ReaderWriterLock

java.lang.Object
- org.jfree.threads.ReaderWriterLock

```
public class ReaderWriterLock
extends java.lang.Object
```
A reader-writer lock from "Java Threads" by Scott Oak and Henry Wong.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

private static class ReaderWriterLock.ReaderWriterNode
A node for the waiting list.

Field Summary

Fields
Modifier and Type Field Description

private java.util.ArrayList waiters
The waiting threads.

Constructor Summary

Constructors
Constructor Description

ReaderWriterLock()
Default constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`private int`	`firstWriter()`	Returns the index of the first waiting writer.
`private int`	`getIndex(java.lang.Thread t)`	Returns the index of a thread.
`void`	`lockRead()`	Grab the read lock.
`void`	`lockWrite()`	Grab the write lock.
`void`	`unlock()`	Unlock.

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

- Field Detail
  - waiters
```
private java.util.ArrayList waiters
```
    The waiting threads.
- Constructor Detail
  - ReaderWriterLock
```
public ReaderWriterLock()
```
    Default constructor.
- Method Detail
  - lockRead
```
public void lockRead()
```
    Grab the read lock.
  - lockWrite
```
public void lockWrite()
```
    Grab the write lock.
  - unlock
```
public void unlock()
```
    Unlock.
  - firstWriter
```
private int firstWriter()
```
    Returns the index of the first waiting writer.
    
    Returns:
    
    The index.
  - getIndex
```
private int getIndex(java.lang.Thread t)
```
    Returns the index of a thread.
    
    Parameters:
    
    t - the thread.
    
    Returns:
    
    The index.