95 lines
2.3 KiB
Kotlin
95 lines
2.3 KiB
Kotlin
/*
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* Copyright (c) 2020 Hemanth Savarla.
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*
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* Licensed under the GNU General Public License v3
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*
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* This is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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*/
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package code.name.monkey.retromusic.helper
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/**
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* Simple thread safe stop watch.
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*
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* @author Karim Abou Zeid (kabouzeid)
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*/
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class StopWatch {
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/**
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* The time the stop watch was last started.
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*/
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private var startTime: Long = 0
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/**
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* The time elapsed before the current [.startTime].
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*/
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private var previousElapsedTime: Long = 0
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/**
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* Whether the stop watch is currently running or not.
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*/
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private var isRunning: Boolean = false
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/**
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* @return the total elapsed time in milliseconds
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*/
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val elapsedTime: Long
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get() = synchronized(this) {
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var currentElapsedTime: Long = 0
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if (isRunning) {
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currentElapsedTime = System.currentTimeMillis() - startTime
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}
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return previousElapsedTime + currentElapsedTime
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}
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/**
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* Starts or continues the stop watch.
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*
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* @see .pause
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* @see .reset
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*/
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fun start() {
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synchronized(this) {
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startTime = System.currentTimeMillis()
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isRunning = true
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}
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}
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/**
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* Pauses the stop watch. It can be continued later from [.start].
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*
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* @see .start
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* @see .reset
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*/
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fun pause() {
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synchronized(this) {
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previousElapsedTime += System.currentTimeMillis() - startTime
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isRunning = false
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}
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}
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/**
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* Stops and resets the stop watch to zero milliseconds.
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*
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* @see .start
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* @see .pause
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*/
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fun reset() {
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synchronized(this) {
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startTime = 0
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previousElapsedTime = 0
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isRunning = false
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}
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}
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override fun toString(): String {
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return String.format("%d millis", elapsedTime)
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}
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}
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