Snippets tagged cancellation
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Cancellable agent
The snippet implements a wrapper for standard F# agent that can be cancelled using the IDisposable interface. This makes it possible to use the agent locally (e.g. inside asynchronous workflow). When it is no longer needed, the agent's body is cancelled.
11 people like this
Like the snippet!Posted: 13 years ago by Tomas Petricek
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An implementation of Async.Choice
This is an implementation of the Async.Choice combinator that composes a sequence of workflows into one whose result is that of the first workflow that returns a *valid* result. You can think of it as a nondeterministic version of (Seq.tryPick id). This implementation draws ideas from Tomas Petricek's choice implementation in http://fssnip.net/6D. UPDATE (11/2015): Following the discussion in https://fslang.uservoice.com/forums/245727-f-language/suggestions/10575069-add-async-choice-to-fsharp-core I have updated the snippet.
3 people like this
Like the snippet!Posted: 12 years ago by Eirik Tsarpalis
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Await wait handle with cancellation
Await a wait handle with a cancellation token and optional timeout. Returns a flag indicating whether the handle was signalled, the timeout period elapsed, or the wait was cancelled.
2 people like this
Like the snippet!Posted: 10 years ago by Michael Parker
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Async computation with cancellation timeout
Async.Start with timeout in seconds
3 people like this
Like the snippet!Posted: 6 years ago by Tuomas Hietanen
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Asynchronous cancellation of a workflow
The snippet implements Async.StartCancellable method that can be used to start a given workflow and then cancel it. The cancellation of the workflow is done asynchronously, which means that the caller will wait until the workflow is actually cancelled.
6 people like this
Like the snippet!Posted: 12 years ago by Tomas Petricek
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Cooperative cancellation in Async workflows
A simple implementation that protects the nested workflow from external cancellation. The external cancellation token is passed as an argument for cooperative cancellation. Kudos to Gian Ntzik for this one.
3 people like this
Like the snippet!Posted: 11 years ago by Eirik Tsarpalis
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Async workflow with asynchronous "finally" clause
The F# Core library offers async.TryFinally which where a synchronous compensation function (of type unit -> unit) is run after an error or cancellation. However, it offers no way to start an asynchronous compensation. The TryFinallyAsync method defined below offers a way around this.
2 people like this
Like the snippet!Posted: 9 years ago by Anton Tcholakov