| /* |
| * Copyright 2013-present Facebook, Inc. |
| * |
| * 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. |
| */ |
| |
| package com.facebook.buck.timing; |
| |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| /** |
| * Provides a fake implementation of a {@link Clock} which increments by a fixed amount every |
| * time the time is queried. |
| */ |
| public class IncrementingFakeClock implements Clock { |
| private AtomicLong counter; |
| private final long increment; |
| |
| |
| public IncrementingFakeClock() { |
| this(1); |
| } |
| |
| public IncrementingFakeClock(long increment) { |
| this.counter = new AtomicLong(); |
| this.increment = increment; |
| } |
| |
| @Override |
| public long currentTimeMillis() { |
| return TimeUnit.NANOSECONDS.toMillis(counter.incrementAndGet()); |
| } |
| |
| @Override |
| public long nanoTime() { |
| return counter.addAndGet(increment); |
| } |
| } |