| /* |
| * 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 sun.java2d.marlin.stats; |
| |
| /** |
| * Generic monitor ie gathers time statistics as nanos. |
| */ |
| public final class Monitor extends StatLong { |
| |
| private static final long INVALID = -1L; |
| |
| private long start = INVALID; |
| |
| public Monitor(final String name) { |
| super(name); |
| } |
| |
| public void start() { |
| start = System.nanoTime(); |
| } |
| |
| public void stop() { |
| final long elapsed = System.nanoTime() - start; |
| if (start != INVALID && elapsed > 0l) { |
| add(elapsed); |
| } |
| start = INVALID; |
| } |
| } |
| |
