IndexedQueueSizeUtil

java.lang.Object
- org.jctools.queues.IndexedQueueSizeUtil

```
public final class IndexedQueueSizeUtil
extends java.lang.Object
```
A note to maintainers on index assumptions: in a single threaded world it would seem intuitive to assume:
```
 producerIndex >= consumerIndex
 
```
As an invariant, but in a concurrent, long running settings all of the following need to be considered:
- consumerIndex > producerIndex : due to counter overflow (unlikey with longs, but easy to reason)
- consumerIndex > producerIndex : due to consumer FastFlow like implementation discovering the element before the counter is updated.
- producerIndex - consumerIndex < 0 : due to above.
- producerIndex - consumerIndex > Integer.MAX_VALUE : as linked buffers allow constructing queues with more than Integer.MAX_VALUE elements.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static interface IndexedQueueSizeUtil.IndexedQueue

Constructor Summary

Constructors
Constructor Description

IndexedQueueSizeUtil()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static boolean`	`isEmpty(IndexedQueueSizeUtil.IndexedQueue iq)`
`static int`	`size(IndexedQueueSizeUtil.IndexedQueue iq)`

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

Constructor Detail
- IndexedQueueSizeUtil
```
public IndexedQueueSizeUtil()
```

Method Detail

size

public static int size(IndexedQueueSizeUtil.IndexedQueue iq)

isEmpty

public static boolean isEmpty(IndexedQueueSizeUtil.IndexedQueue iq)