public void RechargeableCompletionSourceThrowsErrorOnGetValueAsync(bool runContinuationsAsynchronously)
{
// Arrange
var rcs = new RechargeableCompletionSource <object>(runContinuationsAsynchronously);
// Act
var t1 = rcs.GetValueAsync();
var t2 = rcs.GetValueAsync();
// Assert
t1.IsFaulted.Should().BeFalse();
t2.IsFaulted.Should().BeTrue();
}
public async Task RechargeableCompletionSourceBlocksSetAwaitAfter(bool runContinuationsAsynchronously)
{
// Arrange
var rcs = new RechargeableCompletionSource <object>(runContinuationsAsynchronously);
var tFinishCheck = new TaskCompletionSource();
// Act
var t = Task.Run(() => rcs.SetResultAndWait(null !));
_ = t.ContinueWith(_ => tFinishCheck.SetResult(), TaskContinuationOptions.ExecuteSynchronously);
await Task.Delay(1_000); // Attempts to ensure that task t never completes.
// Assert
t.IsCompleted.Should().BeFalse();
var result = await rcs.GetValueAsync();
t.IsCompleted.Should().BeFalse();
result.Dispose();
await tFinishCheck.Task;
t.IsCompleted.Should().BeTrue();
}
static async Task RechargeableCompletionSourceExampleAsync()
{
var runContinuationsAsynchronously = false;
var rtcs = new RechargeableCompletionSource <int>(runContinuationsAsynchronously);
var t1 = Task.Run(async() =>
{
while (true)
{
using var data = await rtcs.GetValueAsync().ConfigureAwait(false);
Console.WriteLine($"Get {data.Value} on Thread {Environment.CurrentManagedThreadId}");
}
});
Thread.Sleep(1000);
var t2 = Task.Run(() =>
{
int i = 0;
while (true)
{
Thread.Sleep(1_000);
Console.WriteLine($"Add {i} on Thread {Environment.CurrentManagedThreadId}");
rtcs.SetResultAndWait(i++);
}
});
await Task.WhenAll(t1, t2).ConfigureAwait(false);
}