src/base/queue.c

/*
 * Copyright 2016 Google Inc.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include "base/queue.h"

QueueNode *queue_pop(Queue *queue)
{
	QueueNode *ret = queue->head;

	if (ret) {
		queue->head = ret->next;
		ret->next = NULL;
	}
	if (!queue->head)
		queue->tail = NULL;

	return ret;
}

void queue_push(QueueNode *node, Queue *queue)
{
	if (queue_empty(queue))
		queue->head = node;
	node->next = NULL;
	queue->tail->next = node;
	queue->tail = node;
}