CODEWITHSUNDEEP
c#unity-game-engineasynchronousasync-await
piojo
piojo

Reputation: 6723

Async timeout: Task.WhenAny() when I have Awaiter rather than Task

I'm somewhat new to async C#, and I'm dealing with a class which has an Awaiter but no Task. (It's Unity 3D's WWW class, and I'm using these extension classes to provide WWW.GetAwaiter().)

I want to impose a timeout for the await, after which I'll continue the function's logic, taking a different code path because I'll know the awaiter took too long. The intuitive solution is:

Task timeout = Task.Delay(20*1000);
await Task.WhenAny(wwwTask, timeout);
bool timedOut = !wwwTask.IsCompleted;

Since WWW is a custom class (with GetAwaiter()) and not a task, I need to make a task for this to work. Is making a helper function the right way to get a task for that object?

private async Task<WWW> SendRequestAsync(WWW www)
{
    return await www;
}

And to get the task:

Task wwwTask = SendRequestAsync(www);

Is this timeout logic sound, and is it the easiest way to work with Tasks when there is only an awaiter?

Upvotes: 0

Views: 532

Answers (1)

Kh&#244;ng C&#243; T&#234;n
Kh&#244;ng C&#243; T&#234;n

Reputation: 11

To return a task with generic change your code:

private async Task<WWW> SendRequestAsync(WWW www)
{
    return await www;
}

to

private async Task<WWW> SendRequestAsync(WWW www)
{
    return Task.FromResult(www);
}

Upvotes: 1

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