1 /****************************************************************************
2 * fs/inode/fs_inodeaddref.c
3 *
4 * Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
5 * Author: Gregory Nutt <gnutt@nuttx.org>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name NuttX nor the names of its contributors may be
18 * used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
28 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 *
34 ****************************************************************************/
35
36 /****************************************************************************
37 * Included Files
38 ****************************************************************************/
39
40 #include <vfs_config.h>
41
42 #include <errno.h>
43 #include <fs/fs.h>
44 #include "inode/inode.h"
45
46 /****************************************************************************
47 * Public Functions
48 ****************************************************************************/
49
50 /****************************************************************************
51 * Name: inode_addref
52 *
53 * Description:
54 * Increment the reference count on an inode (as when a file descriptor
55 * is dup'ed).
56 *
57 ****************************************************************************/
58
inode_addref(FAR struct inode * inode)59 void inode_addref(FAR struct inode *inode)
60 {
61 if (inode)
62 {
63 inode_semtake();
64 inode->i_crefs++;
65 inode_semgive();
66 }
67 }
68