37 lines
1.4 KiB
JavaScript
37 lines
1.4 KiB
JavaScript
"use strict";
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.monotonicTime = monotonicTime;
|
|
/**
|
|
* Copyright (c) Microsoft Corporation.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
// The `process.hrtime()` returns a time from some arbitrary
|
|
// date in the past; on certain systems, this is the time from the system boot.
|
|
// The `monotonicTime()` converts this to milliseconds.
|
|
//
|
|
// For a Linux server with uptime of 36 days, the `monotonicTime()` value
|
|
// will be 36 * 86400 * 1000 = 3_110_400_000, which is larger than
|
|
// the maximum value that `setTimeout` accepts as an argument: 2_147_483_647.
|
|
//
|
|
// To make the `monotonicTime()` a reasonable value, we anchor
|
|
// it to the time of the first import of this utility.
|
|
const initialTime = process.hrtime();
|
|
function monotonicTime() {
|
|
const [seconds, nanoseconds] = process.hrtime(initialTime);
|
|
return seconds * 1000 + (nanoseconds / 1000 | 0) / 1000;
|
|
} |