4cec713dbf
Summary: 1.Modified the i_crefs from int16_t to atomic_int 2.Modified the i_crefs add, delete, read, and initialize interfaces to atomic operations The purpose of this change is to avoid deadlock in cross-core scenarios, where A Core blocks B Core’s request for a write operation to A Core when A Core requests a read operation to B Core. Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/****************************************************************************
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* fs/inode/fs_inodeaddref.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 <errno.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_addref
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*
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* Description:
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* Increment the reference count on an inode (as when a file descriptor
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* is dup'ed).
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*
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****************************************************************************/
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int inode_addref(FAR struct inode *inode)
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{
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int ret = OK;
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if (inode)
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{
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atomic_fetch_add(&inode->i_crefs, 1);
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}
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return ret;
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}
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