1.waitasync#system-threading-tasks-task-1-waitasync(system-threading-cancellationtoken)) <sup><sub>.NET 6.0</sub></sup>
- [`Task<T> WaitAsync(TimeSpan, CancellationToken)`](https://learn.microsoft.com/dotnet/api/system.threading.tasks.task-1.waitasync#system-threading-tasks-task-1-waitasync(system-timespan-system-threading-cancellationtoken)) <sup><sub>.NET 6.0</sub></sup>
Expand Down
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