| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.test.failurehandler; |
| |
| public final class Stopwatch { |
| protected boolean isResultAvailable; |
| protected boolean isRunning; |
| |
| private long startTimeNs; |
| private long stopTimeNs; |
| |
| public Stopwatch() { |
| isResultAvailable = false; |
| } |
| |
| /** |
| * Starts measuring time. |
| */ |
| public void start() { |
| startTimeNs = System.nanoTime(); |
| isRunning = true; |
| } |
| |
| /** |
| * Stops measuring time. |
| */ |
| public void stop() { |
| if (!isRunning) { |
| throw new IllegalStateException(" hasn't been started"); |
| } |
| stopTimeNs = System.nanoTime(); |
| isRunning = false; |
| isResultAvailable = true; |
| } |
| |
| /** |
| * @return time in nanoseconds measured between |
| * calls of {@link #start()} and {@link #stop()} methods. |
| * |
| * @throws IllegalStateException if called without preceding |
| * {@link #start()} {@link #stop()} method |
| */ |
| public long getElapsedTimeNs() { |
| if (isRunning) { |
| throw new IllegalStateException("hasn't been stopped"); |
| } |
| if (!isResultAvailable) { |
| throw new IllegalStateException("was not run"); |
| } |
| return stopTimeNs - startTimeNs; |
| } |
| } |