.NET Parallel Programming

All about Async/Await, System.Threading.Tasks, System.Collections.Concurrent, System.Linq, and more…

Cancellation - .NET Parallel Programming

Cooperatively pausing async methods

January 13, 2013 Jan 13, 2013 01/13/13
Stephen Toub - MSFT
Recently I was writing an app that processed a bunch of files asynchronously.  As with the Windows copy file dialog, I wanted to be able to provide the user with a button that would pause the processing operation.To achieve that, I implemented a simple mechanism that would allow me to pass a “pause token” into the async method...

Coalescing CancellationTokens from Timeouts

December 3, 2011 Dec 3, 2011 12/3/11
Stephen Toub - MSFT
In the .NET Framework 4.5 Developer Preview, you’ll find that CancellationTokenSource now has timeout support built directly into its implementation.  This makes it very easy to create a token that will automatically have cancellation requested after a particular time interval, e.g. public static CancellationToken FromTimeout(int ...

New Feature? :: Delayed cancellation

November 4, 2010 Nov 4, 2010 11/4/10
Danny Shih
 We’re interested in adding support for scheduling cancellation.  For example: // Create a token source that will Cancel() after a delay var cts = new CancellationTokenSource(TimeSpan.FromMilliseconds(100));// And/or schedule a Cancel() call cts.CancelAfter(TimeSpan.FromMilliseconds(100));We’ve heard from many folks ...

What’s new in Beta 2 for the Task Parallel Library? (Part 1/3)

October 19, 2009 Oct 19, 2009 10/19/09
Danny Shih
Related posts: Visual Studio 2010 and .NET 4 Beta 2 is here!  In terms of completeness and readiness for production coding, Beta 2 promises to be much better than Beta 1, and TPL is one component that delivers significant improvements over what was previously available.  To get you excited about it, this series of posts ...

Cancellation in Parallel Extensions

June 22, 2009 Jun 22, 2009 06/22/09
Mike Liddell
One of the great features that crosses all of Parallel Extensions types is a consistent approach to cancellation (see https://blogs.msdn.com/pfxteam/archive/2009/05/22/9635790.aspx). In this post we explore some of the ways cancellation is used in Parallel Extensions and explain the guidance we developed. The new cancellation system is a ...

.NET 4 Cancellation Framework

May 22, 2009 May 22, 2009 05/22/09
Mike Liddell
A very interesting addition to .NET 4 is a set of new types that specifically assist with building cancellation-aware applications and libraries. The new types enable rich scenarios for convenient and safe cancellation, and help simplify situations that used to be be difficult and error-prone and non-composable. The details of the new types ...