diff options
Diffstat (limited to 'nuttx/fs/fs_inoderelease.c')
-rw-r--r-- | nuttx/fs/fs_inoderelease.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/nuttx/fs/fs_inoderelease.c b/nuttx/fs/fs_inoderelease.c new file mode 100644 index 000000000..bc5026534 --- /dev/null +++ b/nuttx/fs/fs_inoderelease.c @@ -0,0 +1,106 @@ +/**************************************************************************** + * fs_inoderelease.c + * + * Copyright (C) 2007-2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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/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(); + } + } +} + |