/*
 * Copyright (c) 2014, 2015, Dynatrace and/or its affiliates. All rights reserved.
 * 
 * This file is part of the Lock Contention Tracing Subsystem for the HotSpot
 * Virtual Machine, which is developed at Christian Doppler Laboratory on
 * Monitoring and Evolution of Very-Large-Scale Software Systems. Please
 * contact us at <http://mevss.jku.at/> if you need additional information
 * or have any questions.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work. If not, see <http://www.gnu.org/licenses/>.
 *
 */ 
package sun.evtracing;

public class TraceBufferQueue {

	private static final EventTracing tracing = EventTracing.getEventTracing();

	private final long handle;

	public static TraceBufferQueue fromHandle(long h) {
		return new TraceBufferQueue(h);
	}

	private TraceBufferQueue(long handle) {
		this.handle = handle;
	}

	public long size() {
		return tracing.queueCount(handle);
	}

	public boolean isEmpty() {
		return (size() == 0);
	}

	public TraceBuffer dequeue() {
		return tracing.dequeueBuffer(handle, true);
	}

	public TraceBuffer tryDequeue() {
		return tracing.dequeueBuffer(handle, false);
	}

	public void enqueue(TraceBuffer buffer) {
		tracing.enqueueBuffer(handle, buffer.handle());
	}

	public void resetBufferAndEnqueue(TraceBuffer buffer) {
		tracing.resetAndEnqueueBuffer(handle, buffer.handle());
	}

}