#ifndef _MQUEUE_H
#define _MQUEUE_H

#include <sys/types.h>
#include <signal.h>
#include <fcntl.h>

typedef int mqd_t;

struct mq_attr {
  long  mq_flags;	/* O_NONBLOCK or 0 */
  long  mq_maxmsg;	/* Maximum number of messages in the queue */
  long  mq_msgsize;	/* Maximum size of one message in bytes */
  long  mq_curmsgs;	/* Current number of messages in the queue */
  long  __pad[2];
};

#define MQ_PRIO_MAX	0x7FFFFFFE

int	mq_close (mqd_t);
int	mq_getattr (mqd_t, struct mq_attr *);
int	mq_notify (mqd_t, const struct sigevent *);
mqd_t	mq_open (const char *, int, ...);
ssize_t	mq_receive (mqd_t, char *, size_t, unsigned int *);
int	mq_send (mqd_t, const char *, size_t, unsigned int);
int	mq_setattr (mqd_t, const struct mq_attr *, struct mq_attr *);
int	mq_unlink (const char *);

#endif /* mqueue.h */