src/java.desktop/share/classes/sun/java2d/marlin/stats/Monitor.java - master - wstartsev/jdk

src/java.desktop/share/classes/sun/java2d/marlin/stats/Monitor.java

52 строки2 KB

Laurent Bourgès

8297230: Update Marlin2D to 0.9.4.6

23 ноя 2022, 16:29

23 ноя 2022, 16:295b3d86f

/*
 * Copyright (c) 2015, 2022, 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;
    }
}