node-json-db/dist/lock/Lock.js

Database using JSON file as storage for Node.JS

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.writeLockAsync = exports.readLockAsync = void 0;
const ReadWriteLock = require("rwlock");
const Error_1 = require("./Error");
const lock = new ReadWriteLock();
/**
 * take a read lock that will be released when the function has finished running
 * @param func
 * @param timeout time in ms to wait to get the lock. Null mean infinite.
 */
const readLockAsync = (func, timeout = null) => {
    let options = {};
    if (timeout != null) {
        options = { timeout };
    }
    return new Promise((resolve, reject) => {
        lock.readLock(async (release) => {
            try {
                const result = await func();
                resolve(result);
            }
            catch (e) {
                reject(e);
            }
            finally {
                release();
            }
        }, {
            ...options, timeoutCallback() {
                reject(new Error_1.TimeoutError("Timeout", 100));
            }
        });
    });
};
exports.readLockAsync = readLockAsync;
/**
 * Take a write lock that will be released when the function has finished running
 * @param func
 * @param timeout time in ms to wait to get the lock. Null mean infinite.
 */
const writeLockAsync = (func, timeout = null) => {
    let options = {};
    if (timeout != null) {
        options = { timeout };
    }
    return new Promise((resolve, reject) => {
        lock.writeLock(async (release) => {
            try {
                const result = await func();
                resolve(result);
            }
            catch (e) {
                reject(e);
            }
            finally {
                release();
            }
        }, {
            ...options, timeoutCallback() {
                reject(new Error_1.TimeoutError("Timeout", 100));
            }
        });
    });
};
exports.writeLockAsync = writeLockAsync;
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