villa/bld/es5/concurrency.js

Promise utilities for async/await-ready environment.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var _1 = require(".");
var lockObjectToPromiseMapping = new Map();
function _lock(object, handler) {
    return tslib_1.__awaiter(this, void 0, void 0, function () {
        var error_1;
        return tslib_1.__generator(this, function (_a) {
            switch (_a.label) {
                case 0:
                    _a.trys.push([0, 2, , 3]);
                    return [4 /*yield*/, lockObjectToPromiseMapping.get(object)];
                case 1:
                    _a.sent();
                    return [3 /*break*/, 3];
                case 2:
                    error_1 = _a.sent();
                    return [3 /*break*/, 3];
                case 3: return [2 /*return*/, handler()];
            }
        });
    });
}
/**
 * A simple asynchronous lock that helps queueing operations.
 */
function lock(object, handler) {
    return tslib_1.__awaiter(this, void 0, void 0, function () {
        var ret;
        return tslib_1.__generator(this, function (_a) {
            ret = _lock(object, handler);
            lockObjectToPromiseMapping.set(object, ret);
            return [2 /*return*/, ret];
        });
    });
}
exports.lock = lock;
/**
 * Run tasks in parallel, similar to `v.map` but not mean to transform.
 */
function parallel(values, handler, concurrency) {
    return tslib_1.__awaiter(this, void 0, void 0, function () {
        return tslib_1.__generator(this, function (_a) {
            switch (_a.label) {
                case 0: return [4 /*yield*/, _1.map(values, handler, concurrency)];
                case 1:
                    _a.sent();
                    return [2 /*return*/];
            }
        });
    });
}
exports.parallel = parallel;
/**
 * Race tasks and fulfill or reject as soon as one of them fulfills or rejects.
 */
function race(values, transformer) {
    return tslib_1.__awaiter(this, void 0, void 0, function () {
        return tslib_1.__generator(this, function (_a) {
            return [2 /*return*/, Promise.race(values.map(transformer))];
        });
    });
}
exports.race = race;
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