/*

 * Copyright (c) 2014 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 org.openjdk.bench.java.nio;

import org.openjdk.jmh.annotations.Benchmark;

import org.openjdk.jmh.annotations.BenchmarkMode;

import org.openjdk.jmh.annotations.Mode;

import org.openjdk.jmh.annotations.OutputTimeUnit;

import org.openjdk.jmh.annotations.Param;

import org.openjdk.jmh.annotations.Scope;

import org.openjdk.jmh.annotations.State;

import java.nio.ByteBuffer;

import java.util.concurrent.TimeUnit;

/**

 * Benchmark operations on java.nio.Buffer.

 */

@BenchmarkMode(Mode.AverageTime)

@OutputTimeUnit(TimeUnit.NANOSECONDS)

@State(Scope.Thread)

public class ByteBuffers {

    @Param({"10", "1000", "100000"})

    private int size;

    public byte dummyByte;

    public char dummyChar;

    public short dummyShort;

    public int dummyInt;

    public long dummyLong;

    public float dummyFloat;

    public double dummyDouble;

    // ---------------- BULK GET TESTS

    @Benchmark

    public byte[] testBulkGet() {

        return innerBufferBulkGet(ByteBuffer.allocate(size));

    }

    @Benchmark

    public byte[] testDirectBulkGet() {

        return innerBufferBulkGet(ByteBuffer.allocateDirect(size));

    }

    // ---------------- BULK PUT TESTS

    @Benchmark

    public byte[] testBulkPut() {

        return innerBufferBulkPut(ByteBuffer.allocate(size));

    }

    @Benchmark

    public byte[] testDirectBulkPut() {

        return innerBufferBulkPut(ByteBuffer.allocateDirect(size));

    }

    // ---------------- SINGLE GET TESTS

    @Benchmark

    public int testSingleGetByte() {

        return innerSingleGetByte(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public int testSingleGetChar() {

        return innerSingleGetChar(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public int testSingleGetShort() {

        return innerSingleGetShort(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public int testSingleGetInt() {

        return innerSingleGetInt(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public long testSingleGetLong() {

        return innerSingleGetLong(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public float testSingleGetFloat() {

        return innerSingleGetFloat(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public double testSingleGetDouble() {

        return innerSingleGetDouble(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public int testDirectSingleGetByte() {

        return innerSingleGetByte(ByteBuffer.allocateDirect(1000));

    }

    @Benchmark

    public int testDirectSingleGetChar() {

        return innerSingleGetChar(ByteBuffer.allocateDirect(1000));

    }

    @Benchmark

    public int testDirectSingleGetShort() {

        return innerSingleGetShort(ByteBuffer.allocateDirect(1000));

    }

    @Benchmark

    public int testDirectSingleGetInt() {

        return innerSingleGetInt(ByteBuffer.allocateDirect(1000));

    }

    @Benchmark

    public long testDirectSingleGetLong() {

        return innerSingleGetLong(ByteBuffer.allocateDirect(1000));

    }

    @Benchmark

    public float testDirectSingleGetFloat() {

        return innerSingleGetFloat(ByteBuffer.allocateDirect(1000));

    }

    @Benchmark

    public double testDirectSingleGetDouble() {

        return innerSingleGetDouble(ByteBuffer.allocateDirect(1000));

    }

    // ---------------- SINGLE PUT TESTS

    @Benchmark

    public void testSinglePutByte() {

        innerSinglePutByte(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public void testSinglePutChar() {

        innerSinglePutChar(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public void testSinglePutShort() {

        innerSinglePutShort(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public void testSinglePutInt() {

        innerSinglePutInt(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public void testSinglePutLong() {

        innerSinglePutLong(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public void testSinglePutFloat() {

        innerSinglePutFloat(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public void testSinglePutDouble() {

        innerSinglePutDouble(ByteBuffer.allocate(1000));

    }

    @Benchmark

    public void testDirectSinglePutByte() {

        innerSinglePutByte(ByteBuffer.allocateDirect(1000));

    }

    @Benchmark

    public void testDirectSinglePutChar() {

        innerSinglePutChar(ByteBuffer.allocateDirect(1000));

