1 /*
2 * Copyright 2025 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * https://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package io.netty.util.concurrent;
17
18 import java.util.Objects;
19 import java.util.concurrent.TimeUnit;
20
21 final class SystemTicker implements Ticker {
22 static final SystemTicker INSTANCE = new SystemTicker();
23 private static final long START_TIME = System.nanoTime();
24
25 @Override
26 public long initialNanoTime() {
27 return START_TIME;
28 }
29
30 @Override
31 public long nanoTime() {
32 return System.nanoTime() - START_TIME;
33 }
34
35 @Override
36 public void sleep(long delay, TimeUnit unit) throws InterruptedException {
37 Objects.requireNonNull(unit, "unit");
38 unit.sleep(delay);
39 }
40 }