PendingZeroCopyWrites

java.lang.Object
- io.netty.channel.uring.PendingZeroCopyWrites

```
final class PendingZeroCopyWrites
extends java.lang.Object
```
Retains buffers until their zero-copy notifications arrive.
freeIdStack is a LIFO stack of available IDs indexing pooled. Submission pops an ID; a failed submission, a primary CQE without MORE, or the NOTIF CQE returns it. This allows out-of-order notifications to recycle IDs independently.
The pool grows up to Short.MAX_VALUE IDs. If all are in use, for example because notifications lag behind new writes, further requests receive increasing long IDs above that range. Their retained buffers are stored in overflow until NOTIF, and these IDs are never reused. Returned pooled IDs are preferred even while overflow requests remain pending.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

(package private) static class PendingZeroCopyWrites.PendingWrite

Field Summary

Fields
Modifier and Type	Field	Description
`private short[]`	`freeIdStack`
`private int`	`freeStackTop`
`private static int`	`MAX_POOLED_ID`
`private long`	`nextOverflowId`
`private LongObjectHashMap<PendingZeroCopyWrites.PendingWrite>`	`overflow`
`private PendingZeroCopyWrites.PendingWrite[]`	`pooled`

Constructor Summary

Constructors
Constructor Description

PendingZeroCopyWrites()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`(package private) long`	`nextUserData()`
`private long`	`nextUserDataSlow()`
`(package private) void`	`recycle(long userData)`
`(package private) PendingZeroCopyWrites.PendingWrite`	`register(long userData)`
`private PendingZeroCopyWrites.PendingWrite`	`registerOverflow(long userData)`
`(package private) void`	`release(long userData)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_POOLED_ID
```
private static final int MAX_POOLED_ID
```
See Also:

Constant Field Values

pooled

private PendingZeroCopyWrites.PendingWrite[] pooled

freeIdStack
```
private short[] freeIdStack
```

freeStackTop
```
private int freeStackTop
```

nextOverflowId
```
private long nextOverflowId
```

overflow

private LongObjectHashMap<PendingZeroCopyWrites.PendingWrite> overflow

Constructor Detail
- PendingZeroCopyWrites
```
PendingZeroCopyWrites()
```

Method Detail

nextUserData
```
long nextUserData()
```

nextUserDataSlow
```
private long nextUserDataSlow()
```

register

PendingZeroCopyWrites.PendingWrite register(long userData)

registerOverflow

private PendingZeroCopyWrites.PendingWrite registerOverflow(long userData)

release
```
void release(long userData)
```

recycle
```
void recycle(long userData)
```