Class BoundedBuffer

java.lang.Object
  BoundedBuffer

public class BoundedBuffer
extends java.lang.Object

Bounded buffer.

Author:

Akitoshi Yoshida, Heinz Kredel.

Field Summary

private java.lang.Object[]	buffer The buffer storage of objects.
private Sema	empty A semaphore to indicate an empty buffer.
private int	front The position of the first filled cell.
private Sema	full A semaphore to indicate a full buffer.
private java.lang.Object	gt
private java.lang.Object	pt
private int	rear The position of the first empty cell.
private int	size The size of the buffer.

Constructor Summary

BoundedBuffer(int init)
Constructs a BoundedBuffer with a desired size.

Method Summary

boolean	empty() Tests if the BoundedBuffer is empty.
java.lang.Object	get() Get an object from the BoundedBuffer.
void	put(java.lang.Object v) Put an object to the BoundedBuffer.

Methods inherited from class java.lang.Object

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

Field Detail

buffer

private java.lang.Object[] buffer

The buffer storage of objects.

size

private int size

The size of the buffer.

front

private int front

The position of the first filled cell.

rear

private int rear

The position of the first empty cell.

empty

private Sema empty

A semaphore to indicate an empty buffer.

full

private Sema full

A semaphore to indicate a full buffer.

pt

private java.lang.Object pt

gt

private java.lang.Object gt

Constructor Detail

BoundedBuffer

public BoundedBuffer(int init)

Constructs a BoundedBuffer with a desired size.

Parameters:

init - the size of the buffer.

Method Detail

empty

public boolean empty()

Tests if the BoundedBuffer is empty. If it is, gives back the value true.

Returns:

The boolean value of (whether the BoundedBuffer is empty or not).

put

public void put(java.lang.Object v)

Put an object to the BoundedBuffer.

Parameters:

v - an object to be put to the buffer.

get

public java.lang.Object get()

Get an object from the BoundedBuffer.