Process: A process is an instance of a computer program that is being executed. It contains the program code and its current activity. Depending on the operating system (OS), a process may be made up of multiple threads of execution that execute instructions concurrently. Process-based multitasking enables you to run the Java compiler at the … Read more
You probably don’t need separate OnlyOnFaulted and OnlyOnRanToCompletion handlers, and you’re not handling OnlyOnCanceled. Check this answer for more details. But when debugging in IDE, A IDE exception message (“Unhandled exception in user code” ) appears when the control executes the line You see the exception under debugger because you probably have enabled it in … Read more
You could combine the resulting Task with a Task.Delay() using Task.WhenAny(): await Task.WhenAny(Task.WhenAll(tasks), Task.Delay(timeout)); If you want to harvest completed tasks in case of a timeout: var completedResults = tasks .Where(t => t.Status == TaskStatus.RanToCompletion) .Select(t => t.Result) .ToList();
The objective of the Tasks namespace is to provide a pluggable architecture to make multi-tasking applications easier to write and more flexible. The implementation uses a TaskScheduler object to control the handling of tasks. This has virtual methods that you can override to create your own task handling. Methods include for instance protected virtual void … Read more
It can be quantified, the threadpool manager adds an extra thread beyond the optimum when the existing tp threads don’t complete soon enough. It does this twice a second, up to the maximum set by SetMaxThreads(). Which has a very high default value. The optimum is the number of processor cores the machine has available, … Read more
I mailed Stephen Toub – a member of the PFX Team – about this question. He’s come back to me really quickly, with a lot of detail – so I’ll just copy and paste his text here. I haven’t quoted it all, as reading a large amount of quoted text ends up getting less comfortable … Read more
The second test has two nested tasks and you are waiting for the outermost one, to fix this you must use t.Result.Wait(). t.Result gets the inner task. The second method is roughly equivalent of this: public void TestAwait() { var t = Task.Factory.StartNew(() => { Console.WriteLine(“Start”); return Task.Factory.StartNew(() => { Task.Delay(5000).Wait(); Console.WriteLine(“Done”); }); }); t.Wait(); … Read more
The priority of the task depends on the keyword you use to tag it. You can see and edit a list of keywords and their priorities by going to Tools->Options->Environment->Task List. For example, on my installation, I’ve got HACK, TODO and UNDONE as normal priority, and UnresolvedMergeConflict as high priority. If you want to add … Read more
According to someone who may be in the know… The justification is that the advantage of covariance is outweighed by the disadvantage of clutter (i.e. everyone would have to make a decision about whether to use Task or ITask in every single place in their code). It sounds to me like there is not a … Read more
The idea of using Task.Wait will do the trick but will cause the calling thread to (as the code says) wait and therefore block until the task has finalized, which effectively makes the code synchronous instead of async. Instead use the Task.ContinueWith option to achieve results: Task.Run(() => { //do some work }).ContinueWith((t) => { … Read more