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package org.xerial.snappy.pool;

import java.nio.ByteBuffer;

/**
 * Makes various types of buffers available for use and potential re-use.
 * 
 * 

* Implementations must be safe for concurrent use by multiple threads. *

* * @author Brett Okken */ public interface BufferPool { /** * Returns a {@code byte[]} of size or greater length. * @param size The minimum size array required. Must be {@code >= 0}. * @return A {@code byte[]} with length of at least size. * @see #releaseArray(byte[]) */ public byte[] allocateArray(int size); /** * Returns instance to pool for potential future reuse. *

* Must not be returned more than 1 time. Must not be used by caller after return. *

* @param buffer Instance to return to pool. Must not be {@code null}. * Must not be returned more than 1 time. Must not be used by caller after return. */ public void releaseArray(byte[] buffer); /** * Returns a {@link ByteBuffer#allocateDirect(int) direct ByteBuffer} of size or * greater {@link ByteBuffer#capacity() capacity}. * @param size The minimum size buffer required. Must be {@code >= 0}. * @return A {@code ByteBuffer} of size or greater {@link ByteBuffer#capacity() capacity}. * @see #releaseDirect(ByteBuffer) * @see ByteBuffer#allocateDirect(int) */ public ByteBuffer allocateDirect(int size); /** * Returns instance to pool for potential future reuse. *

* Must not be returned more than 1 time. Must not be used by caller after return. *

* @param buffer Instance to return to pool. Must not be {@code null}. * Must not be returned more than 1 time. Must not be used by caller after return. */ public void releaseDirect(ByteBuffer buffer); }




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