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 int`	`EPOLL_DATA_OFFSET`
`private static 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

All Methods Static Methods Instance Methods Concrete Methods
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 Detail
  - 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 Detail
  - EpollEventArray
```
EpollEventArray(int length)
```
- Method Detail
  - 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)
```