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package com.sun.grizzly.memory.slab;

import java.nio.ByteBuffer;

/** 
 * A simple non-pooled implementation of an Allocator.
 * It creates a Slab whenever the current Slab is
 * exhausted, and relies on the garbage collector to recover the space.
 * Generally this should only be used with BufferType HEAP.
 * @author Ken Cavanaugh 
 */
public class SlabMemoryManagerImpl extends SlabMemoryManagerBase {

    private final int _maxAllocationSize;
    private final boolean _bufferType;

    public SlabMemoryManagerImpl(
            final int maxAllocationSize,
            final boolean bufferType) {      
        this._maxAllocationSize = maxAllocationSize;
        this._bufferType = bufferType;
    }

    public int maxAllocationSize() {

        return _maxAllocationSize;
    }

    public boolean bufferType() {

        return _bufferType;
    }

    @Override
    public void dispose(final Slab slab, final ByteBuffer store) {
        // NO-OP in this version
    }

    @Override
    Slab obtainSlab() {
        return new Slab(_maxAllocationSize, _bufferType);
    }

    @Override
    void releaseSlab(final Slab slab) {
        // NO-OP in this version
    }
}