#ifndef	XFRAME_QUEUE_H
#define	XFRAME_QUEUE_H

#include <linux/list.h>
#include <linux/spinlock.h>
#include "xdefs.h"

#define	XFRAME_QUEUE_MARGIN	10

struct xframe_queue {
	struct list_head head;
	bool disabled;
	unsigned int count;
	unsigned int max_count;
	unsigned int steady_state_count;
	spinlock_t lock;
	const char *name;
	void *priv;
	/* statistics */
	unsigned int worst_count;
	unsigned int overflows;
	unsigned long worst_lag_usec;	/* since xframe creation */
};

void xframe_queue_init(struct xframe_queue *q, unsigned int steady_state_count,
		       unsigned int max_count, const char *name, void *priv);
__must_check bool xframe_enqueue(struct xframe_queue *q, xframe_t *xframe);
__must_check xframe_t *xframe_dequeue(struct xframe_queue *q);
void xframe_queue_clearstats(struct xframe_queue *q);
void xframe_queue_disable(struct xframe_queue *q, bool disabled);
void xframe_queue_clear(struct xframe_queue *q);
uint xframe_queue_count(struct xframe_queue *q);

#endif /* XFRAME_QUEUE_ */
