Class PoolSubpage<T>

java.lang.Object
io.netty.buffer.PoolSubpage<T>
All Implemented Interfaces:
PoolSubpageMetric
final class PoolSubpage<T> extends java.lang.Object implements PoolSubpageMetric

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private final long[]
    bitmap
     
    private final int
    bitmapLength
     
    (package private) final PoolChunk<T>
    chunk
     
    (package private) boolean
    doNotDestroy
     
    (package private) final int
    elemSize
     
    (package private) final int
    headIndex
     
    (package private) final java.util.concurrent.locks.ReentrantLock
    lock
     
    private final int
    maxNumElems
     
    (package private) PoolSubpage<T>
    next
     
    private int
    nextAvail
     
    private int
    numAvail
     
    private final int
    pageShifts
     
    (package private) PoolSubpage<T>
    prev
     
    private final int
    runOffset
     
    private final int
    runSize
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    PoolSubpage(int headIndex)
    Special constructor that creates a linked list head
    PoolSubpage(PoolSubpage<T> head, PoolChunk<T> chunk, int pageShifts, int runOffset, int runSize, int elemSize)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    private void
    addToPool(PoolSubpage<T> head)
     
    (package private) long
    allocate()
    Returns the bitmap index of the subpage allocation.
    (package private) void
    destroy()
     
    int
    elementSize()
    Return the size (in bytes) of the elements that will be allocated.
    private int
    findNextAvail()
     
    private int
    findNextAvail0(int i, long bits)
     
    (package private) boolean
    free(PoolSubpage<T> head, int bitmapIdx)
     
    private int
    getNextAvail()
     
    (package private) boolean
    isDoNotDestroy()
     
    (package private) void
    lock()
     
    int
    maxNumElements()
    Return the number of maximal elements that can be allocated out of the sub-page.
    int
    numAvailable()
    Return the number of available elements to be allocated.
    int
    pageSize()
    Return the page size (in bytes) of this page.
    private void
    removeFromPool()
     
    private void
    setNextAvail(int bitmapIdx)
     
    private long
    toHandle(int bitmapIdx)
     
    java.lang.String
    toString()
     
    (package private) void
    unlock()
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

  • Field Details

    • chunk

      final PoolChunk<T> chunk

    • elemSize

      final int elemSize

    • pageShifts

      private final int pageShifts

    • runOffset

      private final int runOffset

    • runSize

      private final int runSize

    • bitmap

      private final long[] bitmap

    • bitmapLength

      private final int bitmapLength

    • maxNumElems

      private final int maxNumElems

    • headIndex

      final int headIndex

    • prev

      PoolSubpage<T> prev

    • next

      PoolSubpage<T> next

    • doNotDestroy

      boolean doNotDestroy

    • nextAvail

      private int nextAvail

    • numAvail

      private int numAvail

    • lock

      final java.util.concurrent.locks.ReentrantLock lock

  • Constructor Details

    • PoolSubpage

      PoolSubpage(int headIndex)
      Special constructor that creates a linked list head

    • PoolSubpage

      PoolSubpage(PoolSubpage<T> head, PoolChunk<T> chunk, int pageShifts, int runOffset, int runSize, int elemSize)

  • Method Details

    • allocate

      long allocate()
      Returns the bitmap index of the subpage allocation.

    • free

      boolean free(PoolSubpage<T> head, int bitmapIdx)
      Returns:
      true if this subpage is in use. false if this subpage is not used by its chunk and thus it's OK to be released.

    • addToPool

      private void addToPool(PoolSubpage<T> head)

    • removeFromPool

      private void removeFromPool()

    • setNextAvail

      private void setNextAvail(int bitmapIdx)

    • getNextAvail

      private int getNextAvail()

    • findNextAvail

      private int findNextAvail()

    • findNextAvail0

      private int findNextAvail0(int i, long bits)

    • toHandle

      private long toHandle(int bitmapIdx)

    • toString

      public java.lang.String toString()
      Overrides:
      toString in class java.lang.Object

    • maxNumElements

      public int maxNumElements()
      Description copied from interface: PoolSubpageMetric
      Return the number of maximal elements that can be allocated out of the sub-page.
      Specified by:
      maxNumElements in interface PoolSubpageMetric

    • numAvailable

      public int numAvailable()
      Description copied from interface: PoolSubpageMetric
      Return the number of available elements to be allocated.
      Specified by:
      numAvailable in interface PoolSubpageMetric

    • elementSize

      public int elementSize()
      Description copied from interface: PoolSubpageMetric
      Return the size (in bytes) of the elements that will be allocated.
      Specified by:
      elementSize in interface PoolSubpageMetric

    • pageSize

      public int pageSize()
      Description copied from interface: PoolSubpageMetric
      Return the page size (in bytes) of this page.
      Specified by:
      pageSize in interface PoolSubpageMetric

    • isDoNotDestroy

      boolean isDoNotDestroy()

    • destroy

      void destroy()

    • lock

      void lock()

    • unlock

      void unlock()