ifx_db/lib/simple-queue.js

IBM Informix bindings for node

module.exports = SimpleQueue;

function SimpleQueue()
{
  var self = this;
  
  self.fifo = [];
  self.executing = false;
}

SimpleQueue.prototype.push = function (fn)
{
  var self = this;
  
  self.fifo.push(fn);
  
  self.maybeNext();
};

SimpleQueue.prototype.maybeNext = function ()
{
  var self = this;
  
  if (!self.executing)
  {
    self.next();
  }
};

SimpleQueue.prototype.next = function ()
{
  var self = this;
  
  if (self.fifo.length)
  {
    var fn = self.fifo.shift();
    
    self.executing = true;
    
    fn(function ()
    {
      self.executing = false;
      
      self.maybeNext();
    });
  }
};