concurrency

[Infinitegde]

How does concurrency work? lol
in warcraft 3*

 

[Weep]

It...doesn't?

Can you be more specific?

 

[tooltiperror]

If you mean true concurrency, it doesn't.

The Warcraft III engine is linear.

 

[Infinitegde]

okay i see. So if a function is running and a timer fires off, when does warcraft 3 go to the callback of the timer? after the function is completed? or is there some special case like TriggerEvaluate or TriggerExecute or something else?

 

[tooltiperror]

I tested it myself. This displayed:

1. onInit runs.
2. The timer is started.
3. onInit terminates.
4. The timer expires.

//! zinc

library Concurrency
{
  
  function handlerfunc()
  {
      BJDebugMsg("The timer expires.");
  }
  
  function onInit()
  {
    timer t = CreateTimer();
      BJDebugMsg("onInit runs.");
      BJDebugMsg("The timer is started.");
      TimerStart(t, 2.00, false, function handlerfunc);
      BJDebugMsg("onInit terminates.");
  }
}

//! endzinc

 

[PurgeandFire]

okay i see. So if a function is running and a timer fires off, when does warcraft 3 go to the callback of the timer? after the function is completed? or is there some special case like TriggerEvaluate or TriggerExecute or something else?

Well, for timers, it will always execute after the functions succeeding the call, (assuming you don't have waits) because it has a duration applied before the callback is executed. Timers don't perform sleeps for the thread they are running in, they wait and then execute the callback on a new thread.

For trigger execute and trigger evaluate, they will both be performed before the succeeding functions. So, for example, this:

scope Test initializer Init
    globals
        trigger test_0 = CreateTrigger()
        trigger test_1 = CreateTrigger()
    endglobals
    
    private function cond takes nothing returns boolean
        call BJDebugMsg("Conditions executed...")
        return false
    endfunction
    
    private function action takes nothing returns nothing
        call BJDebugMsg("Actions executed...")
    endfunction
    
    private function esc takes nothing returns nothing
        call BJDebugMsg("Executing...")
        call TriggerExecute(test_0)
        call TriggerEvaluate(test_1)
        call BJDebugMsg("Finished...")
    endfunction
    
    private function Init takes nothing returns nothing
        call TriggerAddAction(test_0,function action)
        call TriggerAddCondition(test_1,Condition(function cond))
    endfunction
endscope

Will read "Executing...", followed by "Actions executed...", "Conditions executed...", and finally "Finished...".