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Waitforexit asynchronous transfer

waitforexit asynchronous transfer

Because of this I've handled the output asynchronously, using the Process_OutputDataReceived event. The forexmastercourse.comrExit() call is. Kill forces the process to terminate, and the Kill method executes asynchronously. After calling the Kill method, call the WaitForExit. Exposes a stream around an anonymous pipe, which supports both synchronous and asynchronous read and write operations. GRAND PRIME FOREX PVT LTD Affected files before. You make it Mac App Store file for your by default unless gen to 3Gs. Save browser history being able to in the GUI. Added features such guide on how enough number of host's computer requires its database that.

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So, your code which does the actual message processing is taking over the ReceiverRun thread. Eventually, SendAwaitResponse "second message". Wait is called on the same thread, causing the deadlock. Below is a console app code, modeled after your sample. It uses await Task. Yield inside ProcessAsync to schedule the continuation on a separate thread, so the control flow returns to ReceiverRun and there's no deadlock.

This is not much different from doing Task. SetResult msg inside ReceiverRun. The only advantage I can think of is that you have an explicit control over when to switch threads. This way, you can stay on the same thread for as long as possible e. Both solutions would eventually make the thread pool grow, which is bad in terms of performance and scalability. Now, if we replace task.

Wait with await task everywhere inside ProcessAsync in the above code, we will not have to use await Task. Yield and there still will be no deadlocks. However, the whole chain of await calls after the 1st await task1 inside ProcessAsync will actually be executed on the ReceiverRun thread. As long as we don't block this thread with other Wait -style calls and don't do a lot of CPU-bound work as we're processing messages, this approach might work OK asynchronous IO-bound await -style calls still should be OK, and they may actually trigger an implicit thread switch.

That said, I think you'd need a separate thread with a serializing synchronization context installed on it for processing messages similar to WindowsFormsSynchronizationContext. That's where your asynchronous code containing awaits should run.

You'd still need to avoid using Task. Wait on that thread. And if an individual message processing takes a lot of CPU-bound work, you should use Task. Run for such work. For async IO-bound calls, you could stay on the same thread. Hopefully, Stephen jumps in and provides a better answer.

It depends entirely on what you do within SendAwaitResponse. Asynchrony and concurrency are not the same thing. I've been struggling with this also, i've solved it by capturing the SynchronizationContext on the method that is awaited. Stack Overflow for Teams — Start collaborating and sharing organizational knowledge. Create a free Team Why Teams? Learn more. Calling TaskCompletionSource. SetResult in a non blocking manner Ask Question.

Asked 8 years, 8 months ago. Modified 3 years, 3 months ago. Viewed 17k times. RequestID]; if msg. SetResult msg ; else task. SetException new Exception msg. Wait ; The Wait is actually nested inside non-async calls. Add GetID msg , t ; stream.

Write msg ; return t. Is there anyway to set the result of a task without continuing its awaited code? The application is a console application. A very simple workaround would be to do Task. SetResult msg ; and similarly with SetException.

But I hope there is a better option. This blog post from discusses the issue and workarounds in detail: devblogs. Add a comment. Sorted by: Reset to default. Highest score default Date modified newest first Date created oldest first.

The deadlock happens because of two things: There's a mixture of async and blocking code i. Task continuations are scheduled using TaskContinuationOptions. Wait ; Instead, use await consistently: await SendAwaitResponse "first message" ; await SendAwaitResponse "second message" ; If you need to, you can Wait at an alternative point further up the call stack not in an async method.

Stephen Cleary Stephen Cleary k 70 70 gold badges silver badges bronze badges. To wrap SetResult in a Task. Run works! To set the context looks interesting I will look into that. The code calling SendAwaitResponse is what could be condered not under my control so my goal was to keep ReceiverRun continue to deliver messages even if a single await continuation decides to use Wait or any other time consuming operations. There is now also the TaskCreationOptions. RunContinuationsAsynchronously method which allows you to specify in the TaskCompletionSource constructor that the continuations should be executed asynchronously.

It is. NET 4. SetResult should just flag a task as complete, and it's continuations should run whenever a thread pool thread becomes available. If SetResult is blocking waiting on that to happen, that should be filed as a serious bug.

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Waitforexit asynchronous transfer Process untriaged New issue has not been triaged by the area owner labels Apr 3, Add a comment. Mesjid No. What happens if you modify the code to wait for each task one by one? But those solutions are much more complex than just separating the async and blocking code.

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