mirror of
https://github.com/eledio-devices/thirdparty-littlefs.git
synced 2025-10-31 16:14:16 +01:00
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/*
|
|
* Block device emulated on standard files
|
|
*
|
|
* Copyright (c) 2017 Christopher Haster
|
|
* Distributed under the MIT license
|
|
*/
|
|
#ifndef LFS_EMUBD_H
|
|
#define LFS_EMUBD_H
|
|
|
|
#include "lfs_config.h"
|
|
#include "lfs_bd.h"
|
|
|
|
|
|
// Stats for debugging and optimization
|
|
struct lfs_bd_stats {
|
|
lfs_lword_t read_count;
|
|
lfs_lword_t write_count;
|
|
lfs_lword_t erase_count;
|
|
};
|
|
|
|
// The emu bd state
|
|
typedef struct lfs_emubd {
|
|
char *path;
|
|
char *child;
|
|
struct lfs_bd_info info;
|
|
struct lfs_bd_stats stats;
|
|
} lfs_emubd_t;
|
|
|
|
|
|
// Create a block device using path for the directory to store blocks
|
|
lfs_error_t lfs_emubd_create(lfs_emubd_t *emu, const char *path);
|
|
|
|
// Clean up memory associated with emu block device
|
|
void lfs_emubd_destroy(lfs_emubd_t *emu);
|
|
|
|
// Read a block
|
|
lfs_error_t lfs_emubd_read(lfs_emubd_t *bd, uint8_t *buffer,
|
|
lfs_ino_t ino, lfs_off_t off, lfs_size_t size);
|
|
|
|
// Program a block
|
|
//
|
|
// The block must have previously been erased.
|
|
lfs_error_t lfs_emubd_write(lfs_emubd_t *bd, const uint8_t *buffer,
|
|
lfs_ino_t ino, lfs_off_t off, lfs_size_t size);
|
|
|
|
// Erase a block
|
|
//
|
|
// A block must be erased before being programmed. The
|
|
// state of an erased block is undefined.
|
|
lfs_error_t lfs_emubd_erase(lfs_emubd_t *bd,
|
|
lfs_ino_t ino, lfs_off_t off, lfs_size_t size);
|
|
|
|
// Sync the block device
|
|
lfs_error_t lfs_emubd_sync(lfs_emubd_t *bd);
|
|
|
|
// Get a description of the block device
|
|
//
|
|
// Any unknown information may be left unmodified
|
|
lfs_error_t lfs_emubd_info(lfs_emubd_t *bd, struct lfs_bd_info *info);
|
|
|
|
// Get stats of operations on the block device
|
|
//
|
|
// Used for debugging and optimizations
|
|
lfs_error_t lfs_emubd_stats(lfs_emubd_t *bd, struct lfs_bd_stats *stats);
|
|
|
|
// Block device operations
|
|
extern const struct lfs_bd_ops lfs_emubd_ops;
|
|
|
|
|
|
#endif
|