Function rpmsgfs_client_write

fs/rpmsgfs/rpmsgfs_client.c:512–578

}

ssize_t rpmsgfs_client_write(FAR void *handle, int fd,
                             FAR const void *buf, size_t count)
{
  FAR struct rpmsgfs_s *priv = handle;
  struct rpmsgfs_cookie_s cookie;
  size_t written = 0;
  int ret = 0;

  if (!buf || count <= 0)
    {
      return 0;
    }

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

  while (written < count)
    {
      FAR struct rpmsgfs_write_s *msg;
      uint32_t space;

      msg = rpmsgfs_get_tx_payload_buffer(priv, &space);
      if (!msg)
        {
          ret = -ENOMEM;
          goto out;
        }

      space -= sizeof(*msg);
      if (space >= count - written)
        {
          space = count - written;
          msg->header.cookie = (uintptr_t)&cookie;
        }
      else
        {
          msg->header.cookie = 0;
        }

      msg->header.command = RPMSGFS_WRITE;
      msg->header.result  = -ENXIO;
      msg->fd             = fd;
      msg->count          = space;
      memcpy(msg->buf, buf + written, space);

      ret = rpmsg_send_nocopy(&priv->ept, msg, sizeof(*msg) + space);
      if (ret < 0)
        {
          rpmsg_release_tx_buffer(&priv->ept, msg);
          goto out;
        }

      written += space;
    }

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