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96 lines
3.3 KiB
96 lines
3.3 KiB
5 years ago
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#if NET20 || NET30 || NET35 || !NET_4_6
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using System.Diagnostics.Contracts;
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namespace System.Threading.Tasks
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{
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public partial class Task<TResult> : Task
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{
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internal TResult InternalResult;
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static Task()
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{
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ContinuationConvertion = done => (Task<TResult>)done.Result;
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}
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public Task(Func<TResult> function)
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: base(function, null, null, default(CancellationToken), TaskCreationOptions.None, InternalTaskOptions.None, TaskScheduler.Default)
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{
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// Empty
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}
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public Task(Func<TResult> function, CancellationToken cancellationToken)
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: base(function, null, null, cancellationToken, TaskCreationOptions.None, InternalTaskOptions.None, TaskScheduler.Default)
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{
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// Empty
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}
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public Task(Func<TResult> function, TaskCreationOptions creationOptions)
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: base(function, null, null, default(CancellationToken), creationOptions, InternalTaskOptions.None, TaskScheduler.Default)
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{
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// Empty
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}
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public Task(Func<TResult> function, CancellationToken cancellationToken, TaskCreationOptions creationOptions)
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: base(function, null, null, cancellationToken, creationOptions, InternalTaskOptions.None, TaskScheduler.Default)
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{
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// Empty
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}
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internal Task(Func<TResult> function, CancellationToken cancellationToken, TaskCreationOptions creationOptions, TaskScheduler scheduler)
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: base(function, null, null, cancellationToken, creationOptions, InternalTaskOptions.None, scheduler)
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{
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// Empty
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}
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internal Task(Func<object, TResult> function, object state, CancellationToken cancellationToken, TaskCreationOptions creationOptions, TaskScheduler scheduler)
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: base(function, state, null, cancellationToken, creationOptions, InternalTaskOptions.None, scheduler)
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{
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// Empty
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}
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internal Task(Delegate function, object state, Task parent, CancellationToken cancellationToken, TaskCreationOptions creationOptions, InternalTaskOptions internalOptions, TaskScheduler scheduler)
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: base(function, state, parent, cancellationToken, creationOptions, internalOptions, scheduler)
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{
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// Empty
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}
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public TResult Result
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{
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get
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{
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Wait();
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if (IsFaulted)
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{
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throw Exception;
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}
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if (IsCanceled)
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{
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throw new AggregateException(new TaskCanceledException(this));
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}
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return InternalResult;
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}
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}
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internal static Func<Task<Task>, Task<TResult>> ContinuationConvertion { get; private set; }
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internal override void InnerInvoke()
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{
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var action = Action as Func<TResult>;
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if (action != null)
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{
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InternalResult = action();
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return;
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}
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var withState = Action as Func<object, TResult>;
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if (withState != null)
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{
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InternalResult = withState(State);
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return;
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}
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Contract.Assert(false, "Invalid Action in Task");
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}
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}
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}
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#endif
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