Async.SwitchToNewThread Method (F#)
Creates an asynchronous computation that creates a new thread and runs its continuation in that thread.
Namespace/Module Path: Microsoft.FSharp.Control
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature:
static member SwitchToNewThread : unit -> Async<unit>
// Usage:
Async.SwitchToNewThread ()
Return Value
A computation that will execute on a new thread.
Example
The following code example shows how to use Async.SwitchToNewThread and Async.SwitchToThreadPool to wrap a synchronous method call as an asynchronous method.
open System
open System.IO
let asyncMethod f =
async {
do! Async.SwitchToNewThread()
let result = f()
do! Async.SwitchToThreadPool()
return result
}
let GetFilesAsync(path) = asyncMethod (fun () -> Directory.GetFiles(path))
let listFiles path =
async {
let! files = GetFilesAsync(path)
Array.iter (fun elem -> printfn "%s" elem) files
}
printfn "Here we go..."
// The output is interleaved, which shows that these are both
// running simultaneously.
Async.Start(listFiles ".")
Async.Start(listFiles ".")
Console.WriteLine("Press a key to continue...")
Console.ReadLine() |> ignore
Platforms
Windows 7, Windows Vista SP2, Windows XP SP3, Windows XP x64 SP2, Windows Server 2008 R2, Windows Server 2008 SP2, Windows Server 2003 SP2
Version Information
F# Runtime
Supported in: 2.0, 4.0
Silverlight
Supported in: 3