STATHREAD作为F#中的异步工作流 [英] STATHREAD as async workflow in F#

问题描述

考虑以下代码片段:

let t1 = async { return process1() }
let t2 = async { return process2() }
let t3 = async { return windowsProcess() }

let execute =
    [ t1; t2; t3 ]
    |> Async.Parallel
    |> Async.RunSynchronously
    |> ignore

在windowsProcess需要STATHREAD的情况下该怎么办?这种构造有可能吗?

What to do in the case the windowsProcess requires a STATHREAD? Is this possible with this construction?

推荐答案

如果存在带有SyncrhonizationContext的特定线程，例如UI线程，那么您可以执行例如

If there's a particular thread with a SyncrhonizationContext, e.g. the UI thread, then you could do e.g.

// earlier on the UI thread...
let syncCtxt = System.Threading.SynchronizationContext.Current 

// then define t3 as
let t3 = async { 
    do! Async.SwitchToGuiThread(syncCtxt)
    // now we're running on the UI thread until the next async 'bind' point
    return windowsProcess() 
    }

但是通常并行任务将在线程池中启动.

but in general parallel tasks will start in the threadpool.

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