/// <summary>
/// Attempts to complete a <see cref="TaskCompletionSource{TResult}"/> with the specified value, forcing all continuations onto a threadpool thread even if they specified <c>ExecuteSynchronously</c>.
/// </summary>
/// <typeparam name="TResult">The type of the result of the asynchronous operation.</typeparam>
/// <param name="this">The task completion source. May not be <c>null</c>.</param>
/// <param name="result">The result of the asynchronous operation.</param>
public static void TrySetResultWithBackgroundContinuations <TResult>(this TaskCompletionSource <TResult> @this, TResult result)
{
// Set the result on a threadpool thread, so any synchronous continuations will execute in the background.
TaskShim.Run(() => @this.TrySetResult(result));
// Wait for the TCS task to complete; note that the continuations may not be complete.
@this.Task.Wait();
}
/// <summary>
/// Attempts to complete a <see cref="TaskCompletionSource"/> as faulted, forcing all continuations onto a threadpool thread even if they specified <c>ExecuteSynchronously</c>.
/// </summary>
/// <param name="this">The task completion source. May not be <c>null</c>.</param>
/// <param name="exceptions">The exceptions to bind to the task.</param>
public static void TrySetExceptionWithBackgroundContinuations(this TaskCompletionSource @this, IEnumerable <Exception> exceptions)
{
// Set the result on a threadpool thread, so any synchronous continuations will execute in the background.
TaskShim.Run(() => @this.TrySetException(exceptions));
// Wait for the TCS task to complete; note that the continuations may not be complete.
try
{
@this.Task.Wait();
}
catch (AggregateException)
{
}
}
/// <summary>
/// Attempts to complete a <see cref="TaskCompletionSource{TResult}"/> as canceled, forcing all continuations onto a threadpool thread even if they specified <c>ExecuteSynchronously</c>.
/// </summary>
/// <typeparam name="TResult">The type of the result of the asynchronous operation.</typeparam>
/// <param name="this">The task completion source. May not be <c>null</c>.</param>
public static void TrySetCanceledWithBackgroundContinuations <TResult>(this TaskCompletionSource <TResult> @this)
{
// Complete on a threadpool thread, so any synchronous continuations will execute in the background.
TaskShim.Run(() => @this.TrySetCanceled());
// Wait for the TCS task to complete; note that the continuations may not be complete.
try
{
@this.Task.Wait();
}
catch (AggregateException)
{
}
}