Function dfs_file_unref

components/dfs/dfs_v2/src/dfs_file.c:344–378

* @brief Decrement reference count and release file resources when count reaches zero * * This function safely decrements the reference count of a file structure and releases * associated resources (dentry or vnode) when the reference count drops to zero. * * @param[in,out] file Pointer to the file structure to be unreferenced */

 * @param[in,out] file Pointer to the file structure to be unreferenced
 */
static void dfs_file_unref(struct dfs_file *file)
{
    rt_err_t ret = RT_EOK;

    ret = dfs_file_lock();
    if (ret == RT_EOK)
    {
        if (rt_atomic_load(&(file->ref_count)) == 1)
        {
            /* should release this file */
            if (file->dentry)
            {
                DLOG(msg, "dfs_file", "dentry", DLOG_MSG, "dfs_dentry_unref(dentry(%s))", file->dentry->pathname);
                dfs_dentry_unref(file->dentry);
                file->dentry = RT_NULL;
            }
            else if (file->vnode)
            {
                if (file->vnode->ref_count > 1)
                {
                    rt_atomic_sub(&(file->vnode->ref_count), 1);
                }
                else if (file->vnode->ref_count == 1)
                {
                    rt_free(file->vnode);
                    file->vnode = RT_NULL;
                }
            }

            LOG_I("release a file: %p", file);
        }

        dfs_file_unlock();
    }
}

/**
 * @brief Resolve the real path by resolving symbolic links and normalizing the path