Function _send_recv_timeout

components/lwp/lwp_ipc.c:476–512

* Send data through an IPC channel, wait for the reply or not. */

 * Send data through an IPC channel, wait for the reply or not.
 */
static rt_err_t _send_recv_timeout(rt_channel_t ch, rt_channel_msg_t data, int need_reply, rt_channel_msg_t data_ret, rt_int32_t time)
{
    rt_ipc_msg_t msg;
    rt_err_t rc = -RT_ERROR;

    if (need_reply)
    {
        RT_DEBUG_NOT_IN_INTERRUPT;
    }

    if (ch == RT_NULL)
    {
        rc = -RT_EIO;
    }
    else
    {
        if (rt_object_get_type(&ch->parent.parent) != RT_Object_Class_Channel)
        {
            rc = -RT_EIO;
        }
        else if (need_reply && time == 0)
        {
            rc = -RT_ETIMEOUT;
        }
        else
        {
            /* allocate an IPC message */
            msg = _ipc_msg_alloc();
            if (!msg)
                rc = -RT_ENOMEM;
            else
                rc = _do_send_recv_timeout(ch, data, need_reply, data_ret, time, msg);
        }
    }

    return rc;
}

static rt_err_t _do_send_recv_timeout(rt_channel_t ch, rt_channel_msg_t data, int need_reply, rt_channel_msg_t data_ret, rt_int32_t time, rt_ipc_msg_t msg)
{