jdk.internal.perf.Perf$_native Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of qbicc-rt-java.base Show documentation

The Qbicc builder for the java.base JDK module

There is a newer version: 17.alpha.0.57

/*
 * This code is based on OpenJDK source file(s) which contain the following copyright notice:
 *
 * ------
 * Copyright (c) 2001, 2021, 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.
 * ------
 *
 * This file may contain additional modifications which are Copyright (c) Red Hat and other
 * contributors.
 */

package jdk.internal.perf;

import java.nio.ByteBuffer;
import java.util.Arrays;

import org.qbicc.rt.annotation.Tracking;

@Tracking("src/java.base/share/classes/jdk/internal/perf/Perf.java")
public class Perf$_native {
    private static void registerNatives() {
        // no-op
    }

    public ByteBuffer createLong(String name, int variability, int units, long value) {
        ByteBuffer buf = ByteBuffer.allocate(8);
        buf.putLong(0, value);
        return buf;
    }

    public ByteBuffer createByteArray(String name, int variability, int units, byte[] value, int maxLength) {
        return ByteBuffer.wrap(value == null ? new byte[maxLength] : Arrays.copyOf(value, maxLength));
    }

    public long highResCounter() {
        return System.nanoTime();
    }

    public long highResFrequency() {
        return 1_000_000_000L;
    }
}