118 lines
4.5 KiB
C#
118 lines
4.5 KiB
C#
// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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using System;
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using System.ComponentModel;
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using System.Runtime.CompilerServices;
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using System.Threading.Tasks;
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namespace CommunityToolkit.Mvvm.ComponentModel.__Internals;
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/// <summary>
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/// An internal helper used to support <see cref="ObservableObject"/> and generated code from its template.
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/// This type is not intended to be used directly by user code.
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/// </summary>
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[EditorBrowsable(EditorBrowsableState.Never)]
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[Obsolete("This type is not intended to be used directly by user code")]
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public static class __TaskExtensions
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{
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/// <summary>
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/// Gets an awaitable object that skips end validation.
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/// </summary>
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/// <param name="task">The input <see cref="Task"/> to get the awaitable for.</param>
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/// <returns>A <see cref="TaskAwaitableWithoutEndValidation"/> object wrapping <paramref name="task"/>.</returns>
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[EditorBrowsable(EditorBrowsableState.Never)]
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[Obsolete("This method is not intended to be called directly by user code")]
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public static TaskAwaitableWithoutEndValidation GetAwaitableWithoutEndValidation(this Task task)
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{
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return new(task);
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}
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/// <summary>
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/// A custom task awaitable object that skips end validation.
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/// </summary>
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[EditorBrowsable(EditorBrowsableState.Never)]
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[Obsolete("This type is not intended to be called directly by user code")]
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public readonly struct TaskAwaitableWithoutEndValidation
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{
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/// <summary>
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/// The wrapped <see cref="Task"/> instance to create an awaiter for.
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/// </summary>
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private readonly Task task;
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/// <summary>
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/// Creates a new <see cref="TaskAwaitableWithoutEndValidation"/> instance with the specified parameters.
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/// </summary>
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/// <param name="task">The wrapped <see cref="Task"/> instance to create an awaiter for.</param>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public TaskAwaitableWithoutEndValidation(Task task)
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{
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this.task = task;
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}
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/// <summary>
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/// Gets an <see cref="Awaiter"/> instance for the current underlying task.
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/// </summary>
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/// <returns>An <see cref="Awaiter"/> instance for the current underlying task.</returns>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public Awaiter GetAwaiter()
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{
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return new(this.task);
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}
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/// <summary>
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/// An awaiter object for <see cref="TaskAwaitableWithoutEndValidation"/>.
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/// </summary>
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public readonly struct Awaiter : ICriticalNotifyCompletion
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{
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/// <summary>
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/// The underlying <see cref="TaskAwaiter"/> instance.
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/// </summary>
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private readonly TaskAwaiter taskAwaiter;
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/// <summary>
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/// Creates a new <see cref="Awaiter"/> instance with the specified parameters.
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/// </summary>
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/// <param name="task">The wrapped <see cref="Task"/> instance to create an awaiter for.</param>
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public Awaiter(Task task)
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{
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this.taskAwaiter = task.GetAwaiter();
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}
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/// <summary>
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/// Gets whether the operation has completed or not.
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/// </summary>
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/// <remarks>This property is intended for compiler user rather than use directly in code.</remarks>
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public bool IsCompleted
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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get => this.taskAwaiter.IsCompleted;
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}
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/// <summary>
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/// Ends the await operation.
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/// </summary>
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/// <remarks>This method is intended for compiler user rather than use directly in code.</remarks>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void GetResult()
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{
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}
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/// <inheritdoc/>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void OnCompleted(Action continuation)
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{
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this.taskAwaiter.OnCompleted(continuation);
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}
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/// <inheritdoc/>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void UnsafeOnCompleted(Action continuation)
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{
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this.taskAwaiter.UnsafeOnCompleted(continuation);
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}
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}
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}
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}
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