rt-thread/components/pthreads/mqueue.h

/*
 * File      : mqueue.h
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2012, RT-Thread Development Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 */

#ifndef __MQUEUE_H__
#define __MQUEUE_H__

#include <rtthread.h>
#include <pthread.h>

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

    /* RT-Thread message queue */
    rt_mq_t mq;
    /* next posix mqueue */
    struct mqdes* next;
};
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