/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

package javax.microedition.lcdui;

import javax.microedition.lcdui.EventDispatcher.LCDUIEvent;

final class EventQueue {

	LCDUIEvent first;

	LCDUIEvent last;

	EventQueue() {

	}

	synchronized void push(LCDUIEvent event) {

		event.next = null;

		if(isEmpty()) {

			first = last = event;

		} else {

			last.next = event;

			last = event;

		}

	}

	synchronized LCDUIEvent pop() {

		if (isEmpty()) {

			return null;

		}

		LCDUIEvent event = first;

		first = first.next;

		event.next = null;

		if(isEmpty()) {

			last = null;

		}

		return event;

	}

	synchronized boolean isEmpty() {

		return first == null;

	}

}