Function rpmsgdev_wait

drivers/misc/rpmsgdev.c:335–370

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

static int rpmsgdev_wait(FAR struct file *filep, pollevent_t events)
{
  int ret;
  sem_t sem;
  struct pollfd fds;

  nxsem_init(&sem, 0, 0);

  fds.events  = events;
  fds.arg     = &sem;
  fds.cb      = rpmsgdev_wait_cb;
  events     |= POLLERR | POLLHUP;

  while (1)
    {
      ret = rpmsgdev_poll(filep, &fds, true);
      if (ret < 0)
        {
          return ret;
        }

      ret = nxsem_wait(&sem);
      rpmsgdev_poll(filep, &fds, false);
      if (ret < 0)
        {
          return ret;
        }

      if ((fds.revents & events) != 0)
        {
          break;
        }
    }

  return ret;
}

/****************************************************************************
 * Name: rpmsgdev_read