create Timer for neko/cpp when NME/OpenFL are not used

[fponticelli]

[fponticelli]

From Hugh on the ML:

I guess the first question is do you want sync or async timer callbacks? Sync is probably the most "cross platform" way.

I think the haxe timer class could easily be extended for non event driver apps by having a function "processTimers()". So like this:

public static function main() {
   var count = 10;
   Timer.delay(function() trace("Hi"), 1000 );
   Timer.processTimers();
}

And a sync processTimers can be created without any threads, by creating a list of pending timers.

public static function processTimers() {
   while(true) {
       var nextTimer = findNextTimer();  // Get one with least due time
       if (nextTimer==null)
          break;
       var delay = nextTimer.due - stamp();
       if (delay>0)
          sleep(delay);
       nextTimer.run();
   }
}

Whether you want to automagically call processTimers() via macro or otherwise is a minor matter, but explicit calling is not that hard.