@sentclose/sentc-nodejs/dist/file/Mutex.js

End-to-end encryption sdk

"use strict";
/**
 * @author Jörn Heinemann <joernheinemann@gmx.de>
 * @since 2021/09/16
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.Mutex = void 0;
/**
 * Mix of:
 * - https://stackoverflow.com/a/51086893/12177973
 * - https://github.com/mgtitimoli/await-mutex/blob/master/src/mutex.js
 */
class Mutex {
    constructor() {
        this.current = Promise.resolve();
    }
    lock() {
        let unlockNext;
        const p = new Promise((resolve) => {
            unlockNext = () => {
                return resolve();
            };
        });
        const unlock = this.current.then(() => { return unlockNext; });
        this.current = p;
        return unlock;
    }
}
exports.Mutex = Mutex;