Function rpmsgdev_send_recv

drivers/misc/rpmsgdev.c:800–852

 ****************************************************************************/

static int rpmsgdev_send_recv(FAR struct rpmsgdev_s *priv,
                              uint32_t command, bool copy,
                              FAR struct rpmsgdev_header_s *msg,
                              int len, FAR void *data)
{
  struct rpmsgdev_cookie_s cookie;
  int ret;

  memset(&cookie, 0, sizeof(cookie));
  nxsem_init(&cookie.sem, 0, 0);

  if (data != NULL)
    {
      cookie.data = data;
    }
  else if (copy)
    {
      cookie.data = msg;
    }

  msg->command = command;
  msg->result  = -ENXIO;
  msg->cookie  = (uintptr_t)&cookie;

  if (copy)
    {
      ret = rpmsg_send(&priv->ept, msg, len);
    }
  else
    {
      ret = rpmsg_send_nocopy(&priv->ept, msg, len);
    }

  if (ret < 0)
    {
      if (copy == false)
        {
          rpmsg_release_tx_buffer(&priv->ept, msg);
        }

      goto fail;
    }

  ret = rpmsg_wait(&priv->ept, &cookie.sem);
  if (ret >= 0)
    {
      ret = cookie.result;
    }

fail:
  nxsem_destroy(&cookie.sem);
  return ret;
}

/****************************************************************************
 * Name: rpmsgdev_default_handler