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//proc/thread-self/root/lib/nodejs/cyclist/index.js
var twoify = function (n) { if (n && !(n & (n - 1))) return n var p = 1 while (p < n) p <<= 1 return p } var Cyclist = function (size) { if (!(this instanceof Cyclist)) return new Cyclist(size) size = twoify(size) this.mask = size - 1 this.size = size this.values = new Array(size) } Cyclist.prototype.put = function (index, val) { var pos = index & this.mask this.values[pos] = val return pos } Cyclist.prototype.get = function (index) { return this.values[index & this.mask] } Cyclist.prototype.del = function (index) { var pos = index & this.mask var val = this.values[pos] this.values[pos] = undefined return val } module.exports = Cyclist