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/*
* Copyright (C) 2019 The Android Open Source Project
*
* 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.google.android.setupcompat.internal;
/**
* A time source; returns a time value representing the number of nanoseconds elapsed since some
* fixed but arbitrary point in time.
*
* <p><b>Warning:</b> this interface can only be used to measure elapsed time, not wall time.
*/
public interface Ticker {
/** Returns the number of nanoseconds elapsed since this ticker's fixed point of reference. */
long read();
}
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