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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 2016 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.kqueue;

import io.netty.channel.unix.Buffer;
import io.netty.util.internal.PlatformDependent;

import java.nio.ByteBuffer;

import static io.netty.channel.unix.Limits.SIZEOF_JLONG;
import static io.netty.util.internal.ObjectUtil.checkPositive;

final class NativeLongArray {
    private ByteBuffer memory;
    private long memoryAddress;
    private int capacity;
    private int size;

    NativeLongArray(int capacity) {
        this.capacity = checkPositive(capacity, "capacity");
        memory = Buffer.allocateDirectWithNativeOrder(calculateBufferCapacity(capacity));
        memoryAddress = Buffer.memoryAddress(memory);
    }

    private static int idx(int index) {
        return index * SIZEOF_JLONG;
    }

    private static int calculateBufferCapacity(int capacity) {
        return capacity * SIZEOF_JLONG;
    }

    void add(long value) {
        reallocIfNeeded();
        if (PlatformDependent.hasUnsafe()) {
            PlatformDependent.putLong(memoryOffset(size), value);
        } else {
            memory.putLong(idx(size), value);
        }
        ++size;
    }

    void clear() {
        size = 0;
    }

    boolean isEmpty() {
        return size == 0;
    }

    int size() {
        return size;
    }

    void free() {
        Buffer.free(memory);
        memoryAddress = 0;
    }

    long memoryAddress() {
        return memoryAddress;
    }

    long memoryAddressEnd() {
        return memoryOffset(size);
    }

    private long memoryOffset(int index) {
        return memoryAddress + idx(index);
    }

    private void reallocIfNeeded() {
        if (size == capacity) {
            // Double the capacity while it is "sufficiently small", and otherwise increase by 50%.
            int newLength = capacity <= 65536 ? capacity << 1 : capacity + capacity >> 1;
            ByteBuffer buffer = Buffer.allocateDirectWithNativeOrder(calculateBufferCapacity(newLength));
            // Copy over the old content of the memory and reset the position as we always act on the buffer as if
            // the position was never increased.
            memory.position(0).limit(size);
            buffer.put(memory);
            buffer.position(0);

            Buffer.free(memory);
            memory = buffer;
            memoryAddress = Buffer.memoryAddress(buffer);
            capacity = newLength;
        }
    }

    @Override
    public String toString() {
        return "memoryAddress: " + memoryAddress + " capacity: " + capacity + " size: " + size;
    }
}