gorillajs/app/plugins/ssl/node_modules/inflight/inflight.js

A smart development environment designed to easily install and neatly manage web applications. Gorilla JS frees you from the repetitive daily tasks like apps installation, database management, creation of virtual environment, server configuration… And it

var wrappy = require('wrappy')
var reqs = Object.create(null)
var once = require('once')

module.exports = wrappy(inflight)

function inflight (key, cb) {
  if (reqs[key]) {
    reqs[key].push(cb)
    return null
  } else {
    reqs[key] = [cb]
    return makeres(key)
  }
}

function makeres (key) {
  return once(function RES () {
    var cbs = reqs[key]
    var len = cbs.length
    var args = slice(arguments)

    // XXX It's somewhat ambiguous whether a new callback added in this
    // pass should be queued for later execution if something in the
    // list of callbacks throws, or if it should just be discarded.
    // However, it's such an edge case that it hardly matters, and either
    // choice is likely as surprising as the other.
    // As it happens, we do go ahead and schedule it for later execution.
    try {
      for (var i = 0; i < len; i++) {
        cbs[i].apply(null, args)
      }
    } finally {
      if (cbs.length > len) {
        // added more in the interim.
        // de-zalgo, just in case, but don't call again.
        cbs.splice(0, len)
        process.nextTick(function () {
          RES.apply(null, args)
        })
      } else {
        delete reqs[key]
      }
    }
  })
}

function slice (args) {
  var length = args.length
  var array = []

  for (var i = 0; i < length; i++) array[i] = args[i]
  return array
}