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| Original file line number | Diff line number | Diff line change |
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| @@ -1,3 +1,6 @@ | ||
| # dist | ||
| dist/ | ||
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| # ignore dependencies | ||
| node_modules/ | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| 'use strict' | ||
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| var callbackCount = require('callback-count') | ||
| var nextTick = require('next-tick') | ||
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| function Parallizer (max, col, paused) { | ||
| if (!(this instanceof Parallizer)) return new Parallizer(max, col, paused) | ||
| var pm = parseInt(max, 10) | ||
| this._max = (!isNaN(pm) && pm > 0) ? pm : 1 | ||
| this._running = 0 | ||
| this._queue = [] | ||
| this._paused = !!paused | ||
| this._col = null | ||
| if (typeof col === 'function') { | ||
| this._col = callbackCount(nextTick.apply.bind(nextTick, null, [col])) | ||
| } | ||
| } | ||
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| Parallizer.prototype.add = function (fn, args, cb, scope, high) { | ||
| var self = this | ||
| if (!(args instanceof Array)) args = [] | ||
| if (typeof cb !== 'function') cb = function () {} | ||
| args.push(function () { | ||
| cb.apply(this, Array.prototype.slice.call(arguments)) | ||
| if (self._col) self._col.next() | ||
| self._running-- | ||
| self._check() | ||
| }) | ||
| fn = (typeof fn === 'function') ? fn : function () {} | ||
| var fno = fn.apply.bind(fn, scope || null, args || []) | ||
| self._queue[high ? 'unshift' : 'push'](fno) | ||
| if (self._col) self._col.inc() | ||
| self._check() | ||
| } | ||
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| Parallizer.prototype.sadd = function () { | ||
| var fa = Array.prototype.slice.call(arguments) | ||
| if (fa.length > 0) { | ||
| var fn = fa.shift() | ||
| var cb = function () {} | ||
| if (fa.length > 0 && typeof fa[fa.length - 1] === 'function') cb = fa.pop() | ||
| this.add(fn, fa, cb) | ||
| } | ||
| } | ||
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| Parallizer.prototype._check = function () { | ||
| if (!this._paused && this._running < this._max && this._queue.length > 0) { | ||
| this._running++ | ||
| nextTick(this._queue.shift()) | ||
| } | ||
| } | ||
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| Parallizer.prototype.pause = function () { | ||
| this._paused = true | ||
| } | ||
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| Parallizer.prototype.start = function () { | ||
| this._paused = false | ||
| this._check() | ||
| } | ||
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| // backwards compatibility | ||
| Parallizer.Parallel = Parallizer | ||
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| module.exports = Parallizer |
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