Mirror of forum.nim-lang.org

3380 :: Thread vs Async for long running task

• frogEye (orginal) [2017-11-29T14:50:49+01:00] view original

  I working with libui-nim wrapper. On some event in UI, I need to perform a long-running task let say it takes 5s and then update UI accordingly. What is the recommended way to do that nim?

---

• boia01 (orginal) [2017-11-29T17:16:28+01:00] view original

  I think spawn is the generally recommended way for this. (It's basically the thread approach, with a thread-pool)

  https://nim-lang.org/docs/manual.html#parallel-spawn-spawn-statement

  The tricky part is usually after your long-running task ends, you typically need to notify the UI-thread / main-loop and run additional code in there. I've never used libui-nim so I can't comment there but typically this sort of functionality already offered by the framework/library.

  EDIT: Looking quickly at libui-nim, it looks like it has a proc called queueMain which may do this.

---

• treeform (orginal) [2017-11-29T23:46:40+01:00] view original

  Is your wrapper different from https://github.com/nim-lang/ui ?

---

• frogEye (orginal) [2017-12-02T23:02:56+01:00] view original

  No I am using this. But I have a driver written in nim which uses thread extensively. I making a tool to give a UI interface to the driver. So when click many UI widgets the UI frezzes as the firmware takes time to get the status of the device. So I am not able to decide what is write way to do this.

---