Mirror of forum.nim-lang.org

4311 :: Execute a statement by every thread in the threadpool!!

• marklane (orginal) [2018-10-13T15:51:33+02:00] view original

  Hello everybody,

  I need to make sure that every thread in a threadpool gets correct initialization before getting spawning tasks. It is possible to make register a initializer for the thread or forcing proc to be executed on every thread in a pool?

  Marklane

---

• mikra (orginal) [2018-10-13T21:28:43+02:00] view original

  Hi marklane, you don´t need an initialisation hook. just ensure that your worker-code is reentrant (if you like to go without locks) and use a kind of "context"-object as a parameter for your worker-proc for instance. An example would be Goran´s excellent blog: http://goran.krampe.se/2014/10/25/nim-socketserver/ or https://forum.nim-lang.org/t/959 but there are also other valuable examples on github. Hope this helps.

---

• Araq (orginal) [2018-10-13T23:35:00+02:00] view original

  We had this feature for a brief period of time but it is too easy to introduce races if you don't control thread creation and register a "on new thread do" hook too late. And if you do control thread creation you might as well run some init code in your threads.

---

• cdome (orginal) [2018-10-14T21:42:40+02:00] view original

  Add thread locak bool variable to your thread init proc and do

  
  if not initialialized:
    do stuff
    initialized = true
  Run

---