    }

    @Benchmark

    public void testDirectSinglePutShort() {

        innerSinglePutShort(ByteBuffer.allocateDirect(1000));

    }

    @Benchmark

    public void testDirectSinglePutInt() {

        innerSinglePutInt(ByteBuffer.allocateDirect(1000));

    }

    @Benchmark

    public void testDirectSinglePutLong() {

        innerSinglePutLong(ByteBuffer.allocateDirect(1000));

    }

    @Benchmark

    public void testDirectSinglePutFloat() {

        innerSinglePutFloat(ByteBuffer.allocateDirect(1000));

    }

    @Benchmark

    public void testDirectSinglePutDouble() {

        innerSinglePutDouble(ByteBuffer.allocateDirect(1000));

    }

    // ---------------- HELPER METHODS

    private byte[] innerBufferBulkGet(ByteBuffer bb) {

        byte[] dummyByteArray = new byte[bb.capacity()];

        bb.get(dummyByteArray);

        bb.flip();

        return dummyByteArray;

    }

    private byte[] innerBufferBulkPut(ByteBuffer bb) {

        byte[] dummyByteArray = new byte[bb.capacity()];

        bb.put(dummyByteArray);

        bb.flip();

        return dummyByteArray;

    }

    private int innerSingleGetByte(ByteBuffer bb) {

        int r = 0;

        for (int i = 0; i < bb.capacity(); i++) {

            r += bb.get(i);

        }

        return r;

    }

    private int innerSingleGetChar(ByteBuffer bb) {

        int r = 0;

        for (int i = 0; i < bb.capacity(); i += 2) {

            r += bb.getChar(i);

        }

        return r;

    }

    private int innerSingleGetShort(ByteBuffer bb) {

        int r = 0;

        for (int i = 0; i < bb.capacity(); i += 2) {

            r += bb.getShort(i);

        }

        return r;

    }

    private int innerSingleGetInt(ByteBuffer bb) {

        int r = 0;

        for (int i = 0; i < bb.capacity(); i += 4) {

            r += bb.getInt(i);

        }

        return r;

    }

    private long innerSingleGetLong(ByteBuffer bb) {

        long r = 0;

        for (int i = 0; i < bb.capacity(); i += 8) {

            r += bb.getLong(i);

        }

        return r;

    }

    private float innerSingleGetFloat(ByteBuffer bb) {

        float r = 0;

        for (int i = 0; i < bb.capacity(); i += 4) {

            r += bb.getFloat(i);

        }

        return r;

    }

    private double innerSingleGetDouble(ByteBuffer bb) {

        double d = 0;

        for (int i = 0; i < bb.capacity(); i += 8) {

            d += bb.getDouble(i);

        }

        return d;

    }

    private void innerSinglePutByte(ByteBuffer bb) {

        for (int i = 0; i < bb.capacity(); i++) {

            bb.put(i, dummyByte);

        }

    }

    private void innerSinglePutChar(ByteBuffer bb) {

        for (int i = 0; i < bb.capacity(); i += 2) {

            bb.putChar(i, dummyChar);

        }

    }

    private void innerSinglePutShort(ByteBuffer bb) {

        for (int i = 0; i < bb.capacity(); i += 2) {

            bb.putShort(i, dummyShort);

        }

    }

    private void innerSinglePutInt(ByteBuffer bb) {

        for (int i = 0; i < bb.capacity(); i += 4) {

            bb.putInt(i, dummyInt);

        }

    }

    private void innerSinglePutLong(ByteBuffer bb) {

        for (int i = 0; i < bb.capacity(); i += 8) {

            bb.putLong(i, dummyLong);

        }

    }

    private void innerSinglePutFloat(ByteBuffer bb) {

        for (int i = 0; i < bb.capacity(); i += 4) {

            bb.putFloat(i, dummyFloat);

        }

    }

    private void innerSinglePutDouble(ByteBuffer bb) {

        for (int i = 0; i < bb.capacity(); i += 8) {

            bb.putDouble(i, dummyDouble);

        }

    }

}