Function mq_send

components/libc/posix/ipc/mqueue.c:235–255

* @brief Sends a message to a message queue. * @param id Message queue descriptor. * @param msg_ptr Pointer to the buffer containing the message to be sent. * @param msg_len Size of the message to be sent. * @param msg_prio Priority of the message to be sent. * @return Upon successful completion, returns 0; * otherwise, returns -1 and sets errno to indicate the error. *

 *          and the function returns -1.
 */
int mq_send(mqd_t id, const char *msg_ptr, size_t msg_len, unsigned msg_prio)
{
    rt_mq_t mq;
    rt_err_t result;
    struct mqueue_file *mq_file;
    mq_file = fd_get(id)->vnode->data;
    mq = (rt_mq_t)mq_file->data;

    if ((mq == RT_NULL) || (msg_ptr == RT_NULL))
    {
        rt_set_errno(EINVAL);
        return -1;
    }
    result = rt_mq_send_wait_prio(mq, (void *)msg_ptr, msg_len, msg_prio, 0, RT_UNINTERRUPTIBLE);
    if (result == RT_EOK)
        return 0;

    rt_set_errno(EBADF);

    return -1;
}
RTM_EXPORT(mq_send);

/**