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Questions tagged [task]

A task is an abstraction that is used to work with concurrency, it can denote operation that should be executed concurrently with the rest of a program. A task is a concurrent thread of execution in Ada and represents an asynchronous operation in .NET, also it corresponds to Threads in Java.

A task is an abstraction that is used to work with concurrency, it can denote operation that should be executed concurrently with the rest of a program.

  • Ada
    A task is a concurrent thread of execution in an Ada program. Task definitions are split into two parts - declaration and a body, which is mandatory. Task declaration defines entities exported from the task, whereas its body contains local declarations and statements of the task.

  • .NET
    Task is used to represents an asynchronous operation, it is a core concept of the which is used for asynchronous and parallel programming in the .NET framework.

  • C++
    future is used to represent an operation which may complete some time in the future. It helps programs achieve a degree of asynchrony where they may want/need to perform certain operations in parallel. std::async creates a task which may execute asynchronously, returning a std::future.

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Mark task as completed

I’m implementing a client protocol MyProtocol over TCP/IP. The protocol’s Connect() method should have a signature similar to that of TcpClient.ConnectAsync() – that is, it should return a Task: Task MyProtocol.Connect (…); This method…
alexk
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Does await Task.Delay; really enable web server to process more simultaneous requests?

From Pro Asynchrnous Programming with .Net: for (int nTry = 0; nTry < 3; nTry++) { try { AttemptOperation(); break; } catch (OperationFailedException) { } Thread.Sleep(2000); …
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OpenMP tasks & data environment

I'm trying to use a task construct for my C++/OpenMP program: #pragma omp parallel { typename ClusterNormal::VectorMean ResultMeanThread; ResultMeanThread.setZero(); #pragma omp single for(list
Darko
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Passing value parameter to Task in c#

I have an issue with passing a long by value to a Task. I have a list of ID's where I loop through each one, assign to a local variable then pass as a parameter to a new Task. I do not wait for the task to complete before looping round and…
user910643
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OpenMP Task Scheduling Policies

I would like to know how the task scheduling of the OpenMP task queue is performed. Here I read that, by default, OpenMP imposes a breadth-first scheduler and that they did some tests FIFO vs. LIFO, but they don't say anything about the default.…
fc67
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How to add hbm2java task to Ant in NetBeans

I'm trying to generate POJO's from mapping xml files. I read something about adding an ant task, to do it easily. I've added this xml below to my project's build-impl.xml in Netbeans, but nothing happens: …
Janov Byrnisson
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How to know an Android task's visibility change?

I have 2 activities which are using the same Android task - i.e. they will use the same back stack. Let's call A the first activity in the back stack, and B the second activity in the back stack. case 1: A is notified that it goes in the background…
Vincent Cantin
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Why can't see all task when use 'tasks' task in Gradle?

task startSession << { chant() } def chant() { ant.echo(message: 'Repeat after me...') } 3.times { task "yayGradle$it" << { println 'Gradle rocks' } } yayGradle0.dependsOn startSession yayGradle2.dependsOn yayGradle1, yayGradle0 task…
Xelian
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Gradle Error while instrumenting class

I’m working on a POC with Jacoco and gradle for GigaProject and am getting this error when it gets to jacoco during "test" task aka instrumenting test source code. Any ideas? Thanks. java.lang.instrument.IllegalClassFormatException: Error while…
AKS
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How to wrap 3rdParty function with callback to be able to wait for the callback finish and then return a result from callback function?

I want to wrap 3rd party function to Task to be able to await for finish the callback function. This is what I would like to achieve: public MyClass MyProperty { get { if (myProperty == null) myProperty =…
bendi
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About the Task.StartNew(Action, Object) method
I'm learning the TPL on this page, and one code block confuses me a lot. I was reading this page: Task Parallelism (Task Parallel Library) in one section, it said that the following code is the right solution because a lambda in a loop can't get the…
Albert Gao
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Catching the original exception with TransformBlock

I am using the TransformBlock from the TPL Dataflow library, and I have realized that when a exception is thrown during the transform, I get a generic exception in the "Receive" method, but no mention to the original one. In this code: Func
vtortola
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ThrowUnobservedTaskExceptions not working

I have created a test application in Winform to learn exception handling in Task (c#). Target framework is 4.0. Following is my code for exception handling var task = Task.Factory.StartNew(() => getDataTable(Convert.ToInt32 …
Anirban Paul
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ThreadAbortException with await

I'm facing a weird bug. I have something like 100 long running tasks and I want to run 10 of them in the same time. I found something very similar to my need here : http://msdn.microsoft.com/en-us/library/hh873173%28v=vs.110%29.aspx in the…
Guillaume Philipp
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Explanation on Tasks

I'd like some clarification on code I didn't do and have to modify in a service. Here's some parts of the code of the service private Thread _thread; private ConcurrentQueue _tasks = new ConcurrentQueue(); private Task _runningTask =…
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