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/****************************************************************************
* drivers/bch/bch_internal.h
*
* Copyright (C) 2008 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 Gregory Nutt 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.
*
****************************************************************************/
#ifndef __FS_BCH_INTERNAL_H
#define __FS_BCH_INTERNAL_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <semaphore.h>
#include <nuttx/fs.h>
/****************************************************************************
* Definitions
****************************************************************************/
#define bchlib_semgive(d) sem_post(&(d)->sem) /* To match bchlib_semtake */
#define MAX_OPENCNT (255) /* Limit of ubyte */
/****************************************************************************
* Public Types
****************************************************************************/
struct bchlib_s
{
struct inode *inode; /* I-node of the block driver */
sem_t sem; /* For atomic accesses to this structure */
size_t nsectors; /* Number of sectors supported by the device */
size_t sector; /* The current sector in the buffer */
uint16 sectsize; /* The size of one sector on the device */
ubyte refs; /* Number of references */
boolean dirty; /* Data has been written to the buffer */
boolean readonly; /* TRUE: Only read operations are supported */
FAR ubyte *buffer; /* One sector buffer */
};
/****************************************************************************
* Global Variables
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
EXTERN struct file_operations bch_fops;
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
EXTERN void bchlib_semtake(FAR struct bchlib_s *bch);
EXTERN int bchlib_flushsector(FAR struct bchlib_s *bch);
EXTERN int bchlib_readsector(FAR struct bchlib_s *bch, size_t sector);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __FS_BCH_INTERNAL_H */
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