STATHREAD 作为 F# 中的异步工作流程

发布于 2024-07-26 22:49:54 字数 311 浏览 7 评论 0原文

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

如果 windowsProcess 需要 STATHREAD，该怎么办？这种结构可能吗？

原文

Consider the following code fragment:

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

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

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想你只要分分秒秒 2024-08-02 22:49:54

如果有一个具有 SyncrhonizationContext 的特定线程（例如 UI 线程），那么您可以执行例如

// 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() 
    }

但通常并行任务将在线程池中启动。

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() 
    }

but in general parallel tasks will start in the threadpool.

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