Sha256: 4b991290680d9027dd786493c6e816900355956d88afb6ae4d97b5ac5a3ee0f5
Contents?: true
Size: 1.08 KB
Versions: 8
Compression:
Stored size: 1.08 KB
Contents
module.exports = Pend; function Pend() { this.pending = 0; this.max = Infinity; this.listeners = []; this.waiting = []; this.error = null; } Pend.prototype.go = function(fn) { if (this.pending < this.max) { pendGo(this, fn); } else { this.waiting.push(fn); } }; Pend.prototype.wait = function(cb) { if (this.pending === 0) { cb(this.error); } else { this.listeners.push(cb); } }; Pend.prototype.hold = function() { return pendHold(this); }; function pendHold(self) { self.pending += 1; var called = false; return onCb; function onCb(err) { if (called) throw new Error("callback called twice"); called = true; self.error = self.error || err; self.pending -= 1; if (self.waiting.length > 0 && self.pending < self.max) { pendGo(self, self.waiting.shift()); } else if (self.pending === 0) { var listeners = self.listeners; self.listeners = []; listeners.forEach(cbListener); } } function cbListener(listener) { listener(self.error); } } function pendGo(self, fn) { fn(pendHold(self)); }
Version data entries
8 entries across 8 versions & 3 rubygems