mirror of
https://github.com/openharmony/third_party_NuttX.git
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yinjiaming
6f982e5c13
【背景】 3.1 代码检视过程中有一些问题需要修复 【修改方案】 更改了一些拼写错误和非可执行文件的权限 【影响】 对现有的产品编译不会有影响。 re #I4XC8T Signed-off-by: yinjiaming <yinjiaming@huawei.com> Change-Id: I3566a17a9d23aff0302c4871480974a8f82ac484
127 lines
4.1 KiB
C
127 lines
4.1 KiB
C
/****************************************************************************
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* drivers/bch/bchlib_cache.c
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*
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* Copyright (C) 2008-2009, 2014, 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 <sys/types.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <assert.h>
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#include "bch.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: bchlib_flushsector
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*
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* Description:
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* Flush the current contents of the sector buffer (if dirty)
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*
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* Assumptions:
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* Caller must assume mutual exclusion
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*
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****************************************************************************/
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int bchlib_flushsector(struct bchlib_s *bch)
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{
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int ret = OK;
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/* Check if the sector has been modified and is out of synch with the
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* media.
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*/
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if (bch->dirty)
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{
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/* Write the sector to the media */
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ret = los_disk_write(bch->disk->disk_id, (const void *)bch->buffer, bch->sector, 1);
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if (ret < 0)
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{
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PRINTK("bchlib_flushsector Write failed: %d\n", ret);
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return ret;
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}
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/* The sector is now in sync with the media */
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bch->dirty = false;
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}
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return ret;
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}
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/****************************************************************************
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* Name: bchlib_readsector
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*
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* Description:
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* Flush the current contents of the sector buffer (if dirty)
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*
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* Assumptions:
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* Caller must assume mutual exclusion
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*
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****************************************************************************/
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int bchlib_readsector(struct bchlib_s *bch, unsigned long long sector)
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{
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int ret = OK;
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if (bch->sector != sector)
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{
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ret = bchlib_flushsector(bch);
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if (ret < 0)
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{
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return ret;
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}
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bch->sector = (unsigned long long)-1;
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/* useRead is set TRUE, it'll use read block for not reading large data */
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ret = los_disk_read(bch->disk->disk_id, (void *)bch->buffer, sector, 1, TRUE);
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if (ret < 0)
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{
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PRINTK("Read failed: %d\n", ret);
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return ret;
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}
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bch->sector = sector;
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}
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return ret;
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}
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