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node_modules/webpack/lib/util/Semaphore.js
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1lostsun
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05 май 2025, 11:35
05 май 2025, 11:35
fe8f535
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/* MIT License http://www.opensource.org/licenses/mit-license.php Author Tobias Koppers @sokra */ "use strict"; class Semaphore { /** * Creates an instance of Semaphore. * @param {number} available the amount available number of "tasks" * in the Semaphore */ constructor(available) { this.available = available; /** @type {(() => void)[]} */ this.waiters = []; /** @private */ this._continue = this._continue.bind(this); } /** * @param {() => void} callback function block to capture and run * @returns {void} */ acquire(callback) { if (this.available > 0) { this.available--; callback(); } else { this.waiters.push(callback); } } release() { this.available++; if (this.waiters.length > 0) { process.nextTick(this._continue); } } _continue() { if (this.available > 0 && this.waiters.length > 0) { this.available--; const callback = /** @type {(() => void)} */ (this.waiters.pop()); callback(); } } } module.exports = Semaphore;