rt-thread-official/components/pthreads/mqueue.h

#ifndef __MQUEUE_H__
#define __MQUEUE_H__

#include <rtthread.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/signal.h>
#include <pthread.h>

struct posix_mq
{
	/* reference count and unlinked */
	rt_uint16_t refcount;
	rt_uint16_t unlinked;

	/* RT-Thread message queue */
	rt_mq_t mq;
	/* next posix mqueue */
	struct posix_mq* next;
};
typedef struct posix_mq posix_mq_t;

struct mqdes
{
	rt_uint32_t flags;
	posix_mq_t* mq;
};
typedef struct mqdes* mqd_t;

struct mq_attr
{
	long mq_flags; 		/* Message queue flags. */
	long mq_maxmsg; 	/* Maximum number of messages. */
	long mq_msgsize; 	/* Maximum message size. */
	long mq_curmsgs; 	/* Number of messages currently queued. */
};

int      mq_close(mqd_t mqdes);
int      mq_getattr(mqd_t mqdes, struct mq_attr *mqstat);
int      mq_notify(mqd_t mqdes, const struct sigevent *notification);
mqd_t    mq_open(const char *name, int oflag, ...);
ssize_t  mq_receive(mqd_t mqdes, char *msg_ptr, size_t msg_len, unsigned *msg_prio);
int      mq_send(mqd_t mqdes, const char *msg_ptr, size_t msg_len, unsigned msg_prio);
int      mq_setattr(mqd_t mqdes, const struct mq_attr *mqstat,
             struct mq_attr *omqstat);
ssize_t  mq_timedreceive(mqd_t mqdes, char *msg_ptr, size_t msg_len,
             unsigned *msg_prio, const struct timespec *abs_timeout);
int      mq_timedsend(mqd_t mqdes, const char *msg_ptr, size_t msg_len, unsigned msg_prio,
             const struct timespec *abs_timeout);

int      mq_unlink(const char *name);

#endif