forked from Archive/PX4-Autopilot
108 lines
3.8 KiB
C
108 lines
3.8 KiB
C
|
/****************************************************************************
|
||
|
|
* fs_inoderelease.c
|
||
|
|
*
|
||
|
|
* Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
|
||
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
*
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in
|
||
|
|
* the documentation and/or other materials provided with the
|
||
|
|
* distribution.
|
||
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
||
|
|
* used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Included Files
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#include <nuttx/config.h>
|
||
|
|
|
||
|
|
#include <errno.h>
|
||
|
|
|
||
|
|
#include <nuttx/kmalloc.h>
|
||
|
|
#include <nuttx/fs.h>
|
||
|
|
|
||
|
|
#include "fs_internal.h"
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Pre-processor Definitions
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Private Variables
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Public Variables
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Private Functions
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Public Functions
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Name: inode_release
|
||
|
|
*
|
||
|
|
* Description:
|
||
|
|
* This is called from close() logic when it no longer refers
|
||
|
|
* to the inode.
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
void inode_release(FAR struct inode *node)
|
||
|
|
{
|
||
|
|
if (node)
|
||
|
|
{
|
||
|
|
/* Decrement the references of the inode */
|
||
|
|
|
||
|
|
inode_semtake();
|
||
|
|
if (node->i_crefs)
|
||
|
|
{
|
||
|
|
node->i_crefs--;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* If the subtree was previously deleted and the reference
|
||
|
|
* count has decrement to zero, then delete the inode
|
||
|
|
* now.
|
||
|
|
*/
|
||
|
|
|
||
|
|
if (node->i_crefs <= 0 && (node->i_flags & FSNODEFLAG_DELETED) != 0)
|
||
|
|
{
|
||
|
|
inode_semgive();
|
||
|
|
inode_free(node->i_child);
|
||
|
|
kfree(node);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
inode_semgive();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|