/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2013 Steven Willems
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package be.idevelop.fiber;

import java.nio.ByteBuffer;

class ByteBufferPool {

    private final ByteBuffer byteBuffer;

    private int start;

    ByteBufferPool() {
        this(1024 * 1024 * 64);
    }

    ByteBufferPool(int sizeInBytes) {
        byteBuffer = ByteBuffer.allocateDirect(sizeInBytes);
        start = byteBuffer.position();
    }

    public synchronized ByteBuffer allocate(int bufferSize) {
        if (byteBuffer.limit() - start < bufferSize) {
            start = byteBuffer.position();
        }
        int end = start + bufferSize;
        ByteBuffer allocated = (ByteBuffer) byteBuffer.slice().position(start).limit(end).mark();
        start = end;
        return allocated;
    }
}

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2013 Steven Willems
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package be.idevelop.fiber;

import java.nio.ByteBuffer;

class ByteBufferPool {

    private static final int DEFAULT_BUFFER_POOL_SIZE = 1024 * 1024 * 64;

    private final ByteBuffer byteBuffer;

    private int start;

    ByteBufferPool() {
        this(DEFAULT_BUFFER_POOL_SIZE);
    }

    ByteBufferPool(int sizeInBytes) {
        byteBuffer = ByteBuffer.allocateDirect(sizeInBytes);
        start = byteBuffer.position();
    }

    public synchronized ByteBuffer allocate(int bufferSize) {
        if (byteBuffer.limit() - start < bufferSize) {
            start = byteBuffer.position();
        }
        int end = start + bufferSize;
        ByteBuffer allocated = (ByteBuffer) byteBuffer.slice().position(start).limit(end).mark();
        start = end;
        return allocated;
    }
}

fix sonar rules