/*
 * Copyright 2013 (c) Anna Schumaker.
 *
 * Queues are lists of tracks that the user has requested to play next.
 * Users of queues are expected to implement their own save and load functions,
 * and to provide a filled out queue_ops structure during initialization.
 */
#ifndef OCARINA_CORE_QUEUE_H
#define OCARINA_CORE_QUEUE_H

#include <core/file.h>
#include <core/tags/track.h>

struct queue;


struct queue_ops {
	/* Called to tell a higher layer that a queue has been initialized. */
	void *(*qop_init)(struct queue *, void *);
};


struct queue {
	void          *q_private; /* The queue's private data.               */

	const struct queue_ops *q_ops; /* The queue's operations vector.     */
};


/* Called to initialize a queue. */
void queue_init(struct queue *, const struct queue_ops *, void *);

#endif /* OCARINA_CORE_QUEUE_H */