Function rpmsg_register_callback

drivers/rpmsg/rpmsg.c:235–307

}

int rpmsg_register_callback(FAR void *priv,
                            rpmsg_dev_cb_t device_created,
                            rpmsg_dev_cb_t device_destroy,
                            rpmsg_match_cb_t ns_match,
                            rpmsg_bind_cb_t ns_bind)
{
  FAR struct metal_list *node;
  FAR struct metal_list *bnode;
  FAR struct rpmsg_cb_s *cb;

  cb = kmm_zalloc(sizeof(struct rpmsg_cb_s));
  if (cb == NULL)
    {
      return -ENOMEM;
    }

  cb->priv           = priv;
  cb->device_created = device_created;
  cb->device_destroy = device_destroy;
  cb->ns_match       = ns_match;
  cb->ns_bind        = ns_bind;

  down_write(&g_rpmsg_lock);
  metal_list_add_tail(&g_rpmsg_cb, &cb->node);
  downgrade_write(&g_rpmsg_lock);
  metal_list_for_each(&g_rpmsg, node)
    {
      FAR struct rpmsg_s *rpmsg =
        metal_container_of(node, struct rpmsg_s, node);
      FAR struct rpmsg_device *rdev = rpmsg_get_rdev_by_rpmsg(rpmsg);

      if (!rpmsg->init)
        {
          continue;
        }

      if (device_created)
        {
          device_created(rdev, priv);
        }

      if (ns_bind == NULL)
        {
          continue;
        }

      DEBUGASSERT(ns_match != NULL);

again:
      nxrmutex_lock(&rpmsg->lock);
      metal_list_for_each(&rpmsg->bind, bnode)
        {
          FAR struct rpmsg_bind_s *bind =
            metal_container_of(bnode, struct rpmsg_bind_s, node);

          if (ns_match(rdev, priv, bind->name, bind->dest))
            {
              metal_list_del(bnode);