@iotile/iotile-common/dist/lib/mutex.js

Common utilities for IoTile Packages and Applications

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var Mutex = /** @class */ (function () {
    function Mutex() {
        this._queue = [];
        this._pending = false;
    }
    Mutex.prototype.acquire = function () {
        var that = this;
        var entry = new Promise(function (resolve, reject) {
            that._queue.push(resolve);
        });
        if (!this._pending) {
            this.dispatch();
        }
        return entry;
    };
    Mutex.prototype.dispatch = function () {
        if (this._queue.length > 0) {
            var nextRunnable = this._queue.shift();
            var that_1 = this;
            var releaseFunction = function () {
                that_1.dispatch();
            };
            this._pending = true;
            if (nextRunnable) {
                nextRunnable(releaseFunction);
            }
        }
        else {
            this._pending = false;
        }
    };
    return Mutex;
}());
exports.Mutex = Mutex;
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