psimjava
Class Pqueue

java.lang.Object
  psimjava.Pqueue

public class Pqueue
extends java.lang.Object

PsimJ Java package for OO simulation

Object-oriented simulation package, process interaction approach. PsimJ (C)Jose M. Garrido, June 2000, August 2003, 2007

(C) J. M. Garrido. June 2000, 2003, 2004, 2007 Priority queue class for PsimJ.

PsimJ package, process interaction approach to simulation. (C) J. M. Garrido, June 2000, August 2003, 2004, 2007

Constructor Summary

Pqueue(java.lang.String a_name, int max_prio)
Initializes priority queue object with title and maximum priority to use.

Pqueue(java.lang.String a_name, int max_prio, int maxsize)
Initializes priority queue object with title, maximum number of priorities to use, and the capacity of the component queues.

Method Summary

boolean	empty() Returns a true if total queue is empty, otherwise, return false
boolean	full(int prio) Returns true if queue is full of processes with priority prio, returns false otherwise
void	into(java.lang.Object ps) Enqueue the specified object (process) into the priority queue
int	length() Returns the total length of the priority queue
java.lang.Object	llast() get last object enqueued to lowest priority queue
int	maxprio() Return the maximum priority used
java.lang.Object	out() Dequeue object (process) with the highest priority
void	pback(java.lang.Object ps) Place the specified object (process) at the head of the queue
java.lang.Object	plast(int prio) Get last object enqueued with the specified priority
int	plength(int prio) Returns the length of a particular queue with given priority
java.lang.Object	pllast(int pr) Get last object enqueued into lowest priority queue, down to the specified priority
java.lang.Object	pout(int prio) Dequeues an object (process) with the specified priority
void	premov(java.lang.Object ps) Remove the specified object (process) from the priority queue

Methods inherited from class java.lang.Object

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

Constructor Detail

Pqueue

public Pqueue(java.lang.String a_name,
              int max_prio)

Initializes priority queue object with title and maximum priority to use.

Pqueue

public Pqueue(java.lang.String a_name,
              int max_prio,
              int maxsize)

Initializes priority queue object with title, maximum number of priorities to use, and the capacity of the component queues.

Parameters:

s_name - title for the priority queue

max_prio - maximum priority to use

maxsize - capacity (maximum size) of the component queues

Method Detail

length

public int length()

Returns the total length of the priority queue

empty

public boolean empty()

Returns a true if total queue is empty, otherwise, return false

plength

public int plength(int prio)

Returns the length of a particular queue with given priority

Parameters:

prio - priority of the queue

full

public boolean full(int prio)

Returns true if queue is full of processes with priority prio, returns false otherwise

maxprio

public int maxprio()

Return the maximum priority used

into

public void into(java.lang.Object ps)

Enqueue the specified object (process) into the priority queue

Parameters:

ps - The object (process) to insert into the queue

premov

public void premov(java.lang.Object ps)

Remove the specified object (process) from the priority queue

Parameters:

ps - The object (process) to remove from the queue

pback

public void pback(java.lang.Object ps)

Place the specified object (process) at the head of the queue

Parameters:

ps - The object (process) to place into the queue

out

public java.lang.Object out()

Dequeue object (process) with the highest priority

pout

public java.lang.Object pout(int prio)

Dequeues an object (process) with the specified priority

Parameters:

prio - Priority of the object to dequeue

plast

public java.lang.Object plast(int prio)

Get last object enqueued with the specified priority

Parameters:

prio - Priority of the object to retrieve

llast

public java.lang.Object llast()

get last object enqueued to lowest priority queue

pllast

public java.lang.Object pllast(int pr)

Get last object enqueued into lowest priority queue, down to the specified priority