Package org.glassfish.grizzly.memory

Interface ThreadLocalPool<E>

  • Type Parameters:
    E - Type of Buffer that will be created
    public interface ThreadLocalPool<E>
    A thread local pool used by a MemoryManager to create and modify Buffers
    See Also:
    Buffer, Buffer

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      E allocate​(int size)
      Creates a buffer with a given capacity and limit
      boolean hasRemaining()
      Whether there are elements between the current position and the end
      boolean isLastAllocated​(E oldBuffer)
      Whether the last element in the buffer has been set
      E reallocate​(E oldBuffer, int newSize)
      Creates a new Buffer with a set size and assigns it the data that was held in the old one as long as the given size is not smaller than the data held.
      E reduceLastAllocated​(E buffer)
      Reduces the buffer to the last data allocated
      boolean release​(E underlyingBuffer)
      deallocates the data in the buffer
      int remaining()
      Gets the number of elements between the current position and the limit
      void reset​(E pool)
      Resets the Buffer to empty values and empties the pool
      boolean wantReset​(int size)
      Checks if the size of the Buffer should be reset.

    • Method Detail

      • reset

        void reset​(E pool)
        Resets the Buffer to empty values and empties the pool
        Parameters:
        pool - the buffer to reset

      • allocate

        E allocate​(int size)
        Creates a buffer with a given capacity and limit
        Parameters:
        size - maximum number of elements
        Returns:
        the new buffer
        See Also:
        ByteBuffer.allocate(int)

      • reallocate

        E reallocate​(E oldBuffer,
             int newSize)
        Creates a new Buffer with a set size and assigns it the data that was held in the old one as long as the given size is not smaller than the data held.
        Parameters:
        oldBuffer - Old Buffer containing data
        newSize - The size the new Buffer should be.
        Returns:
        the new Buffer or null if the buffer could not be resized

      • release

        boolean release​(E underlyingBuffer)
        deallocates the data in the buffer
        Parameters:
        underlyingBuffer - the buffer to release
        Returns:
        true if operation successfully completed, false otherwise

      • isLastAllocated

        boolean isLastAllocated​(E oldBuffer)
        Whether the last element in the buffer has been set
        Parameters:
        oldBuffer - the buffer to check
        Returns:
        true if the end of the buffer has been allocated, false otherwise

      • reduceLastAllocated

        E reduceLastAllocated​(E buffer)
        Reduces the buffer to the last data allocated
        Parameters:
        buffer -
        Returns:
        the old buffer data that was removed. This may be null.

      • wantReset

        boolean wantReset​(int size)
        Checks if the size of the Buffer should be reset.
        Parameters:
        size - the desired size of the buffer. If this is less than the current size ofthe buffer then this will return false
        Returns:
        true if the the buffer should be enlarged to hold the desired size

      • remaining

        int remaining()
        Gets the number of elements between the current position and the limit
        Returns:
        number of elements

      • hasRemaining

        boolean hasRemaining()
        Whether there are elements between the current position and the end
        Returns:
        true if there are unused elements, false otherwise