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/*
* Copyright 2014-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;
/**
* {@link Clock} implementation that invokes the {@link System} calls,
* adjusted to use the given nanos epoch.
*/
public class NanosAdjustedClock implements Clock {
private final long nanosEpoch;
public NanosAdjustedClock(long nanosEpoch) {
this.nanosEpoch = nanosEpoch - System.nanoTime();
}
@Override
public long currentTimeMillis() {
return System.currentTimeMillis();
}
@Override
public long nanoTime() {
return System.nanoTime() + nanosEpoch;
}
}