Atomic Event Emitter

Occasionally, you have a race condition between two asynchronous functions where one must run after the other. This atomic event emitter is built just for that.

var atomic = {s:{},after:function(n,f,c){c=this.s[n]=this.s[n]||[];c==1?f():c.push(f)},fire:function(n,c,f){for(c=this.s[n]||[];f=c.pop();)f();this.s[n]=1}};
setTimeout(function () {
  atomic.fire('first');
}, 100);
setTimeout(function () {
  atomic.after('first', function () {
    console.log('First must have run before this');
  });
}, 70 + (Math.random() * 60));

Tested in

This code is not tested anywhere (browsers and node).