Field Detail

• data

  private byte[] data

  Actual underlying data

• UNINITIALIZED

  private static final int UNINITIALIZED

  See Also:

  Constant Field Values

• OOM

  private static final int OOM

  See Also:

  Constant Field Values

• nextFreeOffset

  private AtomicInteger nextFreeOffset

  Offset for the next allocation, or the sentinel value -1 which implies that the chunk is still uninitialized.

• allocCount

  private AtomicInteger allocCount

  Total number of allocations satisfied from this buffer

• size

  private final int size

  Size of chunk in bytes

Constructor Detail

• HeapMemStoreLAB.Chunk

  HeapMemStoreLAB.Chunk(int size)

  Create an uninitialized chunk. Note that memory is not allocated yet, so this is cheap.

  Parameters:

  size - in bytes

Method Detail

• init

  public void init()

  Actually claim the memory for this chunk. This should only be called from the thread that constructed the chunk. It is thread-safe against other threads calling alloc(), who will block until the allocation is complete.

• reset

  void reset()

  Reset the offset to UNINITIALIZED before before reusing an old chunk

• alloc

  public int alloc(int size)

  Try to allocate size bytes from the chunk.

  Returns:

  the offset of the successful allocation, or -1 to indicate not-enough-space

• toString

  public String toString()

  Overrides:

  toString in class Object

• getNextFreeOffset

  int getNextFreeOffset()