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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2018 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.channel.unix;

import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.UnstableApi;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;

@UnstableApi
public final class Buffer {

    private Buffer() { }

    /**
     * Free the direct {@link ByteBuffer}.
     */
    public static void free(ByteBuffer buffer) {
        PlatformDependent.freeDirectBuffer(buffer);
    }

    /**
     * Returns a new {@link ByteBuffer} which has the same {@link ByteOrder} as the native order of the machine.
     */
    public static ByteBuffer allocateDirectWithNativeOrder(int capacity) {
        return ByteBuffer.allocateDirect(capacity).order(
                PlatformDependent.BIG_ENDIAN_NATIVE_ORDER ? ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN);
    }

    /**
     * Returns the memory address of the given direct {@link ByteBuffer}.
     */
    public static long memoryAddress(ByteBuffer buffer) {
        assert buffer.isDirect();
        if (PlatformDependent.hasUnsafe()) {
            return PlatformDependent.directBufferAddress(buffer);
        }
        return memoryAddress0(buffer);
    }

    /**
     * Returns the size of a pointer.
     */
    public static int addressSize() {
        if (PlatformDependent.hasUnsafe()) {
            return PlatformDependent.addressSize();
        }
        return addressSize0();
    }

    // If Unsafe can not be used we will need to do JNI calls.
    private static native int addressSize0();
    private static native long memoryAddress0(ByteBuffer buffer);
}