具有无限while循环的异步任务之间的C＃同步？

Question

I have one async task running an infinite loop doing some realtime processing:

private async void RealTimeProcessingAsync()
{
    while (true)
    {
        //....
       Tmstaus  status = await ReadStatusAsync();
       switch (status)
       {
            case Ack:
            //...
            break;
            //...
        }
        //...
    }
}

And I created another async method SendWriteRqst that post command to RealTimeProcessingAsync(), should wait for status to set to defined condition and return.

public async Task<WriteState> SendWriteRqstAsync(TmCommand tmCmd)
{
    //...
    await SomeCondition()//based on status value
    //...
    return wrState;
}

It will works if SomeCondition() runs another while loop to polling status and return true if conditions set, but I'm looking for better solution.

(Sorry for bad English)

Answer 1

It will works if SomeCondition() runs another while loop to polling status and return true if conditions set , but I'm looking for better solution.

What you want is a signal instead of a polling loop. If you only need to set the signal once, you can use TaskCompletionSource<T> . If you want a signal that can be set and reset (without having to be reconstructed), then you can use AsyncManualResetEvent (also available from NuGet in my AsyncEx.Coordination library ).