Function dfs_vnode_unref

components/dfs/dfs_v2/src/dfs_vnode.c:139–180

* @brief Decrease reference count of a virtual node (vnode) and potentially free it * * @param[in,out] vnode Pointer to the vnode to be unreferenced */

 * @param[in,out] vnode Pointer to the vnode to be unreferenced
 */
void dfs_vnode_unref(struct dfs_vnode *vnode)
{
    rt_err_t ret = RT_EOK;

    if (vnode)
    {
        ret = dfs_file_lock();
        if (ret == RT_EOK)
        {
            rt_atomic_sub(&(vnode->ref_count), 1);
            DLOG(note, "vnode", "vnode ref_count=%d", rt_atomic_load(&(vnode->ref_count)));
#ifdef RT_USING_PAGECACHE
            if (vnode->aspace)
            {
                dfs_aspace_destroy(vnode->aspace);
            }
#endif
            if (rt_atomic_load(&(vnode->ref_count)) == 0)
            {
                LOG_I("free a vnode: %p", vnode);
                DLOG(msg, "vnode", "vnode", DLOG_MSG, "free vnode, ref_count=0");

                if (vnode->mnt)
                {
                    DLOG(msg, "vnode", vnode->mnt->fs_ops->name, DLOG_MSG, "fs_ops->free_vnode");
                    vnode->mnt->fs_ops->free_vnode(vnode);
                }

                dfs_file_unlock();

                rt_free(vnode);
            }
            else
            {
                dfs_file_unlock();
                DLOG(note, "vnode", "vnode ref_count=%d", rt_atomic_load(&(vnode->ref_count)));
            }
        }
    }

    return;
}