Class EpollEventArray

java.lang.Object
io.netty.channel.epoll.EpollEventArray
@UnstableApi public final class EpollEventArray extends java.lang.Object
This is an internal datastructure which can be directly passed to epoll_wait to reduce the overhead. typedef union epoll_data { void *ptr; int fd; uint32_t u32; uint64_t u64; } epoll_data_t; struct epoll_event { uint32_t events; // Epoll events epoll_data_t data; // User data variable }; We use fd if the epoll_data union to store the actual file descriptor of an AbstractEpollChannel and so be able to map it later.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private CleanableDirectBuffer
    cleanable
     
    private static final int
    EPOLL_DATA_OFFSET
     
    private static final int
    EPOLL_EVENT_SIZE
     
    private int
    length
     
    private java.nio.ByteBuffer
    memory
     
    private long
    memoryAddress
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    EpollEventArray(int length)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    private static int
    calculateBufferCapacity(int capacity)
     
    (package private) int
    events(int index)
    Return the events for the epoll_event on this index.
    (package private) int
    fd(int index)
    Return the file descriptor for the epoll_event on this index.
    (package private) void
    free()
    Free this EpollEventArray.
    private int
    getInt(int index, int offset)
     
    (package private) void
    increase()
    Increase the storage of this EpollEventArray.
    (package private) int
    length()
    Return the length of the EpollEventArray which represent the maximum number of epoll_events that can be stored in it.
    (package private) long
    memoryAddress()
    Return the memoryAddress which points to the start of this EpollEventArray.

    Methods inherited from class java.lang.Object

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

  • Field Details

    • EPOLL_EVENT_SIZE

      private static final int EPOLL_EVENT_SIZE

    • EPOLL_DATA_OFFSET

      private static final int EPOLL_DATA_OFFSET

    • cleanable

      private CleanableDirectBuffer cleanable

    • memory

      private java.nio.ByteBuffer memory

    • memoryAddress

      private long memoryAddress

    • length

      private int length

  • Constructor Details

    • EpollEventArray

      EpollEventArray(int length)

  • Method Details

    • memoryAddress

      long memoryAddress()
      Return the memoryAddress which points to the start of this EpollEventArray.

    • length

      int length()
      Return the length of the EpollEventArray which represent the maximum number of epoll_events that can be stored in it.

    • increase

      void increase()
      Increase the storage of this EpollEventArray.

    • free

      void free()
      Free this EpollEventArray. Any usage after calling this method may segfault the JVM!

    • events

      int events(int index)
      Return the events for the epoll_event on this index.

    • fd

      int fd(int index)
      Return the file descriptor for the epoll_event on this index.

    • getInt

      private int getInt(int index, int offset)

    • calculateBufferCapacity

      private static int calculateBufferCapacity(int capacity)