edu.utah.janosvm.sys
Class EventQueue

java.lang.Object
  |
  +--edu.utah.janosvm.sys.List
        |
        +--edu.utah.janosvm.sys.EventQueue

All Implemented Interfaces:

java.lang.Runnable

final class EventQueue

extends List

implements java.lang.Runnable

An internal queue/dispatcher for events.

Author:

Tim Stack, Utah Janos Team

See Also:

EventHandler, Event

Fields inherited from class edu.utah.janosvm.sys.List

head, tail

Constructor Summary

(package private)

EventQueue()

Method Summary

(package private) Event	dequeue() Fetch (and remove) the head event from this queue.
void	enqueue(Event event, EventHandler eh, int type) Enqueue an event.
void	run() Run the handler thread for this event queue.
java.lang.String	toString()

Methods inherited from class edu.utah.janosvm.sys.List

addHead, addTail, count, isEmpty, remHead, remTail

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait, wait0

Constructor Detail

EventQueue

EventQueue()

Method Detail

enqueue

public void enqueue(Event event,
                    EventHandler eh,
                    int type)

Enqueue an event. Because the handler and type are stored in the event, do not enqueue the same event more than once.

Parameters:

event - An appropriately typed Event object to queue.

eh - The target of the event.

type - The type of event.

dequeue

Event dequeue()

Fetch (and remove) the head event from this queue.

Returns:

An Event from the front of the queue.

run

public void run()

Run the handler thread for this event queue. The handler thread will dequeue each event and run the event's associated {@linkplain Event#getHandler handler}.

Specified by:

run in interface java.lang.Runnable

toString

public java.lang.String toString()

Overrides:

toString in class List