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102 lines
4.0 KiB
102 lines
4.0 KiB
/**************************************************************************** |
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* drivers/bch/bch_internal.h |
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* |
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* Copyright (C) 2008-2009 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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#ifndef __FS_BCH_INTERNAL_H |
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#define __FS_BCH_INTERNAL_H |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#include <sys/types.h> |
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#include <stdint.h> |
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#include <stdbool.h> |
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#include <semaphore.h> |
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#include <nuttx/fs/fs.h> |
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/**************************************************************************** |
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* Pre-processor Definitions |
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****************************************************************************/ |
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#define bchlib_semgive(d) sem_post(&(d)->sem) /* To match bchlib_semtake */ |
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#define MAX_OPENCNT (255) /* Limit of uint8_t */ |
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/**************************************************************************** |
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* Public Types |
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****************************************************************************/ |
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struct bchlib_s |
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{ |
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struct inode *inode; /* I-node of the block driver */ |
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sem_t sem; /* For atomic accesses to this structure */ |
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size_t nsectors; /* Number of sectors supported by the device */ |
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size_t sector; /* The current sector in the buffer */ |
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uint16_t sectsize; /* The size of one sector on the device */ |
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uint8_t refs; /* Number of references */ |
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bool dirty; /* Data has been written to the buffer */ |
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bool readonly; /* true: Only read operations are supported */ |
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FAR uint8_t *buffer; /* One sector buffer */ |
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}; |
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/**************************************************************************** |
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* Global Variables |
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****************************************************************************/ |
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#undef EXTERN |
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#if defined(__cplusplus) |
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#define EXTERN extern "C" |
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extern "C" { |
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#else |
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#define EXTERN extern |
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#endif |
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EXTERN const struct file_operations bch_fops; |
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/**************************************************************************** |
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* Public Function Prototypes |
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****************************************************************************/ |
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EXTERN void bchlib_semtake(FAR struct bchlib_s *bch); |
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EXTERN int bchlib_flushsector(FAR struct bchlib_s *bch); |
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EXTERN int bchlib_readsector(FAR struct bchlib_s *bch, size_t sector); |
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#undef EXTERN |
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#if defined(__cplusplus) |
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} |
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#endif |
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#endif /* __FS_BCH_INTERNAL_H */
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