freebsd-dev/sys/dev/xen/console/xencons_ring.h

/*
 * $FreeBSD$
 *
 */
#ifndef _XENCONS_RING_H
#define _XENCONS_RING_H

#define CN_LOCK(l)        								\
		do {											\
				if (panicstr == NULL)					\
                        mtx_lock_spin(&(l));			\
		} while (0)
#define CN_UNLOCK(l)        							\
		do {											\
				if (panicstr == NULL)					\
                        mtx_unlock_spin(&(l));			\
		} while (0)

int xencons_ring_init(void);
int xencons_ring_send(const char *data, unsigned len);
void xencons_rx(char *buf, unsigned len);
void xencons_tx(void);


typedef void (xencons_receiver_func)(char *buf, unsigned len);
void xencons_ring_register_receiver(xencons_receiver_func *f);

void xencons_handle_input(void *unused);
int xencons_has_input(void);

#endif /* _XENCONS_RING_H */