/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* 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.badlogic.gdx.utils;
/** Wrapper around System.nanoTime() and System.currentTimeMillis(). Use this if you want to be compatible across all platforms!
* @author mzechner */
public final class TimeUtils {
/** @return The current value of the system timer, in nanoseconds. */
public static long nanoTime () {
return System.nanoTime();
}
/** @return the difference, measured in milliseconds, between the current time and midnight, January 1, 1970 UTC. */
public static long millis () {
return System.currentTimeMillis();
}
private static final long nanosPerMilli = 1000000;
/** Convert nanoseconds time to milliseconds
* @param nanos must be nanoseconds
* @return time value in milliseconds */
public static long nanosToMillis (long nanos) {
return nanos / nanosPerMilli;
}
/** Convert milliseconds time to nanoseconds
* @param millis must be milliseconds
* @return time value in nanoseconds */
public static long millisToNanos (long millis) {
return millis * nanosPerMilli;
}
/** Get the time in nanos passed since a previous time
* @param prevTime - must be nanoseconds
* @return - time passed since prevTime in nanoseconds */
public static long timeSinceNanos (long prevTime) {
return nanoTime() - prevTime;
}
/** Get the time in millis passed since a previous time
* @param prevTime - must be milliseconds
* @return - time passed since prevTime in milliseconds */
public static long timeSinceMillis (long prevTime) {
return millis() - prevTime;
}
}