Sync Stamper

syncstamp.js

var stamper = function(queue) {
  var i = 0,
      waiting = false;
  function incr() {
    i += 1;
    waiting = false;
  }
  function incrAfter() {
    if (!waiting) {
      queue(incr);
      waiting = true;
    }
  }
  return function() {
    incrAfter();
    return i;
  };
};


// eg. for node
var stamp = stamper(process.nextTick);

stamp();  // => 0
stamp();  // => 0

process.nextTick(function() {
  stamp();  // => 1
});

process.nextTick(function() {
  stamp();  // => 1  nooooooooo
});