mirror of
https://github.com/apache/nuttx.git
synced 2026-08-02 12:49:00 +00:00
d84bf53085
Add a function to find any driver's registered pointer by the filesystem path. Signed-off-by: Jukka Laitinen <jukka.laitinen@tii.ae>
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/****************************************************************************
|
|
* fs/driver/fs_finddriver.c
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <debug.h>
|
|
|
|
#include "inode/inode.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: find_driver
|
|
*
|
|
* Description:
|
|
* Returns the pointer of a registered driver specified by 'pathname'
|
|
*
|
|
* Input Parameters:
|
|
* pathname - the full path to the driver's device node in file system
|
|
*
|
|
* Returned Value:
|
|
* Pointer to driver's registered private pointer or NULL if not found.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR void *find_driver(FAR const char *pathname)
|
|
{
|
|
struct inode_search_s desc;
|
|
FAR void *drvr = NULL;
|
|
|
|
DEBUGASSERT(pathname != NULL);
|
|
|
|
/* Find the inode registered with this pathname */
|
|
|
|
SETUP_SEARCH(&desc, pathname, false);
|
|
|
|
/* Get the search results */
|
|
|
|
inode_lock();
|
|
if (inode_find(&desc) < 0)
|
|
{
|
|
ferr("ERROR: Failed to find %s\n", pathname);
|
|
}
|
|
else
|
|
{
|
|
drvr = desc.node->i_private;
|
|
inode_release(desc.node);
|
|
}
|
|
|
|
inode_unlock();
|
|
RELEASE_SEARCH(&desc);
|
|
|
|
return drvr;
|
|
}
|