trade360-nodejs-sdk/dist/src/utilities/async-lock.js

LSports Trade360 SDK for Node.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.AsyncLock = void 0;
/**
 * A simple async lock implementation. This lock
 * is not reentrant.
 */
class AsyncLock {
    constructor() {
        this.locked = false;
        this.waitingResolvers = [];
    }
    /**
     *  Acquire the lock. If the lock is already
     * acquired, the next caller  wait until it is
     * released.
     * @returns a promise that resolves when the
     * lock is acquired
     */
    async acquire() {
        if (!this.locked) {
            this.locked = true;
            return;
        }
        return new Promise((resolve) => {
            this.waitingResolvers.push(resolve);
        });
    }
    /**
     * Release the lock. If there are waiting promises,
     * resolve the first one.
     */
    release() {
        if (this.waitingResolvers.length > 0) {
            const resolve = this.waitingResolvers.shift();
            resolve();
        }
        else {
            this.locked = false;
        }
    }
}
exports.AsyncLock = AsyncLock;
//# sourceMappingURL=async-lock.js.map