Edit File: Semaphore.js
/* MIT License http://www.opensource.org/licenses/mit-license.php Author Tobias Koppers @sokra */ "use strict"; class Semaphore { constructor(available) { this.available = available; this.waiters = []; } acquire(callback) { if(this.available > 0) { this.available--; callback(); } else { this.waiters.push(callback); } } release() { if(this.waiters.length > 0) { const callback = this.waiters.pop(); process.nextTick(callback); } else { this.available++; } } } module.exports = Semaphore;
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