95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/****************************************************************************
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* fs/inode/fs_inoderelease.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/fs/fs.h>
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#include "inode/inode.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: inode_release
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*
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* Description:
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* This is called from close() logic when it no longer refers to the inode.
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*
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****************************************************************************/
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void inode_release(FAR struct inode *node)
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{
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int ret;
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if (node)
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{
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/* Decrement the references of the inode */
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do
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{
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ret = inode_semtake();
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/* This only possible error is due to cancellation of the thread.
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* We need to try again anyway in this case, otherwise the
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* reference count would be wrong.
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*/
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DEBUGASSERT(ret == OK || ret == -ECANCELED);
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}
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while (ret < 0);
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if (node->i_crefs)
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{
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node->i_crefs--;
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}
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/* If the subtree was previously deleted and the reference
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* count has decrement to zero, then delete the inode
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* now.
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*/
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if (node->i_crefs <= 0 && (node->i_flags & FSNODEFLAG_DELETED) != 0)
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{
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/* If the inode has been properly unlinked, then the peer pointer
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* should be NULL.
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*/
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inode_semgive();
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DEBUGASSERT(node->i_peer == NULL);
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inode_free(node);
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}
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else
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{
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inode_semgive();
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}
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}
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}
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