You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
127 lines
2.4 KiB
127 lines
2.4 KiB
5 years ago
|
'use strict'
|
||
|
|
||
|
var xtend = require('xtend')
|
||
|
var reusify = require('reusify')
|
||
|
var defaults = {
|
||
|
released: nop,
|
||
|
results: true
|
||
|
}
|
||
|
|
||
|
function fastseries (options) {
|
||
|
options = xtend(defaults, options)
|
||
|
|
||
|
var released = options.released
|
||
|
var queue = reusify(options.results ? ResultsHolder : NoResultsHolder)
|
||
|
|
||
|
return series
|
||
|
|
||
|
function series (that, toCall, arg, done) {
|
||
|
var holder = queue.get()
|
||
|
holder._released = release
|
||
|
|
||
|
done = done || nop
|
||
|
|
||
|
if (toCall.length === 0) {
|
||
|
done.call(that)
|
||
|
release(holder)
|
||
|
} else {
|
||
|
holder._callback = done
|
||
|
|
||
|
if (toCall.call) {
|
||
|
holder._list = arg
|
||
|
holder._each = toCall
|
||
|
} else {
|
||
|
holder._list = toCall
|
||
|
holder._arg = arg
|
||
|
}
|
||
|
|
||
|
holder._callThat = that
|
||
|
holder.release()
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function release (holder) {
|
||
|
queue.release(holder)
|
||
|
released()
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function reset () {
|
||
|
this._list = null
|
||
|
this._arg = null
|
||
|
this._callThat = null
|
||
|
this._callback = nop
|
||
|
this._each = null
|
||
|
}
|
||
|
|
||
|
function NoResultsHolder () {
|
||
|
reset.call(this)
|
||
|
this.next = null
|
||
|
this._released = null
|
||
|
|
||
|
var that = this
|
||
|
var i = 0
|
||
|
this.release = function () {
|
||
|
if (i < that._list.length) {
|
||
|
if (that._each) {
|
||
|
makeCall(that._callThat, that._each, that._list[i++], that.release)
|
||
|
} else {
|
||
|
makeCall(that._callThat, that._list[i++], that._arg, that.release)
|
||
|
}
|
||
|
} else {
|
||
|
that._callback.call(that._callThat)
|
||
|
reset.call(that)
|
||
|
i = 0
|
||
|
that._released(that)
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function ResultsHolder (_release) {
|
||
|
reset.call(this)
|
||
|
|
||
|
this._results = []
|
||
|
this.next = null
|
||
|
this._released = null
|
||
|
|
||
|
var that = this
|
||
|
var i = 0
|
||
|
this.release = function (err, result) {
|
||
|
if (i !== 0) that._results[i - 1] = result
|
||
|
|
||
|
if (!err && i < that._list.length) {
|
||
|
if (that._each) {
|
||
|
makeCall(that._callThat, that._each, that._list[i++], that.release)
|
||
|
} else {
|
||
|
makeCall(that._callThat, that._list[i++], that._arg, that.release)
|
||
|
}
|
||
|
} else {
|
||
|
that._callback.call(that._callThat, err, that._results)
|
||
|
reset.call(that)
|
||
|
that._results = []
|
||
|
i = 0
|
||
|
that._released(that)
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function makeCall (that, cb, arg, release) {
|
||
|
if (that) {
|
||
|
if (cb.length === 1) {
|
||
|
cb.call(that, release)
|
||
|
} else {
|
||
|
cb.call(that, arg, release)
|
||
|
}
|
||
|
} else {
|
||
|
if (cb.length === 1) {
|
||
|
cb(release)
|
||
|
} else {
|
||
|
cb(arg, release)
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function nop () { }
|
||
|
|
||
|
module.exports = fastseries
|